./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.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/safe031_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.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 17:57:59,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:57:59,437 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:57:59,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:57:59,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:57:59,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:57:59,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:57:59,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:57:59,467 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:57:59,470 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:57:59,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:57:59,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:57:59,471 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:57:59,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:57:59,473 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:57:59,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:57:59,473 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:57:59,473 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:57:59,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:57:59,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:57:59,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:57:59,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:57:59,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:57:59,474 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:57:59,475 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:57:59,475 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:57:59,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:57:59,475 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:57:59,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:57:59,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:57:59,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:57:59,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:57:59,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:57:59,477 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:57:59,477 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:57:59,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:57:59,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:57:59,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:57:59,478 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:57:59,478 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:57:59,478 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:57:59,478 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:57:59,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:57:59,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:57:59,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:57:59,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:57:59,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:57:59,707 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:57:59,708 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:57:59,709 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:58:00,740 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:58:00,944 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:58:00,945 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:58:00,961 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05d2b428/cb8e1efa46e34f96884a2fd270084d62/FLAG7ea65bc6b [2024-06-21 17:58:00,971 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d05d2b428/cb8e1efa46e34f96884a2fd270084d62 [2024-06-21 17:58:00,973 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:58:00,973 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:58:00,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe031_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 17:58:01,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:58:01,134 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:58:01,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:58:01,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:58:01,139 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:58:01,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:58:00" (1/2) ... [2024-06-21 17:58:01,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c25ee97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:58:01, skipping insertion in model container [2024-06-21 17:58:01,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:58:00" (1/2) ... [2024-06-21 17:58:01,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5782fee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:58:01, skipping insertion in model container [2024-06-21 17:58:01,143 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:01" (2/2) ... [2024-06-21 17:58:01,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c25ee97 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:01, skipping insertion in model container [2024-06-21 17:58:01,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:01" (2/2) ... [2024-06-21 17:58:01,143 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:58:01,214 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:58:01,215 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 17:58:01,216 INFO L97 edCorrectnessWitness]: Location invariant before [L818-L818] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 17:58:01,216 INFO L97 edCorrectnessWitness]: Location invariant before [L820-L820] ((((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2)) [2024-06-21 17:58:01,216 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:58:01,216 INFO L106 edCorrectnessWitness]: ghost_update [L816-L816] multithreaded = 1; [2024-06-21 17:58:01,254 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:58:01,547 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:58:01,559 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:58:01,661 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:58:01,688 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:58:01,688 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:58:01 WrapperNode [2024-06-21 17:58:01,688 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:58:01,689 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:58:01,689 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:58:01,689 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:58:01,695 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,708 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,732 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-21 17:58:01,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:58:01,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:58:01,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:58:01,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:58:01,742 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,742 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,745 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,758 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 17:58:01,758 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,758 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,765 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,767 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,768 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,769 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:58:01,772 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:58:01,773 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:58:01,773 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:58:01,773 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 05:58:01" (1/1) ... [2024-06-21 17:58:01,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:58:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:58:01,801 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 17:58:01,804 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 17:58:01,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:58:01,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:58:01,829 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:58:01,829 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:58:01,829 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:58:01,829 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:58:01,829 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:58:01,829 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:58:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:58:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:58:01,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:58:01,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:58:01,831 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 17:58:01,923 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:58:01,924 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:58:02,180 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:58:02,180 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:58:02,324 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:58:02,325 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:58:02,325 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:58:02 BoogieIcfgContainer [2024-06-21 17:58:02,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:58:02,328 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:58:02,328 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:58:02,330 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:58:02,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:58:00" (1/4) ... [2024-06-21 17:58:02,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b9773e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:58:02, skipping insertion in model container [2024-06-21 17:58:02,331 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:58:01" (2/4) ... [2024-06-21 17:58:02,331 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b9773e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:58:02, skipping insertion in model container [2024-06-21 17:58:02,332 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 05:58:01" (3/4) ... [2024-06-21 17:58:02,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b9773e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:58:02, skipping insertion in model container [2024-06-21 17:58:02,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:58:02" (4/4) ... [2024-06-21 17:58:02,334 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.opt_pso.opt_rmo.opt.i [2024-06-21 17:58:02,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:58:02,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:58:02,348 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:58:02,419 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:58:02,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:58:02,478 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 17:58:02,479 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:58:02,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:58:02,480 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 17:58:02,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 17:58:02,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:58:02,504 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;@4e52a62b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:58:02,504 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:58:02,509 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:58:02,509 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:58:02,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:58:02,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:02,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:58:02,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:02,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash 364147537, now seen corresponding path program 1 times [2024-06-21 17:58:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:02,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289040551] [2024-06-21 17:58:02,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:02,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:03,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:03,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289040551] [2024-06-21 17:58:03,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289040551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:03,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:03,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:58:03,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165348188] [2024-06-21 17:58:03,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:03,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:58:03,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:03,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:58:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:58:03,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 17:58:03,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:03,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:03,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 17:58:03,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:03,602 INFO L124 PetriNetUnfolderBase]: 1059/1629 cut-off events. [2024-06-21 17:58:03,602 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 17:58:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1629 events. 1059/1629 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8049 event pairs, 698 based on Foata normal form. 1/1594 useless extension candidates. Maximal degree in co-relation 3281. Up to 1593 conditions per place. [2024-06-21 17:58:03,613 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 17:58:03,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-21 17:58:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:58:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:58:03,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-21 17:58:03,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-21 17:58:03,624 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 74 transitions. [2024-06-21 17:58:03,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-21 17:58:03,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:03,628 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 17:58:03,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 17:58:03,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 17:58:03,632 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 17:58:03,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:03,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:03,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:03,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:58:03,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:03,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2054472650, now seen corresponding path program 1 times [2024-06-21 17:58:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:03,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687733298] [2024-06-21 17:58:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:03,962 INFO 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 17:58:03,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:03,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687733298] [2024-06-21 17:58:03,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687733298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:03,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:03,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:58:03,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222874762] [2024-06-21 17:58:03,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:03,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:58:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:58:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:58:03,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-21 17:58:03,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:03,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:03,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-21 17:58:03,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:04,184 INFO L124 PetriNetUnfolderBase]: 1053/1620 cut-off events. [2024-06-21 17:58:04,185 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2024-06-21 17:58:04,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3743 conditions, 1620 events. 1053/1620 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7918 event pairs, 618 based on Foata normal form. 3/1621 useless extension candidates. Maximal degree in co-relation 3731. Up to 1569 conditions per place. [2024-06-21 17:58:04,194 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 17:58:04,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 236 flow [2024-06-21 17:58:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:58:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:58:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-21 17:58:04,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 17:58:04,197 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 96 transitions. [2024-06-21 17:58:04,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 236 flow [2024-06-21 17:58:04,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:58:04,200 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 17:58:04,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 17:58:04,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 17:58:04,201 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 17:58:04,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:04,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:04,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:04,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:58:04,202 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:04,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:04,204 INFO L85 PathProgramCache]: Analyzing trace with hash 964719951, now seen corresponding path program 1 times [2024-06-21 17:58:04,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:04,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113871693] [2024-06-21 17:58:04,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:04,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:04,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:04,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113871693] [2024-06-21 17:58:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113871693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:04,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042185041] [2024-06-21 17:58:04,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:04,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:04,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:04,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:04,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:04,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:05,035 INFO L124 PetriNetUnfolderBase]: 1342/2032 cut-off events. [2024-06-21 17:58:05,035 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-21 17:58:05,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5206 conditions, 2032 events. 1342/2032 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9696 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-21 17:58:05,046 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 8 changer transitions 0/52 dead transitions. [2024-06-21 17:58:05,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 270 flow [2024-06-21 17:58:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:58:05,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:58:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-21 17:58:05,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-21 17:58:05,048 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 91 transitions. [2024-06-21 17:58:05,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 270 flow [2024-06-21 17:58:05,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:05,050 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 164 flow [2024-06-21 17:58:05,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 17:58:05,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 17:58:05,051 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 164 flow [2024-06-21 17:58:05,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:05,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:05,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:05,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:58:05,052 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:05,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash -250177554, now seen corresponding path program 1 times [2024-06-21 17:58:05,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:05,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429814604] [2024-06-21 17:58:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:05,517 INFO 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 17:58:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:05,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429814604] [2024-06-21 17:58:05,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429814604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:05,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:05,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:05,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280522415] [2024-06-21 17:58:05,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:05,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:05,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:05,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:05,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:05,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 17:58:05,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:05,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:05,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 17:58:05,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:05,834 INFO L124 PetriNetUnfolderBase]: 1333/2017 cut-off events. [2024-06-21 17:58:05,835 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2024-06-21 17:58:05,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 2017 events. 1333/2017 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9630 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-21 17:58:05,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 17:58:05,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 378 flow [2024-06-21 17:58:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:05,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-21 17:58:05,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-21 17:58:05,848 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 164 flow. Second operand 6 states and 131 transitions. [2024-06-21 17:58:05,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 378 flow [2024-06-21 17:58:05,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 360 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:05,850 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 205 flow [2024-06-21 17:58:05,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 17:58:05,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 17:58:05,851 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 205 flow [2024-06-21 17:58:05,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:05,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:05,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:05,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:58:05,852 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:05,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash -158451778, now seen corresponding path program 1 times [2024-06-21 17:58:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:05,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696151592] [2024-06-21 17:58:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:06,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:06,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696151592] [2024-06-21 17:58:06,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696151592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:06,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:06,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:06,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160697148] [2024-06-21 17:58:06,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:06,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:06,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:06,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:06,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 205 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 17:58:06,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:06,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:06,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:06,775 INFO L124 PetriNetUnfolderBase]: 1323/2003 cut-off events. [2024-06-21 17:58:06,776 INFO L125 PetriNetUnfolderBase]: For 3192/3192 co-relation queries the response was YES. [2024-06-21 17:58:06,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6113 conditions, 2003 events. 1323/2003 cut-off events. For 3192/3192 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9524 event pairs, 556 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 6095. Up to 1948 conditions per place. [2024-06-21 17:58:06,786 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-06-21 17:58:06,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 381 flow [2024-06-21 17:58:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:58:06,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 17:58:06,788 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 205 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:58:06,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 381 flow [2024-06-21 17:58:06,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 352 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:06,791 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 230 flow [2024-06-21 17:58:06,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 17:58:06,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-21 17:58:06,792 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 230 flow [2024-06-21 17:58:06,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 17:58:06,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:06,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:06,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:58:06,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:06,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:06,793 INFO L85 PathProgramCache]: Analyzing trace with hash 265243754, now seen corresponding path program 1 times [2024-06-21 17:58:06,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:06,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252632435] [2024-06-21 17:58:06,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:07,250 INFO 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 17:58:07,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:07,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252632435] [2024-06-21 17:58:07,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252632435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:07,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:07,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:07,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561564440] [2024-06-21 17:58:07,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:07,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:07,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:07,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:07,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:07,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 17:58:07,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:07,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:07,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:07,672 INFO L124 PetriNetUnfolderBase]: 1334/2025 cut-off events. [2024-06-21 17:58:07,673 INFO L125 PetriNetUnfolderBase]: For 4482/4486 co-relation queries the response was YES. [2024-06-21 17:58:07,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 2025 events. 1334/2025 cut-off events. For 4482/4486 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9750 event pairs, 557 based on Foata normal form. 6/2031 useless extension candidates. Maximal degree in co-relation 6612. Up to 1947 conditions per place. [2024-06-21 17:58:07,685 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 53 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-21 17:58:07,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 478 flow [2024-06-21 17:58:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 17:58:07,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-21 17:58:07,687 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 230 flow. Second operand 6 states and 113 transitions. [2024-06-21 17:58:07,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 478 flow [2024-06-21 17:58:07,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 448 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:07,690 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 286 flow [2024-06-21 17:58:07,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-21 17:58:07,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 17:58:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 286 flow [2024-06-21 17:58:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 17:58:07,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:07,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:58:07,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:07,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash -577721786, now seen corresponding path program 2 times [2024-06-21 17:58:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:07,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632082364] [2024-06-21 17:58:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:08,136 INFO 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 17:58:08,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632082364] [2024-06-21 17:58:08,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632082364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:08,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:08,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354015383] [2024-06-21 17:58:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:08,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:08,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:08,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 17:58:08,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:08,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:08,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:08,560 INFO L124 PetriNetUnfolderBase]: 1329/2012 cut-off events. [2024-06-21 17:58:08,561 INFO L125 PetriNetUnfolderBase]: For 6020/6020 co-relation queries the response was YES. [2024-06-21 17:58:08,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7059 conditions, 2012 events. 1329/2012 cut-off events. For 6020/6020 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9663 event pairs, 560 based on Foata normal form. 2/2013 useless extension candidates. Maximal degree in co-relation 7038. Up to 1942 conditions per place. [2024-06-21 17:58:08,572 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 16 changer transitions 0/69 dead transitions. [2024-06-21 17:58:08,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 452 flow [2024-06-21 17:58:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:58:08,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:58:08,574 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 286 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:58:08,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 452 flow [2024-06-21 17:58:08,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 418 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:08,579 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 292 flow [2024-06-21 17:58:08,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-21 17:58:08,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-21 17:58:08,580 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 292 flow [2024-06-21 17:58:08,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 17:58:08,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:08,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:08,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:58:08,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:08,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash -95457399, now seen corresponding path program 1 times [2024-06-21 17:58:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:08,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655931765] [2024-06-21 17:58:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:08,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:09,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:09,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655931765] [2024-06-21 17:58:09,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655931765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:09,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:09,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:09,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145160604] [2024-06-21 17:58:09,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:09,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:09,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:09,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:09,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:09,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 292 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:09,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:09,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:09,520 INFO L124 PetriNetUnfolderBase]: 1408/2139 cut-off events. [2024-06-21 17:58:09,520 INFO L125 PetriNetUnfolderBase]: For 7677/7677 co-relation queries the response was YES. [2024-06-21 17:58:09,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7673 conditions, 2139 events. 1408/2139 cut-off events. For 7677/7677 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10360 event pairs, 515 based on Foata normal form. 4/2142 useless extension candidates. Maximal degree in co-relation 7650. Up to 1947 conditions per place. [2024-06-21 17:58:09,560 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 68 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-21 17:58:09,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 109 transitions, 787 flow [2024-06-21 17:58:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:09,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:58:09,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-21 17:58:09,562 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 292 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:58:09,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 109 transitions, 787 flow [2024-06-21 17:58:09,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 709 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:09,567 INFO L231 Difference]: Finished difference. Result has 65 places, 75 transitions, 493 flow [2024-06-21 17:58:09,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=493, PETRI_PLACES=65, PETRI_TRANSITIONS=75} [2024-06-21 17:58:09,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-21 17:58:09,568 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 75 transitions, 493 flow [2024-06-21 17:58:09,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:09,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:09,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:09,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:58:09,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:09,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:09,569 INFO L85 PathProgramCache]: Analyzing trace with hash -432105655, now seen corresponding path program 2 times [2024-06-21 17:58:09,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074347241] [2024-06-21 17:58:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:10,047 INFO 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 17:58:10,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:10,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074347241] [2024-06-21 17:58:10,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074347241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:10,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:10,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:10,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571492069] [2024-06-21 17:58:10,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:10,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:10,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:10,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:10,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:10,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 75 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:10,582 INFO L124 PetriNetUnfolderBase]: 1444/2201 cut-off events. [2024-06-21 17:58:10,582 INFO L125 PetriNetUnfolderBase]: For 10103/10103 co-relation queries the response was YES. [2024-06-21 17:58:10,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8583 conditions, 2201 events. 1444/2201 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10689 event pairs, 514 based on Foata normal form. 6/2206 useless extension candidates. Maximal degree in co-relation 8557. Up to 1979 conditions per place. [2024-06-21 17:58:10,596 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 42 changer transitions 0/109 dead transitions. [2024-06-21 17:58:10,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 109 transitions, 881 flow [2024-06-21 17:58:10,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 17:58:10,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-21 17:58:10,598 INFO L175 Difference]: Start difference. First operand has 65 places, 75 transitions, 493 flow. Second operand 7 states and 134 transitions. [2024-06-21 17:58:10,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 109 transitions, 881 flow [2024-06-21 17:58:10,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 109 transitions, 855 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:10,605 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 628 flow [2024-06-21 17:58:10,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2024-06-21 17:58:10,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-21 17:58:10,606 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 628 flow [2024-06-21 17:58:10,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:10,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:10,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:10,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:58:10,607 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:10,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -729238459, now seen corresponding path program 3 times [2024-06-21 17:58:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:10,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982993029] [2024-06-21 17:58:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:10,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:11,107 INFO 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 17:58:11,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:11,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982993029] [2024-06-21 17:58:11,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982993029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:11,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:11,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:11,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154696073] [2024-06-21 17:58:11,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:11,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:11,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:11,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:11,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 628 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:11,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:11,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:11,582 INFO L124 PetriNetUnfolderBase]: 1480/2248 cut-off events. [2024-06-21 17:58:11,583 INFO L125 PetriNetUnfolderBase]: For 12383/12383 co-relation queries the response was YES. [2024-06-21 17:58:11,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9274 conditions, 2248 events. 1480/2248 cut-off events. For 12383/12383 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10883 event pairs, 510 based on Foata normal form. 6/2253 useless extension candidates. Maximal degree in co-relation 9246. Up to 2011 conditions per place. [2024-06-21 17:58:11,599 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 49 changer transitions 0/112 dead transitions. [2024-06-21 17:58:11,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 1032 flow [2024-06-21 17:58:11,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:58:11,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 17:58:11,601 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 628 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:58:11,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 1032 flow [2024-06-21 17:58:11,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:11,613 INFO L231 Difference]: Finished difference. Result has 72 places, 87 transitions, 711 flow [2024-06-21 17:58:11,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=72, PETRI_TRANSITIONS=87} [2024-06-21 17:58:11,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-21 17:58:11,615 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 87 transitions, 711 flow [2024-06-21 17:58:11,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:11,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:11,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:11,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:58:11,616 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:11,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1948553089, now seen corresponding path program 4 times [2024-06-21 17:58:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452060902] [2024-06-21 17:58:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:11,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:12,102 INFO 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 17:58:12,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:12,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452060902] [2024-06-21 17:58:12,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452060902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:12,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:12,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:12,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457590530] [2024-06-21 17:58:12,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:12,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:12,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:12,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:12,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:12,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:12,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 87 transitions, 711 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:12,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:12,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:12,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:12,633 INFO L124 PetriNetUnfolderBase]: 1464/2228 cut-off events. [2024-06-21 17:58:12,634 INFO L125 PetriNetUnfolderBase]: For 12404/12404 co-relation queries the response was YES. [2024-06-21 17:58:12,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9088 conditions, 2228 events. 1464/2228 cut-off events. For 12404/12404 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10759 event pairs, 513 based on Foata normal form. 6/2233 useless extension candidates. Maximal degree in co-relation 9060. Up to 1998 conditions per place. [2024-06-21 17:58:12,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 58 selfloop transitions, 47 changer transitions 0/110 dead transitions. [2024-06-21 17:58:12,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 995 flow [2024-06-21 17:58:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:58:12,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-21 17:58:12,648 INFO L175 Difference]: Start difference. First operand has 72 places, 87 transitions, 711 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:58:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 995 flow [2024-06-21 17:58:12,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 862 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:12,659 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 683 flow [2024-06-21 17:58:12,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=683, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-21 17:58:12,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-21 17:58:12,659 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 683 flow [2024-06-21 17:58:12,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:12,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:12,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:12,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:58:12,660 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:12,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1948276259, now seen corresponding path program 1 times [2024-06-21 17:58:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:12,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768526433] [2024-06-21 17:58:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:13,431 INFO 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 17:58:13,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:13,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768526433] [2024-06-21 17:58:13,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768526433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:13,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:13,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857786633] [2024-06-21 17:58:13,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:13,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:13,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:13,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:13,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:13,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:13,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 683 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:13,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:13,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:13,935 INFO L124 PetriNetUnfolderBase]: 1456/2219 cut-off events. [2024-06-21 17:58:13,935 INFO L125 PetriNetUnfolderBase]: For 13686/13686 co-relation queries the response was YES. [2024-06-21 17:58:13,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9101 conditions, 2219 events. 1456/2219 cut-off events. For 13686/13686 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10658 event pairs, 519 based on Foata normal form. 4/2223 useless extension candidates. Maximal degree in co-relation 9072. Up to 2123 conditions per place. [2024-06-21 17:58:13,946 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 92 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2024-06-21 17:58:13,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 110 transitions, 979 flow [2024-06-21 17:58:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:58:13,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:58:13,948 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 683 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:58:13,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 110 transitions, 979 flow [2024-06-21 17:58:13,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 845 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:13,959 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 610 flow [2024-06-21 17:58:13,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=610, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-21 17:58:13,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-21 17:58:13,960 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 610 flow [2024-06-21 17:58:13,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:13,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:13,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:13,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:58:13,961 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:13,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:13,961 INFO L85 PathProgramCache]: Analyzing trace with hash -555715092, now seen corresponding path program 1 times [2024-06-21 17:58:13,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:13,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951267256] [2024-06-21 17:58:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:13,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:14,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:14,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951267256] [2024-06-21 17:58:14,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951267256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:14,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:14,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:58:14,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363375073] [2024-06-21 17:58:14,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:14,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:58:14,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:58:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:58:14,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:14,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:14,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:14,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:14,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:14,628 INFO L124 PetriNetUnfolderBase]: 1323/2086 cut-off events. [2024-06-21 17:58:14,629 INFO L125 PetriNetUnfolderBase]: For 14238/14238 co-relation queries the response was YES. [2024-06-21 17:58:14,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8589 conditions, 2086 events. 1323/2086 cut-off events. For 14238/14238 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10220 event pairs, 556 based on Foata normal form. 1/2087 useless extension candidates. Maximal degree in co-relation 8559. Up to 1959 conditions per place. [2024-06-21 17:58:14,641 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-06-21 17:58:14,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 814 flow [2024-06-21 17:58:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:58:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:58:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 17:58:14,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:58:14,643 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 610 flow. Second operand 5 states and 90 transitions. [2024-06-21 17:58:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 814 flow [2024-06-21 17:58:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 771 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:14,652 INFO L231 Difference]: Finished difference. Result has 75 places, 92 transitions, 615 flow [2024-06-21 17:58:14,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=567, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=615, PETRI_PLACES=75, PETRI_TRANSITIONS=92} [2024-06-21 17:58:14,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-21 17:58:14,654 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 92 transitions, 615 flow [2024-06-21 17:58:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:58:14,654 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:14,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash -510557147, now seen corresponding path program 1 times [2024-06-21 17:58:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:14,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682624936] [2024-06-21 17:58:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:15,155 INFO 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 17:58:15,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:15,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682624936] [2024-06-21 17:58:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682624936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:15,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028827284] [2024-06-21 17:58:15,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:15,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:15,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:15,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 92 transitions, 615 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:15,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:15,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:15,666 INFO L124 PetriNetUnfolderBase]: 1464/2238 cut-off events. [2024-06-21 17:58:15,666 INFO L125 PetriNetUnfolderBase]: For 16613/16613 co-relation queries the response was YES. [2024-06-21 17:58:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9619 conditions, 2238 events. 1464/2238 cut-off events. For 16613/16613 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10838 event pairs, 529 based on Foata normal form. 2/2240 useless extension candidates. Maximal degree in co-relation 9588. Up to 2130 conditions per place. [2024-06-21 17:58:15,679 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2024-06-21 17:58:15,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 120 transitions, 953 flow [2024-06-21 17:58:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:15,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:58:15,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-21 17:58:15,681 INFO L175 Difference]: Start difference. First operand has 75 places, 92 transitions, 615 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:58:15,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 120 transitions, 953 flow [2024-06-21 17:58:15,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 120 transitions, 927 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:15,694 INFO L231 Difference]: Finished difference. Result has 79 places, 95 transitions, 665 flow [2024-06-21 17:58:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=665, PETRI_PLACES=79, PETRI_TRANSITIONS=95} [2024-06-21 17:58:15,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-21 17:58:15,695 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 95 transitions, 665 flow [2024-06-21 17:58:15,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:15,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:15,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:15,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:58:15,696 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:15,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:15,697 INFO L85 PathProgramCache]: Analyzing trace with hash -510379517, now seen corresponding path program 2 times [2024-06-21 17:58:15,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:15,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201639303] [2024-06-21 17:58:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:15,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:16,212 INFO 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 17:58:16,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:16,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201639303] [2024-06-21 17:58:16,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201639303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:16,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:16,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:16,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178616508] [2024-06-21 17:58:16,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:16,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:16,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:16,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 95 transitions, 665 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:16,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:16,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:16,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:16,699 INFO L124 PetriNetUnfolderBase]: 1475/2258 cut-off events. [2024-06-21 17:58:16,699 INFO L125 PetriNetUnfolderBase]: For 19490/19492 co-relation queries the response was YES. [2024-06-21 17:58:16,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10206 conditions, 2258 events. 1475/2258 cut-off events. For 19490/19492 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11003 event pairs, 523 based on Foata normal form. 4/2262 useless extension candidates. Maximal degree in co-relation 10174. Up to 2075 conditions per place. [2024-06-21 17:58:16,711 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 88 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-21 17:58:16,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 127 transitions, 1111 flow [2024-06-21 17:58:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:58:16,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-21 17:58:16,713 INFO L175 Difference]: Start difference. First operand has 79 places, 95 transitions, 665 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:58:16,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 127 transitions, 1111 flow [2024-06-21 17:58:16,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1059 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:16,727 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 765 flow [2024-06-21 17:58:16,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=765, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-06-21 17:58:16,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-21 17:58:16,728 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 765 flow [2024-06-21 17:58:16,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:16,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:16,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:16,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:58:16,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:16,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash -808665077, now seen corresponding path program 3 times [2024-06-21 17:58:16,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:16,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696862464] [2024-06-21 17:58:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:17,211 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 17:58:17,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696862464] [2024-06-21 17:58:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696862464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:17,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:17,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:17,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116276434] [2024-06-21 17:58:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:17,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:17,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:17,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:17,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:17,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:17,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:17,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:17,691 INFO L124 PetriNetUnfolderBase]: 1470/2242 cut-off events. [2024-06-21 17:58:17,691 INFO L125 PetriNetUnfolderBase]: For 22776/22776 co-relation queries the response was YES. [2024-06-21 17:58:17,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10623 conditions, 2242 events. 1470/2242 cut-off events. For 22776/22776 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10867 event pairs, 531 based on Foata normal form. 2/2242 useless extension candidates. Maximal degree in co-relation 10590. Up to 2070 conditions per place. [2024-06-21 17:58:17,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 84 selfloop transitions, 33 changer transitions 0/122 dead transitions. [2024-06-21 17:58:17,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1071 flow [2024-06-21 17:58:17,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:58:17,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:58:17,706 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 765 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:58:17,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1071 flow [2024-06-21 17:58:17,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1003 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:17,724 INFO L231 Difference]: Finished difference. Result has 85 places, 101 transitions, 772 flow [2024-06-21 17:58:17,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=697, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=85, PETRI_TRANSITIONS=101} [2024-06-21 17:58:17,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-21 17:58:17,725 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 101 transitions, 772 flow [2024-06-21 17:58:17,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:17,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:17,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:17,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:58:17,726 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:17,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:17,726 INFO L85 PathProgramCache]: Analyzing trace with hash -47297489, now seen corresponding path program 1 times [2024-06-21 17:58:17,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:17,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713269722] [2024-06-21 17:58:17,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:17,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:18,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713269722] [2024-06-21 17:58:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713269722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:18,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:18,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766026583] [2024-06-21 17:58:18,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:18,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:18,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:18,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 101 transitions, 772 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:18,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:18,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:18,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:18,517 INFO L124 PetriNetUnfolderBase]: 1342/2123 cut-off events. [2024-06-21 17:58:18,517 INFO L125 PetriNetUnfolderBase]: For 24687/24692 co-relation queries the response was YES. [2024-06-21 17:58:18,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10218 conditions, 2123 events. 1342/2123 cut-off events. For 24687/24692 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10527 event pairs, 527 based on Foata normal form. 3/2124 useless extension candidates. Maximal degree in co-relation 10183. Up to 1934 conditions per place. [2024-06-21 17:58:18,527 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-21 17:58:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 1092 flow [2024-06-21 17:58:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-21 17:58:18,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44308943089430897 [2024-06-21 17:58:18,530 INFO L175 Difference]: Start difference. First operand has 85 places, 101 transitions, 772 flow. Second operand 6 states and 109 transitions. [2024-06-21 17:58:18,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 1092 flow [2024-06-21 17:58:18,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 120 transitions, 1006 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:18,545 INFO L231 Difference]: Finished difference. Result has 86 places, 109 transitions, 813 flow [2024-06-21 17:58:18,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=813, PETRI_PLACES=86, PETRI_TRANSITIONS=109} [2024-06-21 17:58:18,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-21 17:58:18,546 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 109 transitions, 813 flow [2024-06-21 17:58:18,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:18,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:18,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:18,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:58:18,547 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:18,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:18,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1205762398, now seen corresponding path program 1 times [2024-06-21 17:58:18,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:18,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041519487] [2024-06-21 17:58:18,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:18,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:18,966 INFO 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 17:58:18,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:18,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041519487] [2024-06-21 17:58:18,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041519487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:18,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:18,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978589677] [2024-06-21 17:58:18,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:18,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:19,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:19,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 109 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:19,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:19,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:19,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:19,656 INFO L124 PetriNetUnfolderBase]: 1585/2437 cut-off events. [2024-06-21 17:58:19,656 INFO L125 PetriNetUnfolderBase]: For 30405/30405 co-relation queries the response was YES. [2024-06-21 17:58:19,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 2437 events. 1585/2437 cut-off events. For 30405/30405 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 12004 event pairs, 521 based on Foata normal form. 4/2441 useless extension candidates. Maximal degree in co-relation 12301. Up to 2234 conditions per place. [2024-06-21 17:58:19,670 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 132 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-21 17:58:19,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 173 transitions, 1548 flow [2024-06-21 17:58:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:58:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:58:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 17:58:19,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44124168514412415 [2024-06-21 17:58:19,672 INFO L175 Difference]: Start difference. First operand has 86 places, 109 transitions, 813 flow. Second operand 11 states and 199 transitions. [2024-06-21 17:58:19,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 173 transitions, 1548 flow [2024-06-21 17:58:19,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 173 transitions, 1507 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:19,691 INFO L231 Difference]: Finished difference. Result has 98 places, 129 transitions, 1060 flow [2024-06-21 17:58:19,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1060, PETRI_PLACES=98, PETRI_TRANSITIONS=129} [2024-06-21 17:58:19,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-21 17:58:19,692 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 129 transitions, 1060 flow [2024-06-21 17:58:19,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:19,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:19,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:19,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:58:19,693 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:19,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:19,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1010165820, now seen corresponding path program 2 times [2024-06-21 17:58:19,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:19,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825798903] [2024-06-21 17:58:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:19,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:20,299 INFO 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 17:58:20,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:20,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825798903] [2024-06-21 17:58:20,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825798903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:20,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:20,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:20,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254250516] [2024-06-21 17:58:20,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:20,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:20,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:20,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:20,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 129 transitions, 1060 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:20,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:20,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:20,789 INFO L124 PetriNetUnfolderBase]: 1569/2413 cut-off events. [2024-06-21 17:58:20,790 INFO L125 PetriNetUnfolderBase]: For 34284/34284 co-relation queries the response was YES. [2024-06-21 17:58:20,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 2413 events. 1569/2413 cut-off events. For 34284/34284 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 11902 event pairs, 520 based on Foata normal form. 6/2419 useless extension candidates. Maximal degree in co-relation 12779. Up to 2221 conditions per place. [2024-06-21 17:58:20,803 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 120 selfloop transitions, 34 changer transitions 0/159 dead transitions. [2024-06-21 17:58:20,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1487 flow [2024-06-21 17:58:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:20,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:58:20,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:58:20,805 INFO L175 Difference]: Start difference. First operand has 98 places, 129 transitions, 1060 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:58:20,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1487 flow [2024-06-21 17:58:20,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1378 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:20,824 INFO L231 Difference]: Finished difference. Result has 102 places, 129 transitions, 1036 flow [2024-06-21 17:58:20,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1036, PETRI_PLACES=102, PETRI_TRANSITIONS=129} [2024-06-21 17:58:20,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-21 17:58:20,825 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 129 transitions, 1036 flow [2024-06-21 17:58:20,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:20,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:20,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:20,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:58:20,826 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:20,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:20,826 INFO L85 PathProgramCache]: Analyzing trace with hash -862348830, now seen corresponding path program 3 times [2024-06-21 17:58:20,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:20,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079493564] [2024-06-21 17:58:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:20,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:21,365 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 17:58:21,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:21,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079493564] [2024-06-21 17:58:21,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079493564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:21,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:21,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:21,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26145990] [2024-06-21 17:58:21,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:21,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:21,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 129 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:21,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:21,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:22,051 INFO L124 PetriNetUnfolderBase]: 1623/2499 cut-off events. [2024-06-21 17:58:22,052 INFO L125 PetriNetUnfolderBase]: For 37839/37839 co-relation queries the response was YES. [2024-06-21 17:58:22,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13497 conditions, 2499 events. 1623/2499 cut-off events. For 37839/37839 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12481 event pairs, 461 based on Foata normal form. 4/2502 useless extension candidates. Maximal degree in co-relation 13453. Up to 1989 conditions per place. [2024-06-21 17:58:22,065 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 74 changer transitions 0/174 dead transitions. [2024-06-21 17:58:22,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 174 transitions, 1773 flow [2024-06-21 17:58:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:22,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 17:58:22,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:58:22,067 INFO L175 Difference]: Start difference. First operand has 102 places, 129 transitions, 1036 flow. Second operand 8 states and 156 transitions. [2024-06-21 17:58:22,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 174 transitions, 1773 flow [2024-06-21 17:58:22,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 174 transitions, 1684 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:22,089 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1251 flow [2024-06-21 17:58:22,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=955, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1251, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-21 17:58:22,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-21 17:58:22,090 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1251 flow [2024-06-21 17:58:22,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:22,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:22,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:22,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:58:22,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:22,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1358104970, now seen corresponding path program 4 times [2024-06-21 17:58:22,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:22,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468623892] [2024-06-21 17:58:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:22,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:22,615 INFO 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 17:58:22,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:22,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468623892] [2024-06-21 17:58:22,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468623892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:22,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:22,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:22,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488835143] [2024-06-21 17:58:22,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:22,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:22,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:22,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:22,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1251 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:22,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:22,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:22,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:23,228 INFO L124 PetriNetUnfolderBase]: 1613/2489 cut-off events. [2024-06-21 17:58:23,228 INFO L125 PetriNetUnfolderBase]: For 38972/38972 co-relation queries the response was YES. [2024-06-21 17:58:23,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13748 conditions, 2489 events. 1613/2489 cut-off events. For 38972/38972 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12402 event pairs, 478 based on Foata normal form. 4/2492 useless extension candidates. Maximal degree in co-relation 13704. Up to 1981 conditions per place. [2024-06-21 17:58:23,241 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 73 changer transitions 0/171 dead transitions. [2024-06-21 17:58:23,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 171 transitions, 1769 flow [2024-06-21 17:58:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 17:58:23,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-21 17:58:23,242 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1251 flow. Second operand 8 states and 156 transitions. [2024-06-21 17:58:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 171 transitions, 1769 flow [2024-06-21 17:58:23,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 171 transitions, 1667 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:23,272 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1303 flow [2024-06-21 17:58:23,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1303, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-21 17:58:23,272 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-21 17:58:23,272 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1303 flow [2024-06-21 17:58:23,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:23,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:23,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:23,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:58:23,273 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:23,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:23,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1571248508, now seen corresponding path program 1 times [2024-06-21 17:58:23,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:23,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930218814] [2024-06-21 17:58:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:23,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:24,085 INFO 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 17:58:24,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930218814] [2024-06-21 17:58:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930218814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:24,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:24,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536810588] [2024-06-21 17:58:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:24,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:24,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:24,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:24,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1303 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:24,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:24,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:24,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:24,709 INFO L124 PetriNetUnfolderBase]: 1630/2514 cut-off events. [2024-06-21 17:58:24,709 INFO L125 PetriNetUnfolderBase]: For 41446/41446 co-relation queries the response was YES. [2024-06-21 17:58:24,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13974 conditions, 2514 events. 1630/2514 cut-off events. For 41446/41446 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12540 event pairs, 485 based on Foata normal form. 4/2517 useless extension candidates. Maximal degree in co-relation 13928. Up to 2216 conditions per place. [2024-06-21 17:58:24,723 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 116 selfloop transitions, 50 changer transitions 0/171 dead transitions. [2024-06-21 17:58:24,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1783 flow [2024-06-21 17:58:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:58:24,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 17:58:24,725 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1303 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:58:24,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1783 flow [2024-06-21 17:58:24,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 171 transitions, 1633 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:24,750 INFO L231 Difference]: Finished difference. Result has 110 places, 140 transitions, 1296 flow [2024-06-21 17:58:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1153, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1296, PETRI_PLACES=110, PETRI_TRANSITIONS=140} [2024-06-21 17:58:24,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 17:58:24,750 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 140 transitions, 1296 flow [2024-06-21 17:58:24,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:24,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:24,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:24,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:58:24,751 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:24,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1625009217, now seen corresponding path program 1 times [2024-06-21 17:58:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300282964] [2024-06-21 17:58:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:25,135 INFO 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 17:58:25,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:25,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300282964] [2024-06-21 17:58:25,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300282964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:25,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:25,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:25,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961830247] [2024-06-21 17:58:25,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:25,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:25,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:25,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:25,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:25,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:25,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 140 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:25,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:25,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:25,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:25,554 INFO L124 PetriNetUnfolderBase]: 1514/2402 cut-off events. [2024-06-21 17:58:25,555 INFO L125 PetriNetUnfolderBase]: For 45019/45029 co-relation queries the response was YES. [2024-06-21 17:58:25,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13600 conditions, 2402 events. 1514/2402 cut-off events. For 45019/45029 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12213 event pairs, 511 based on Foata normal form. 2/2386 useless extension candidates. Maximal degree in co-relation 13553. Up to 2171 conditions per place. [2024-06-21 17:58:25,570 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 119 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-06-21 17:58:25,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 158 transitions, 1658 flow [2024-06-21 17:58:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:58:25,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 17:58:25,571 INFO L175 Difference]: Start difference. First operand has 110 places, 140 transitions, 1296 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:58:25,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 158 transitions, 1658 flow [2024-06-21 17:58:25,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1537 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:25,606 INFO L231 Difference]: Finished difference. Result has 110 places, 143 transitions, 1256 flow [2024-06-21 17:58:25,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1256, PETRI_PLACES=110, PETRI_TRANSITIONS=143} [2024-06-21 17:58:25,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-21 17:58:25,606 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 143 transitions, 1256 flow [2024-06-21 17:58:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:25,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:25,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:58:25,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:25,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:25,607 INFO L85 PathProgramCache]: Analyzing trace with hash 46241630, now seen corresponding path program 5 times [2024-06-21 17:58:25,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:25,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911327821] [2024-06-21 17:58:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:25,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:26,124 INFO 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 17:58:26,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:26,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911327821] [2024-06-21 17:58:26,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911327821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:26,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:26,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:26,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492605573] [2024-06-21 17:58:26,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:26,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:26,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:26,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:26,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 143 transitions, 1256 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:26,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:26,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:26,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:26,752 INFO L124 PetriNetUnfolderBase]: 1694/2614 cut-off events. [2024-06-21 17:58:26,752 INFO L125 PetriNetUnfolderBase]: For 50562/50562 co-relation queries the response was YES. [2024-06-21 17:58:26,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14816 conditions, 2614 events. 1694/2614 cut-off events. For 50562/50562 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13192 event pairs, 468 based on Foata normal form. 4/2615 useless extension candidates. Maximal degree in co-relation 14768. Up to 2068 conditions per place. [2024-06-21 17:58:26,768 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 102 selfloop transitions, 76 changer transitions 0/183 dead transitions. [2024-06-21 17:58:26,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 183 transitions, 2000 flow [2024-06-21 17:58:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:58:26,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-21 17:58:26,769 INFO L175 Difference]: Start difference. First operand has 110 places, 143 transitions, 1256 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:58:26,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 183 transitions, 2000 flow [2024-06-21 17:58:26,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 1957 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:26,805 INFO L231 Difference]: Finished difference. Result has 114 places, 149 transitions, 1480 flow [2024-06-21 17:58:26,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1480, PETRI_PLACES=114, PETRI_TRANSITIONS=149} [2024-06-21 17:58:26,806 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-21 17:58:26,806 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 149 transitions, 1480 flow [2024-06-21 17:58:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:26,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:26,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:26,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:58:26,806 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:26,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:26,807 INFO L85 PathProgramCache]: Analyzing trace with hash 302742140, now seen corresponding path program 6 times [2024-06-21 17:58:26,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:26,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518972820] [2024-06-21 17:58:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:26,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:27,313 INFO 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 17:58:27,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518972820] [2024-06-21 17:58:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518972820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:27,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:27,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:27,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306903520] [2024-06-21 17:58:27,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:27,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:27,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:27,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 149 transitions, 1480 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:27,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:27,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:27,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:28,031 INFO L124 PetriNetUnfolderBase]: 1684/2596 cut-off events. [2024-06-21 17:58:28,032 INFO L125 PetriNetUnfolderBase]: For 54362/54362 co-relation queries the response was YES. [2024-06-21 17:58:28,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15125 conditions, 2596 events. 1684/2596 cut-off events. For 54362/54362 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13060 event pairs, 461 based on Foata normal form. 4/2597 useless extension candidates. Maximal degree in co-relation 15076. Up to 2060 conditions per place. [2024-06-21 17:58:28,049 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 81 changer transitions 0/180 dead transitions. [2024-06-21 17:58:28,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 2029 flow [2024-06-21 17:58:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:58:28,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:58:28,050 INFO L175 Difference]: Start difference. First operand has 114 places, 149 transitions, 1480 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:58:28,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 2029 flow [2024-06-21 17:58:28,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 1734 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:28,093 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1356 flow [2024-06-21 17:58:28,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1356, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-21 17:58:28,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 17:58:28,093 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1356 flow [2024-06-21 17:58:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:28,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:28,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:28,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:58:28,094 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1686856468, now seen corresponding path program 7 times [2024-06-21 17:58:28,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:28,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558483547] [2024-06-21 17:58:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:28,626 INFO 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 17:58:28,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:28,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558483547] [2024-06-21 17:58:28,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558483547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:28,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:28,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455021732] [2024-06-21 17:58:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:28,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:28,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:28,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1356 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:28,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:28,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:28,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:29,249 INFO L124 PetriNetUnfolderBase]: 1674/2588 cut-off events. [2024-06-21 17:58:29,249 INFO L125 PetriNetUnfolderBase]: For 55098/55098 co-relation queries the response was YES. [2024-06-21 17:58:29,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14834 conditions, 2588 events. 1674/2588 cut-off events. For 55098/55098 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13048 event pairs, 472 based on Foata normal form. 4/2589 useless extension candidates. Maximal degree in co-relation 14785. Up to 2052 conditions per place. [2024-06-21 17:58:29,266 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 79 changer transitions 0/177 dead transitions. [2024-06-21 17:58:29,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1804 flow [2024-06-21 17:58:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:58:29,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:58:29,267 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1356 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:58:29,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1804 flow [2024-06-21 17:58:29,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1602 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:29,310 INFO L231 Difference]: Finished difference. Result has 116 places, 149 transitions, 1320 flow [2024-06-21 17:58:29,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=116, PETRI_TRANSITIONS=149} [2024-06-21 17:58:29,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-21 17:58:29,311 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 149 transitions, 1320 flow [2024-06-21 17:58:29,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:29,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:29,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:29,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:58:29,311 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:29,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:29,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1654426796, now seen corresponding path program 2 times [2024-06-21 17:58:29,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:29,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117792071] [2024-06-21 17:58:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:29,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:30,021 INFO 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 17:58:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:30,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117792071] [2024-06-21 17:58:30,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117792071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:30,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:30,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192018735] [2024-06-21 17:58:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:30,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:30,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 149 transitions, 1320 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:30,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:30,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:30,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:30,631 INFO L124 PetriNetUnfolderBase]: 1691/2624 cut-off events. [2024-06-21 17:58:30,631 INFO L125 PetriNetUnfolderBase]: For 59036/59036 co-relation queries the response was YES. [2024-06-21 17:58:30,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15087 conditions, 2624 events. 1691/2624 cut-off events. For 59036/59036 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 13321 event pairs, 479 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 15037. Up to 2312 conditions per place. [2024-06-21 17:58:30,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 123 selfloop transitions, 51 changer transitions 0/179 dead transitions. [2024-06-21 17:58:30,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1810 flow [2024-06-21 17:58:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:30,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:58:30,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 17:58:30,647 INFO L175 Difference]: Start difference. First operand has 116 places, 149 transitions, 1320 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:58:30,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1810 flow [2024-06-21 17:58:30,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 1641 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:30,682 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1299 flow [2024-06-21 17:58:30,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1151, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-21 17:58:30,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-21 17:58:30,683 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1299 flow [2024-06-21 17:58:30,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:30,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:30,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:30,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:58:30,683 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:30,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 197297010, now seen corresponding path program 3 times [2024-06-21 17:58:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:30,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55925612] [2024-06-21 17:58:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:31,458 INFO 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 17:58:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:31,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55925612] [2024-06-21 17:58:31,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55925612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:31,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:31,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:31,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309678804] [2024-06-21 17:58:31,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:31,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:31,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:31,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:31,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:31,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1299 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:31,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:31,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:31,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:32,036 INFO L124 PetriNetUnfolderBase]: 1708/2651 cut-off events. [2024-06-21 17:58:32,036 INFO L125 PetriNetUnfolderBase]: For 63973/63973 co-relation queries the response was YES. [2024-06-21 17:58:32,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15444 conditions, 2651 events. 1708/2651 cut-off events. For 63973/63973 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13526 event pairs, 452 based on Foata normal form. 4/2654 useless extension candidates. Maximal degree in co-relation 15393. Up to 2245 conditions per place. [2024-06-21 17:58:32,053 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/185 dead transitions. [2024-06-21 17:58:32,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 185 transitions, 1943 flow [2024-06-21 17:58:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:32,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:58:32,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:58:32,054 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1299 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:58:32,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 185 transitions, 1943 flow [2024-06-21 17:58:32,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1815 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:32,094 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1374 flow [2024-06-21 17:58:32,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1374, PETRI_PLACES=119, PETRI_TRANSITIONS=155} [2024-06-21 17:58:32,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-21 17:58:32,094 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1374 flow [2024-06-21 17:58:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:32,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:32,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:32,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:58:32,095 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:32,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:32,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1565628872, now seen corresponding path program 4 times [2024-06-21 17:58:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:32,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607473909] [2024-06-21 17:58:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:32,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:32,819 INFO 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 17:58:32,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:32,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607473909] [2024-06-21 17:58:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607473909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:32,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:32,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33771663] [2024-06-21 17:58:32,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:32,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:32,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:32,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:32,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:32,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:32,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 155 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:32,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:32,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:32,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:33,457 INFO L124 PetriNetUnfolderBase]: 1700/2641 cut-off events. [2024-06-21 17:58:33,458 INFO L125 PetriNetUnfolderBase]: For 67754/67754 co-relation queries the response was YES. [2024-06-21 17:58:33,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15580 conditions, 2641 events. 1700/2641 cut-off events. For 67754/67754 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13435 event pairs, 483 based on Foata normal form. 4/2644 useless extension candidates. Maximal degree in co-relation 15528. Up to 2327 conditions per place. [2024-06-21 17:58:33,476 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 129 selfloop transitions, 49 changer transitions 0/183 dead transitions. [2024-06-21 17:58:33,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 1832 flow [2024-06-21 17:58:33,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:58:33,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:58:33,477 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1374 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:58:33,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 1832 flow [2024-06-21 17:58:33,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 183 transitions, 1718 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:33,530 INFO L231 Difference]: Finished difference. Result has 123 places, 155 transitions, 1366 flow [2024-06-21 17:58:33,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=123, PETRI_TRANSITIONS=155} [2024-06-21 17:58:33,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-21 17:58:33,531 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 155 transitions, 1366 flow [2024-06-21 17:58:33,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:33,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:33,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:33,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:58:33,531 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:33,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1637389377, now seen corresponding path program 2 times [2024-06-21 17:58:33,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:33,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807397675] [2024-06-21 17:58:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:33,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:33,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807397675] [2024-06-21 17:58:33,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807397675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:33,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:33,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:33,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883392451] [2024-06-21 17:58:33,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:33,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:33,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:33,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:34,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:34,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 155 transitions, 1366 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:34,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:34,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:34,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:34,356 INFO L124 PetriNetUnfolderBase]: 1540/2455 cut-off events. [2024-06-21 17:58:34,356 INFO L125 PetriNetUnfolderBase]: For 68727/68739 co-relation queries the response was YES. [2024-06-21 17:58:34,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14526 conditions, 2455 events. 1540/2455 cut-off events. For 68727/68739 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12632 event pairs, 515 based on Foata normal form. 5/2438 useless extension candidates. Maximal degree in co-relation 14472. Up to 2192 conditions per place. [2024-06-21 17:58:34,371 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 115 selfloop transitions, 26 changer transitions 0/165 dead transitions. [2024-06-21 17:58:34,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 165 transitions, 1686 flow [2024-06-21 17:58:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:58:34,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:58:34,372 INFO L175 Difference]: Start difference. First operand has 123 places, 155 transitions, 1366 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:58:34,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 165 transitions, 1686 flow [2024-06-21 17:58:34,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 165 transitions, 1556 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:34,433 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1296 flow [2024-06-21 17:58:34,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1296, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-21 17:58:34,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 17:58:34,433 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1296 flow [2024-06-21 17:58:34,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:34,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:34,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:34,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:58:34,434 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:34,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:34,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1631682401, now seen corresponding path program 1 times [2024-06-21 17:58:34,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:34,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911430150] [2024-06-21 17:58:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:34,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:34,817 INFO 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 17:58:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911430150] [2024-06-21 17:58:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911430150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:34,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:34,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:34,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995828834] [2024-06-21 17:58:34,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:34,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:34,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:34,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1296 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 17:58:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:34,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:35,202 INFO L124 PetriNetUnfolderBase]: 1689/2630 cut-off events. [2024-06-21 17:58:35,202 INFO L125 PetriNetUnfolderBase]: For 72420/72420 co-relation queries the response was YES. [2024-06-21 17:58:35,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15572 conditions, 2630 events. 1689/2630 cut-off events. For 72420/72420 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13370 event pairs, 542 based on Foata normal form. 1/2631 useless extension candidates. Maximal degree in co-relation 15517. Up to 2503 conditions per place. [2024-06-21 17:58:35,220 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 154 selfloop transitions, 11 changer transitions 0/170 dead transitions. [2024-06-21 17:58:35,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1702 flow [2024-06-21 17:58:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:35,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:58:35,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:58:35,221 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1296 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:58:35,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1702 flow [2024-06-21 17:58:35,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 170 transitions, 1631 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:35,279 INFO L231 Difference]: Finished difference. Result has 123 places, 158 transitions, 1289 flow [2024-06-21 17:58:35,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1225, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1289, PETRI_PLACES=123, PETRI_TRANSITIONS=158} [2024-06-21 17:58:35,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-21 17:58:35,280 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 158 transitions, 1289 flow [2024-06-21 17:58:35,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 17:58:35,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:35,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:58:35,280 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:35,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1637396321, now seen corresponding path program 2 times [2024-06-21 17:58:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087564268] [2024-06-21 17:58:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:35,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:35,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:35,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087564268] [2024-06-21 17:58:35,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087564268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:35,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:35,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:58:35,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74062772] [2024-06-21 17:58:35,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:58:35,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:35,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:58:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:58:35,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:35,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 158 transitions, 1289 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 17:58:35,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:35,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:35,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:36,101 INFO L124 PetriNetUnfolderBase]: 1686/2627 cut-off events. [2024-06-21 17:58:36,102 INFO L125 PetriNetUnfolderBase]: For 76166/76168 co-relation queries the response was YES. [2024-06-21 17:58:36,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15840 conditions, 2627 events. 1686/2627 cut-off events. For 76166/76168 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13388 event pairs, 546 based on Foata normal form. 3/2630 useless extension candidates. Maximal degree in co-relation 15784. Up to 2493 conditions per place. [2024-06-21 17:58:36,119 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-21 17:58:36,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 170 transitions, 1687 flow [2024-06-21 17:58:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:58:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:58:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-21 17:58:36,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-21 17:58:36,120 INFO L175 Difference]: Start difference. First operand has 123 places, 158 transitions, 1289 flow. Second operand 6 states and 101 transitions. [2024-06-21 17:58:36,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 170 transitions, 1687 flow [2024-06-21 17:58:36,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 170 transitions, 1645 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:36,175 INFO L231 Difference]: Finished difference. Result has 125 places, 161 transitions, 1327 flow [2024-06-21 17:58:36,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1327, PETRI_PLACES=125, PETRI_TRANSITIONS=161} [2024-06-21 17:58:36,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-21 17:58:36,176 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 161 transitions, 1327 flow [2024-06-21 17:58:36,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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 17:58:36,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:36,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:36,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:58:36,176 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:36,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:36,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1466220949, now seen corresponding path program 1 times [2024-06-21 17:58:36,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:36,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478460457] [2024-06-21 17:58:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:36,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:36,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478460457] [2024-06-21 17:58:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478460457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888395210] [2024-06-21 17:58:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:36,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:36,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:36,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:36,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 161 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:36,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:36,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:36,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:37,118 INFO L124 PetriNetUnfolderBase]: 1560/2483 cut-off events. [2024-06-21 17:58:37,118 INFO L125 PetriNetUnfolderBase]: For 79373/79385 co-relation queries the response was YES. [2024-06-21 17:58:37,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15342 conditions, 2483 events. 1560/2483 cut-off events. For 79373/79385 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12785 event pairs, 512 based on Foata normal form. 4/2465 useless extension candidates. Maximal degree in co-relation 15285. Up to 2189 conditions per place. [2024-06-21 17:58:37,136 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-21 17:58:37,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 176 transitions, 1715 flow [2024-06-21 17:58:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:58:37,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:58:37,137 INFO L175 Difference]: Start difference. First operand has 125 places, 161 transitions, 1327 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:58:37,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 176 transitions, 1715 flow [2024-06-21 17:58:37,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 1657 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 17:58:37,199 INFO L231 Difference]: Finished difference. Result has 128 places, 165 transitions, 1390 flow [2024-06-21 17:58:37,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1269, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1390, PETRI_PLACES=128, PETRI_TRANSITIONS=165} [2024-06-21 17:58:37,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-21 17:58:37,199 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 165 transitions, 1390 flow [2024-06-21 17:58:37,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:37,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:37,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:37,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:58:37,199 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:37,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -572851680, now seen corresponding path program 1 times [2024-06-21 17:58:37,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:37,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188467487] [2024-06-21 17:58:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:37,746 INFO 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 17:58:37,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:37,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188467487] [2024-06-21 17:58:37,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188467487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:37,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:37,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:37,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535847782] [2024-06-21 17:58:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:37,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:37,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:37,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:37,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:37,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 165 transitions, 1390 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:37,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:37,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:37,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:38,353 INFO L124 PetriNetUnfolderBase]: 1735/2705 cut-off events. [2024-06-21 17:58:38,353 INFO L125 PetriNetUnfolderBase]: For 87783/87783 co-relation queries the response was YES. [2024-06-21 17:58:38,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17332 conditions, 2705 events. 1735/2705 cut-off events. For 87783/87783 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13858 event pairs, 366 based on Foata normal form. 4/2709 useless extension candidates. Maximal degree in co-relation 17274. Up to 2430 conditions per place. [2024-06-21 17:58:38,372 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 31 changer transitions 0/206 dead transitions. [2024-06-21 17:58:38,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 206 transitions, 2129 flow [2024-06-21 17:58:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:58:38,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 17:58:38,381 INFO L175 Difference]: Start difference. First operand has 128 places, 165 transitions, 1390 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:58:38,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 206 transitions, 2129 flow [2024-06-21 17:58:38,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 206 transitions, 2036 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:38,445 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1458 flow [2024-06-21 17:58:38,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1297, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1458, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-21 17:58:38,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-21 17:58:38,445 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1458 flow [2024-06-21 17:58:38,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:38,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:38,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:38,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:58:38,446 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:38,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1129353310, now seen corresponding path program 2 times [2024-06-21 17:58:38,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:38,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668195381] [2024-06-21 17:58:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:38,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:39,002 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 17:58:39,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:39,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668195381] [2024-06-21 17:58:39,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668195381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745014810] [2024-06-21 17:58:39,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:39,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:39,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:39,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:39,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:39,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:39,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1458 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:39,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:39,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:39,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:39,624 INFO L124 PetriNetUnfolderBase]: 1727/2693 cut-off events. [2024-06-21 17:58:39,625 INFO L125 PetriNetUnfolderBase]: For 91962/91962 co-relation queries the response was YES. [2024-06-21 17:58:39,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17429 conditions, 2693 events. 1727/2693 cut-off events. For 91962/91962 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13752 event pairs, 487 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17370. Up to 2483 conditions per place. [2024-06-21 17:58:39,644 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 27 changer transitions 0/199 dead transitions. [2024-06-21 17:58:39,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 199 transitions, 1963 flow [2024-06-21 17:58:39,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:58:39,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:58:39,646 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1458 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:58:39,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 199 transitions, 1963 flow [2024-06-21 17:58:39,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 199 transitions, 1854 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:39,714 INFO L231 Difference]: Finished difference. Result has 135 places, 169 transitions, 1412 flow [2024-06-21 17:58:39,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1412, PETRI_PLACES=135, PETRI_TRANSITIONS=169} [2024-06-21 17:58:39,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-21 17:58:39,715 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 169 transitions, 1412 flow [2024-06-21 17:58:39,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:39,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:39,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:39,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:58:39,715 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:39,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1014062140, now seen corresponding path program 3 times [2024-06-21 17:58:39,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:39,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695040348] [2024-06-21 17:58:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:40,229 INFO 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 17:58:40,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:40,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695040348] [2024-06-21 17:58:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695040348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:40,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:40,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660471437] [2024-06-21 17:58:40,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:40,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:40,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:40,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:40,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:40,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 169 transitions, 1412 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:40,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:40,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:40,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:40,833 INFO L124 PetriNetUnfolderBase]: 1744/2717 cut-off events. [2024-06-21 17:58:40,833 INFO L125 PetriNetUnfolderBase]: For 97981/97983 co-relation queries the response was YES. [2024-06-21 17:58:40,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17659 conditions, 2717 events. 1744/2717 cut-off events. For 97981/97983 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13900 event pairs, 478 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 17598. Up to 2449 conditions per place. [2024-06-21 17:58:40,852 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 151 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-06-21 17:58:40,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 200 transitions, 1967 flow [2024-06-21 17:58:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:40,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:58:40,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:58:40,853 INFO L175 Difference]: Start difference. First operand has 135 places, 169 transitions, 1412 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:58:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 200 transitions, 1967 flow [2024-06-21 17:58:40,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 200 transitions, 1907 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:40,944 INFO L231 Difference]: Finished difference. Result has 136 places, 171 transitions, 1499 flow [2024-06-21 17:58:40,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1499, PETRI_PLACES=136, PETRI_TRANSITIONS=171} [2024-06-21 17:58:40,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-21 17:58:40,944 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 171 transitions, 1499 flow [2024-06-21 17:58:40,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:40,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:40,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:40,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:58:40,945 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:40,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:40,945 INFO L85 PathProgramCache]: Analyzing trace with hash -165771132, now seen corresponding path program 4 times [2024-06-21 17:58:40,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:40,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007333415] [2024-06-21 17:58:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:40,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:41,490 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 17:58:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:41,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007333415] [2024-06-21 17:58:41,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007333415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:41,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:41,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:41,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521729864] [2024-06-21 17:58:41,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:41,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:41,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:41,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:41,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 171 transitions, 1499 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:41,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:41,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:41,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:42,084 INFO L124 PetriNetUnfolderBase]: 1736/2696 cut-off events. [2024-06-21 17:58:42,084 INFO L125 PetriNetUnfolderBase]: For 102141/102141 co-relation queries the response was YES. [2024-06-21 17:58:42,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17786 conditions, 2696 events. 1736/2696 cut-off events. For 102141/102141 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13703 event pairs, 480 based on Foata normal form. 4/2697 useless extension candidates. Maximal degree in co-relation 17724. Up to 2437 conditions per place. [2024-06-21 17:58:42,103 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 152 selfloop transitions, 43 changer transitions 0/200 dead transitions. [2024-06-21 17:58:42,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 200 transitions, 2050 flow [2024-06-21 17:58:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:42,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:58:42,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 17:58:42,104 INFO L175 Difference]: Start difference. First operand has 136 places, 171 transitions, 1499 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:58:42,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 200 transitions, 2050 flow [2024-06-21 17:58:42,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 200 transitions, 1921 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:42,185 INFO L231 Difference]: Finished difference. Result has 138 places, 173 transitions, 1519 flow [2024-06-21 17:58:42,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1519, PETRI_PLACES=138, PETRI_TRANSITIONS=173} [2024-06-21 17:58:42,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-21 17:58:42,186 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 173 transitions, 1519 flow [2024-06-21 17:58:42,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:42,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:42,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:42,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:58:42,186 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:42,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:42,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1708796360, now seen corresponding path program 1 times [2024-06-21 17:58:42,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:42,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110164881] [2024-06-21 17:58:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:42,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:42,597 INFO 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 17:58:42,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:42,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110164881] [2024-06-21 17:58:42,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110164881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:42,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:42,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:42,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973415316] [2024-06-21 17:58:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:42,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:42,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:42,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:42,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 173 transitions, 1519 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:42,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:42,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:42,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:43,066 INFO L124 PetriNetUnfolderBase]: 1746/2718 cut-off events. [2024-06-21 17:58:43,066 INFO L125 PetriNetUnfolderBase]: For 106900/106900 co-relation queries the response was YES. [2024-06-21 17:58:43,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18026 conditions, 2718 events. 1746/2718 cut-off events. For 106900/106900 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13858 event pairs, 475 based on Foata normal form. 2/2720 useless extension candidates. Maximal degree in co-relation 17963. Up to 2571 conditions per place. [2024-06-21 17:58:43,085 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 174 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-21 17:58:43,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 196 transitions, 2020 flow [2024-06-21 17:58:43,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:43,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:58:43,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 17:58:43,086 INFO L175 Difference]: Start difference. First operand has 138 places, 173 transitions, 1519 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:58:43,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 196 transitions, 2020 flow [2024-06-21 17:58:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 196 transitions, 1889 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:43,170 INFO L231 Difference]: Finished difference. Result has 140 places, 179 transitions, 1495 flow [2024-06-21 17:58:43,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1495, PETRI_PLACES=140, PETRI_TRANSITIONS=179} [2024-06-21 17:58:43,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-21 17:58:43,170 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 179 transitions, 1495 flow [2024-06-21 17:58:43,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:43,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:43,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:43,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:58:43,170 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:43,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -957451942, now seen corresponding path program 1 times [2024-06-21 17:58:43,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:43,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691691222] [2024-06-21 17:58:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:43,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:43,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691691222] [2024-06-21 17:58:43,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691691222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:43,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:43,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640021304] [2024-06-21 17:58:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:43,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:43,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 179 transitions, 1495 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:43,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:43,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:43,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:44,040 INFO L124 PetriNetUnfolderBase]: 1774/2740 cut-off events. [2024-06-21 17:58:44,041 INFO L125 PetriNetUnfolderBase]: For 112618/112618 co-relation queries the response was YES. [2024-06-21 17:58:44,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18677 conditions, 2740 events. 1774/2740 cut-off events. For 112618/112618 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13841 event pairs, 464 based on Foata normal form. 2/2741 useless extension candidates. Maximal degree in co-relation 18612. Up to 2555 conditions per place. [2024-06-21 17:58:44,062 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 35 changer transitions 0/203 dead transitions. [2024-06-21 17:58:44,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 203 transitions, 2131 flow [2024-06-21 17:58:44,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:44,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:58:44,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 17:58:44,063 INFO L175 Difference]: Start difference. First operand has 140 places, 179 transitions, 1495 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:58:44,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 203 transitions, 2131 flow [2024-06-21 17:58:44,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 203 transitions, 2081 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:44,138 INFO L231 Difference]: Finished difference. Result has 145 places, 187 transitions, 1652 flow [2024-06-21 17:58:44,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1652, PETRI_PLACES=145, PETRI_TRANSITIONS=187} [2024-06-21 17:58:44,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-21 17:58:44,139 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 187 transitions, 1652 flow [2024-06-21 17:58:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:44,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:44,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:58:44,139 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:44,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1708916330, now seen corresponding path program 2 times [2024-06-21 17:58:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:44,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121321565] [2024-06-21 17:58:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:44,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:44,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121321565] [2024-06-21 17:58:44,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121321565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:44,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:44,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035478859] [2024-06-21 17:58:44,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:44,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:44,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:44,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:44,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 187 transitions, 1652 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:44,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:44,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:44,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:45,040 INFO L124 PetriNetUnfolderBase]: 1792/2768 cut-off events. [2024-06-21 17:58:45,040 INFO L125 PetriNetUnfolderBase]: For 121814/121814 co-relation queries the response was YES. [2024-06-21 17:58:45,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19533 conditions, 2768 events. 1792/2768 cut-off events. For 121814/121814 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13961 event pairs, 481 based on Foata normal form. 2/2770 useless extension candidates. Maximal degree in co-relation 19466. Up to 2622 conditions per place. [2024-06-21 17:58:45,062 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 24 changer transitions 0/209 dead transitions. [2024-06-21 17:58:45,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 209 transitions, 2288 flow [2024-06-21 17:58:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:58:45,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 17:58:45,063 INFO L175 Difference]: Start difference. First operand has 145 places, 187 transitions, 1652 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:58:45,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 209 transitions, 2288 flow [2024-06-21 17:58:45,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 209 transitions, 2193 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:45,162 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 1713 flow [2024-06-21 17:58:45,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1713, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-21 17:58:45,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 17:58:45,162 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 1713 flow [2024-06-21 17:58:45,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:45,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:45,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:45,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:58:45,163 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:45,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:45,163 INFO L85 PathProgramCache]: Analyzing trace with hash -780083272, now seen corresponding path program 2 times [2024-06-21 17:58:45,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:45,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721230350] [2024-06-21 17:58:45,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:45,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:45,635 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 17:58:45,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:45,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721230350] [2024-06-21 17:58:45,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721230350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:45,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:45,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843538117] [2024-06-21 17:58:45,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:45,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:45,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 1713 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:45,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:45,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:45,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:46,030 INFO L124 PetriNetUnfolderBase]: 1810/2792 cut-off events. [2024-06-21 17:58:46,030 INFO L125 PetriNetUnfolderBase]: For 129473/129477 co-relation queries the response was YES. [2024-06-21 17:58:46,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20104 conditions, 2792 events. 1810/2792 cut-off events. For 129473/129477 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14076 event pairs, 475 based on Foata normal form. 6/2797 useless extension candidates. Maximal degree in co-relation 20035. Up to 2548 conditions per place. [2024-06-21 17:58:46,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 53 changer transitions 0/225 dead transitions. [2024-06-21 17:58:46,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 225 transitions, 2587 flow [2024-06-21 17:58:46,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:58:46,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 17:58:46,053 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 1713 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:58:46,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 225 transitions, 2587 flow [2024-06-21 17:58:46,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 225 transitions, 2525 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:46,177 INFO L231 Difference]: Finished difference. Result has 155 places, 210 transitions, 2057 flow [2024-06-21 17:58:46,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2057, PETRI_PLACES=155, PETRI_TRANSITIONS=210} [2024-06-21 17:58:46,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 17:58:46,177 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 210 transitions, 2057 flow [2024-06-21 17:58:46,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:46,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:46,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:46,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:58:46,178 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:46,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash -780320608, now seen corresponding path program 3 times [2024-06-21 17:58:46,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:46,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058097288] [2024-06-21 17:58:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:46,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:46,636 INFO 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 17:58:46,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:46,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058097288] [2024-06-21 17:58:46,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058097288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:46,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:46,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:46,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290889296] [2024-06-21 17:58:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:46,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:46,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:46,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:46,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 210 transitions, 2057 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:46,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:46,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:46,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:47,084 INFO L124 PetriNetUnfolderBase]: 1804/2789 cut-off events. [2024-06-21 17:58:47,084 INFO L125 PetriNetUnfolderBase]: For 137348/137350 co-relation queries the response was YES. [2024-06-21 17:58:47,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20724 conditions, 2789 events. 1804/2789 cut-off events. For 137348/137350 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14144 event pairs, 491 based on Foata normal form. 2/2791 useless extension candidates. Maximal degree in co-relation 20651. Up to 2627 conditions per place. [2024-06-21 17:58:47,107 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 190 selfloop transitions, 31 changer transitions 0/226 dead transitions. [2024-06-21 17:58:47,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 226 transitions, 2679 flow [2024-06-21 17:58:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:58:47,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 17:58:47,108 INFO L175 Difference]: Start difference. First operand has 155 places, 210 transitions, 2057 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:58:47,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 226 transitions, 2679 flow [2024-06-21 17:58:47,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 226 transitions, 2564 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 17:58:47,224 INFO L231 Difference]: Finished difference. Result has 160 places, 213 transitions, 2074 flow [2024-06-21 17:58:47,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2074, PETRI_PLACES=160, PETRI_TRANSITIONS=213} [2024-06-21 17:58:47,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 17:58:47,225 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 213 transitions, 2074 flow [2024-06-21 17:58:47,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:47,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:47,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:47,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:58:47,225 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:47,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash -780320422, now seen corresponding path program 3 times [2024-06-21 17:58:47,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:47,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585379463] [2024-06-21 17:58:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:47,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:47,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:47,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585379463] [2024-06-21 17:58:47,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585379463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:47,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:47,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:58:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484508803] [2024-06-21 17:58:47,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:47,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:58:47,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:47,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:58:47,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:58:47,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:47,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 213 transitions, 2074 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:47,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:47,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:47,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:48,158 INFO L124 PetriNetUnfolderBase]: 1800/2779 cut-off events. [2024-06-21 17:58:48,158 INFO L125 PetriNetUnfolderBase]: For 140263/140267 co-relation queries the response was YES. [2024-06-21 17:58:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20692 conditions, 2779 events. 1800/2779 cut-off events. For 140263/140267 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14111 event pairs, 474 based on Foata normal form. 6/2784 useless extension candidates. Maximal degree in co-relation 20617. Up to 2538 conditions per place. [2024-06-21 17:58:48,183 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-21 17:58:48,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2762 flow [2024-06-21 17:58:48,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:58:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:58:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:58:48,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 17:58:48,185 INFO L175 Difference]: Start difference. First operand has 160 places, 213 transitions, 2074 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:58:48,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2762 flow [2024-06-21 17:58:48,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 230 transitions, 2614 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:48,305 INFO L231 Difference]: Finished difference. Result has 163 places, 217 transitions, 2096 flow [2024-06-21 17:58:48,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1930, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2096, PETRI_PLACES=163, PETRI_TRANSITIONS=217} [2024-06-21 17:58:48,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 17:58:48,306 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 217 transitions, 2096 flow [2024-06-21 17:58:48,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:48,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:48,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:48,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:58:48,306 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:48,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash -780074344, now seen corresponding path program 1 times [2024-06-21 17:58:48,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:48,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429770855] [2024-06-21 17:58:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:48,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:49,010 INFO 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 17:58:49,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:49,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429770855] [2024-06-21 17:58:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429770855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:49,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:49,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:58:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811531067] [2024-06-21 17:58:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:49,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:58:49,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:58:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:58:49,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:58:49,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 217 transitions, 2096 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:49,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:49,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:58:49,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:49,534 INFO L124 PetriNetUnfolderBase]: 1713/2692 cut-off events. [2024-06-21 17:58:49,534 INFO L125 PetriNetUnfolderBase]: For 151924/151941 co-relation queries the response was YES. [2024-06-21 17:58:49,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20026 conditions, 2692 events. 1713/2692 cut-off events. For 151924/151941 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13709 event pairs, 455 based on Foata normal form. 13/2675 useless extension candidates. Maximal degree in co-relation 19949. Up to 2356 conditions per place. [2024-06-21 17:58:49,555 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 40 changer transitions 0/235 dead transitions. [2024-06-21 17:58:49,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 235 transitions, 2612 flow [2024-06-21 17:58:49,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:58:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:58:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:58:49,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:58:49,556 INFO L175 Difference]: Start difference. First operand has 163 places, 217 transitions, 2096 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:58:49,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 235 transitions, 2612 flow [2024-06-21 17:58:49,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 235 transitions, 2530 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:58:49,676 INFO L231 Difference]: Finished difference. Result has 168 places, 219 transitions, 2148 flow [2024-06-21 17:58:49,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2148, PETRI_PLACES=168, PETRI_TRANSITIONS=219} [2024-06-21 17:58:49,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-21 17:58:49,676 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 219 transitions, 2148 flow [2024-06-21 17:58:49,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:49,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:49,676 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 17:58:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:58:49,676 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:49,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash -509553147, now seen corresponding path program 1 times [2024-06-21 17:58:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287381514] [2024-06-21 17:58:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:50,254 INFO 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 17:58:50,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:50,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287381514] [2024-06-21 17:58:50,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287381514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:50,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:50,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:50,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113136434] [2024-06-21 17:58:50,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:50,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:50,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:50,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:50,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:50,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:50,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 219 transitions, 2148 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:50,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:50,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:50,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:50,998 INFO L124 PetriNetUnfolderBase]: 2000/3114 cut-off events. [2024-06-21 17:58:50,999 INFO L125 PetriNetUnfolderBase]: For 181115/181115 co-relation queries the response was YES. [2024-06-21 17:58:51,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23640 conditions, 3114 events. 2000/3114 cut-off events. For 181115/181115 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16389 event pairs, 392 based on Foata normal form. 16/3130 useless extension candidates. Maximal degree in co-relation 23562. Up to 2519 conditions per place. [2024-06-21 17:58:51,023 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 39 changer transitions 0/270 dead transitions. [2024-06-21 17:58:51,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 270 transitions, 3100 flow [2024-06-21 17:58:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:58:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:58:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-21 17:58:51,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-21 17:58:51,025 INFO L175 Difference]: Start difference. First operand has 168 places, 219 transitions, 2148 flow. Second operand 10 states and 187 transitions. [2024-06-21 17:58:51,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 270 transitions, 3100 flow [2024-06-21 17:58:51,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 270 transitions, 2994 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:51,153 INFO L231 Difference]: Finished difference. Result has 172 places, 221 transitions, 2200 flow [2024-06-21 17:58:51,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2042, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2200, PETRI_PLACES=172, PETRI_TRANSITIONS=221} [2024-06-21 17:58:51,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-21 17:58:51,154 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 221 transitions, 2200 flow [2024-06-21 17:58:51,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:51,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:51,155 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 17:58:51,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:58:51,155 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:51,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:51,155 INFO L85 PathProgramCache]: Analyzing trace with hash -650209709, now seen corresponding path program 2 times [2024-06-21 17:58:51,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:51,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294779703] [2024-06-21 17:58:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:51,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:51,749 INFO 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 17:58:51,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294779703] [2024-06-21 17:58:51,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294779703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:51,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:51,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228773211] [2024-06-21 17:58:51,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:51,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:51,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:51,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:51,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 221 transitions, 2200 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:51,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:51,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:51,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:52,509 INFO L124 PetriNetUnfolderBase]: 2050/3194 cut-off events. [2024-06-21 17:58:52,510 INFO L125 PetriNetUnfolderBase]: For 189230/189230 co-relation queries the response was YES. [2024-06-21 17:58:52,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24191 conditions, 3194 events. 2050/3194 cut-off events. For 189230/189230 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16831 event pairs, 528 based on Foata normal form. 20/3214 useless extension candidates. Maximal degree in co-relation 24112. Up to 2838 conditions per place. [2024-06-21 17:58:52,539 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 35 changer transitions 0/261 dead transitions. [2024-06-21 17:58:52,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 261 transitions, 2921 flow [2024-06-21 17:58:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 17:58:52,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:58:52,540 INFO L175 Difference]: Start difference. First operand has 172 places, 221 transitions, 2200 flow. Second operand 9 states and 164 transitions. [2024-06-21 17:58:52,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 261 transitions, 2921 flow [2024-06-21 17:58:52,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 261 transitions, 2844 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 17:58:52,706 INFO L231 Difference]: Finished difference. Result has 175 places, 222 transitions, 2244 flow [2024-06-21 17:58:52,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2244, PETRI_PLACES=175, PETRI_TRANSITIONS=222} [2024-06-21 17:58:52,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-21 17:58:52,707 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 222 transitions, 2244 flow [2024-06-21 17:58:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:52,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:52,707 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 17:58:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:58:52,707 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:52,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash -736905239, now seen corresponding path program 3 times [2024-06-21 17:58:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:52,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231081546] [2024-06-21 17:58:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231081546] [2024-06-21 17:58:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231081546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:53,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710781651] [2024-06-21 17:58:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:53,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:53,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 222 transitions, 2244 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:53,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:53,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:54,086 INFO L124 PetriNetUnfolderBase]: 2022/3152 cut-off events. [2024-06-21 17:58:54,087 INFO L125 PetriNetUnfolderBase]: For 183022/183022 co-relation queries the response was YES. [2024-06-21 17:58:54,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23391 conditions, 3152 events. 2022/3152 cut-off events. For 183022/183022 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16617 event pairs, 494 based on Foata normal form. 16/3168 useless extension candidates. Maximal degree in co-relation 23310. Up to 2676 conditions per place. [2024-06-21 17:58:54,114 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 36 changer transitions 0/264 dead transitions. [2024-06-21 17:58:54,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 264 transitions, 2950 flow [2024-06-21 17:58:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:58:54,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:58:54,116 INFO L175 Difference]: Start difference. First operand has 175 places, 222 transitions, 2244 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:58:54,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 264 transitions, 2950 flow [2024-06-21 17:58:54,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 264 transitions, 2855 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:54,309 INFO L231 Difference]: Finished difference. Result has 177 places, 222 transitions, 2227 flow [2024-06-21 17:58:54,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2149, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2227, PETRI_PLACES=177, PETRI_TRANSITIONS=222} [2024-06-21 17:58:54,309 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 17:58:54,309 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 222 transitions, 2227 flow [2024-06-21 17:58:54,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:54,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:54,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:58:54,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:58:54,309 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:54,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:54,310 INFO L85 PathProgramCache]: Analyzing trace with hash 93720437, now seen corresponding path program 4 times [2024-06-21 17:58:54,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:54,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652635390] [2024-06-21 17:58:54,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:54,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:54,889 INFO 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 17:58:54,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:54,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652635390] [2024-06-21 17:58:54,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652635390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:54,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:54,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:54,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072686903] [2024-06-21 17:58:54,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:54,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:54,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:54,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:54,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:54,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:54,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 222 transitions, 2227 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:54,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:54,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:54,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:55,761 INFO L124 PetriNetUnfolderBase]: 2097/3284 cut-off events. [2024-06-21 17:58:55,761 INFO L125 PetriNetUnfolderBase]: For 193486/193488 co-relation queries the response was YES. [2024-06-21 17:58:55,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24129 conditions, 3284 events. 2097/3284 cut-off events. For 193486/193488 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17620 event pairs, 492 based on Foata normal form. 20/3304 useless extension candidates. Maximal degree in co-relation 24047. Up to 2619 conditions per place. [2024-06-21 17:58:55,788 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 82 changer transitions 0/262 dead transitions. [2024-06-21 17:58:55,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 262 transitions, 2951 flow [2024-06-21 17:58:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:55,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 17:58:55,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-21 17:58:55,789 INFO L175 Difference]: Start difference. First operand has 177 places, 222 transitions, 2227 flow. Second operand 9 states and 173 transitions. [2024-06-21 17:58:55,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 262 transitions, 2951 flow [2024-06-21 17:58:55,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 262 transitions, 2853 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 17:58:55,987 INFO L231 Difference]: Finished difference. Result has 178 places, 223 transitions, 2340 flow [2024-06-21 17:58:55,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2340, PETRI_PLACES=178, PETRI_TRANSITIONS=223} [2024-06-21 17:58:55,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-21 17:58:55,987 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 223 transitions, 2340 flow [2024-06-21 17:58:55,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:55,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:55,987 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 17:58:55,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:58:55,988 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:55,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:55,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1371154455, now seen corresponding path program 5 times [2024-06-21 17:58:55,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:55,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303009823] [2024-06-21 17:58:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:55,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:56,555 INFO 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 17:58:56,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:56,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303009823] [2024-06-21 17:58:56,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303009823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:56,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:56,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:56,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125691966] [2024-06-21 17:58:56,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:56,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:56,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:56,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 223 transitions, 2340 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:56,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:56,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:56,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:57,429 INFO L124 PetriNetUnfolderBase]: 2266/3573 cut-off events. [2024-06-21 17:58:57,430 INFO L125 PetriNetUnfolderBase]: For 220746/220748 co-relation queries the response was YES. [2024-06-21 17:58:57,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26949 conditions, 3573 events. 2266/3573 cut-off events. For 220746/220748 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19660 event pairs, 511 based on Foata normal form. 16/3589 useless extension candidates. Maximal degree in co-relation 26866. Up to 2622 conditions per place. [2024-06-21 17:58:57,460 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 179 selfloop transitions, 85 changer transitions 0/269 dead transitions. [2024-06-21 17:58:57,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 269 transitions, 3298 flow [2024-06-21 17:58:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:58:57,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-21 17:58:57,462 INFO L175 Difference]: Start difference. First operand has 178 places, 223 transitions, 2340 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:58:57,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 269 transitions, 3298 flow [2024-06-21 17:58:57,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 269 transitions, 3113 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:58:57,687 INFO L231 Difference]: Finished difference. Result has 180 places, 225 transitions, 2413 flow [2024-06-21 17:58:57,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2155, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2413, PETRI_PLACES=180, PETRI_TRANSITIONS=225} [2024-06-21 17:58:57,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-21 17:58:57,687 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 225 transitions, 2413 flow [2024-06-21 17:58:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:57,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:57,687 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 17:58:57,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:58:57,688 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:57,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash 211483585, now seen corresponding path program 6 times [2024-06-21 17:58:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363429773] [2024-06-21 17:58:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:57,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:58:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:58:58,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:58:58,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363429773] [2024-06-21 17:58:58,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363429773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:58:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:58:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:58:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590442304] [2024-06-21 17:58:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:58:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:58:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:58:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:58:58,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:58:58,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:58:58,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 225 transitions, 2413 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:58,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:58:58,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:58:58,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:58:59,171 INFO L124 PetriNetUnfolderBase]: 2230/3508 cut-off events. [2024-06-21 17:58:59,171 INFO L125 PetriNetUnfolderBase]: For 213981/213983 co-relation queries the response was YES. [2024-06-21 17:58:59,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25833 conditions, 3508 events. 2230/3508 cut-off events. For 213981/213983 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19184 event pairs, 501 based on Foata normal form. 20/3528 useless extension candidates. Maximal degree in co-relation 25749. Up to 2842 conditions per place. [2024-06-21 17:58:59,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 83 changer transitions 0/265 dead transitions. [2024-06-21 17:58:59,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 265 transitions, 3112 flow [2024-06-21 17:58:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:58:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:58:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:58:59,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 17:58:59,207 INFO L175 Difference]: Start difference. First operand has 180 places, 225 transitions, 2413 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:58:59,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 265 transitions, 3112 flow [2024-06-21 17:58:59,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 265 transitions, 2963 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 17:58:59,478 INFO L231 Difference]: Finished difference. Result has 184 places, 225 transitions, 2437 flow [2024-06-21 17:58:59,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2437, PETRI_PLACES=184, PETRI_TRANSITIONS=225} [2024-06-21 17:58:59,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-21 17:58:59,478 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 225 transitions, 2437 flow [2024-06-21 17:58:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:58:59,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:58:59,478 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 17:58:59,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:58:59,478 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:58:59,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:58:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash -822086481, now seen corresponding path program 1 times [2024-06-21 17:58:59,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:58:59,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424323409] [2024-06-21 17:58:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:58:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:58:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:00,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:00,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:00,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424323409] [2024-06-21 17:59:00,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424323409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:00,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:00,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511069075] [2024-06-21 17:59:00,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:00,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:00,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:00,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:00,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:00,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:00,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 225 transitions, 2437 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:00,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:00,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:00,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:01,266 INFO L124 PetriNetUnfolderBase]: 2271/3574 cut-off events. [2024-06-21 17:59:01,266 INFO L125 PetriNetUnfolderBase]: For 212155/212157 co-relation queries the response was YES. [2024-06-21 17:59:01,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26325 conditions, 3574 events. 2271/3574 cut-off events. For 212155/212157 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19768 event pairs, 497 based on Foata normal form. 12/3586 useless extension candidates. Maximal degree in co-relation 26239. Up to 2554 conditions per place. [2024-06-21 17:59:01,297 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 178 selfloop transitions, 85 changer transitions 0/268 dead transitions. [2024-06-21 17:59:01,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 268 transitions, 3198 flow [2024-06-21 17:59:01,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:01,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:59:01,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-21 17:59:01,298 INFO L175 Difference]: Start difference. First operand has 184 places, 225 transitions, 2437 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:59:01,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 268 transitions, 3198 flow [2024-06-21 17:59:01,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 268 transitions, 3022 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:01,533 INFO L231 Difference]: Finished difference. Result has 185 places, 226 transitions, 2481 flow [2024-06-21 17:59:01,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2481, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2024-06-21 17:59:01,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-21 17:59:01,533 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 2481 flow [2024-06-21 17:59:01,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:01,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:01,534 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 17:59:01,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:59:01,534 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1045999512, now seen corresponding path program 1 times [2024-06-21 17:59:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083579684] [2024-06-21 17:59:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:01,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:01,939 INFO 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 17:59:01,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:01,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083579684] [2024-06-21 17:59:01,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083579684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:01,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:01,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:01,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221614488] [2024-06-21 17:59:01,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:01,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:01,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:01,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:01,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:01,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:01,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 2481 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:01,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:01,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:01,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:02,594 INFO L124 PetriNetUnfolderBase]: 2276/3591 cut-off events. [2024-06-21 17:59:02,595 INFO L125 PetriNetUnfolderBase]: For 209159/209163 co-relation queries the response was YES. [2024-06-21 17:59:02,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26584 conditions, 3591 events. 2276/3591 cut-off events. For 209159/209163 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19786 event pairs, 592 based on Foata normal form. 5/3596 useless extension candidates. Maximal degree in co-relation 26497. Up to 3409 conditions per place. [2024-06-21 17:59:02,625 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 29 changer transitions 0/249 dead transitions. [2024-06-21 17:59:02,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 249 transitions, 3103 flow [2024-06-21 17:59:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:59:02,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:59:02,626 INFO L175 Difference]: Start difference. First operand has 185 places, 226 transitions, 2481 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:59:02,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 249 transitions, 3103 flow [2024-06-21 17:59:02,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 249 transitions, 2903 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:02,907 INFO L231 Difference]: Finished difference. Result has 185 places, 229 transitions, 2407 flow [2024-06-21 17:59:02,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2281, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2407, PETRI_PLACES=185, PETRI_TRANSITIONS=229} [2024-06-21 17:59:02,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-21 17:59:02,908 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 229 transitions, 2407 flow [2024-06-21 17:59:02,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:02,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:02,909 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 17:59:02,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:59:02,909 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:02,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1040285592, now seen corresponding path program 2 times [2024-06-21 17:59:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:02,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6612475] [2024-06-21 17:59:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:02,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:02,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:03,360 INFO 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 17:59:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:03,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6612475] [2024-06-21 17:59:03,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6612475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:03,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:03,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162802551] [2024-06-21 17:59:03,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:03,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:03,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 229 transitions, 2407 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:03,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:03,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:03,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:03,961 INFO L124 PetriNetUnfolderBase]: 2289/3612 cut-off events. [2024-06-21 17:59:03,961 INFO L125 PetriNetUnfolderBase]: For 215235/215239 co-relation queries the response was YES. [2024-06-21 17:59:03,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26455 conditions, 3612 events. 2289/3612 cut-off events. For 215235/215239 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19985 event pairs, 593 based on Foata normal form. 5/3617 useless extension candidates. Maximal degree in co-relation 26367. Up to 3413 conditions per place. [2024-06-21 17:59:03,992 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 36 changer transitions 0/253 dead transitions. [2024-06-21 17:59:03,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 253 transitions, 3183 flow [2024-06-21 17:59:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:03,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 17:59:03,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 17:59:03,993 INFO L175 Difference]: Start difference. First operand has 185 places, 229 transitions, 2407 flow. Second operand 7 states and 122 transitions. [2024-06-21 17:59:03,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 253 transitions, 3183 flow [2024-06-21 17:59:04,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 253 transitions, 3107 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:04,294 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 2557 flow [2024-06-21 17:59:04,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2557, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-06-21 17:59:04,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-21 17:59:04,295 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 2557 flow [2024-06-21 17:59:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:04,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:04,295 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 17:59:04,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:59:04,295 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:04,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:04,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1039366915, now seen corresponding path program 7 times [2024-06-21 17:59:04,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:04,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899889688] [2024-06-21 17:59:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:04,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:04,872 INFO 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 17:59:04,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:04,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899889688] [2024-06-21 17:59:04,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899889688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:04,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896373578] [2024-06-21 17:59:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:04,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:04,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 2557 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:04,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:04,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:04,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:05,749 INFO L124 PetriNetUnfolderBase]: 2364/3731 cut-off events. [2024-06-21 17:59:05,750 INFO L125 PetriNetUnfolderBase]: For 244946/244946 co-relation queries the response was YES. [2024-06-21 17:59:05,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27506 conditions, 3731 events. 2364/3731 cut-off events. For 244946/244946 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20811 event pairs, 512 based on Foata normal form. 20/3748 useless extension candidates. Maximal degree in co-relation 27416. Up to 3063 conditions per place. [2024-06-21 17:59:05,785 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 84 changer transitions 0/275 dead transitions. [2024-06-21 17:59:05,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 275 transitions, 3312 flow [2024-06-21 17:59:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:05,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:59:05,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 17:59:05,788 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 2557 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:59:05,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 275 transitions, 3312 flow [2024-06-21 17:59:06,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 275 transitions, 3236 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:06,089 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 2702 flow [2024-06-21 17:59:06,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2702, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-21 17:59:06,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 17:59:06,089 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 2702 flow [2024-06-21 17:59:06,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:06,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:06,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:06,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:59:06,090 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:06,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:06,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1488554557, now seen corresponding path program 8 times [2024-06-21 17:59:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:06,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426665138] [2024-06-21 17:59:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:06,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426665138] [2024-06-21 17:59:06,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426665138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:06,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:06,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:06,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022691822] [2024-06-21 17:59:06,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:06,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:06,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:06,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:06,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 2702 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:06,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:06,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:06,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:07,546 INFO L124 PetriNetUnfolderBase]: 2439/3864 cut-off events. [2024-06-21 17:59:07,547 INFO L125 PetriNetUnfolderBase]: For 259832/259832 co-relation queries the response was YES. [2024-06-21 17:59:07,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28870 conditions, 3864 events. 2439/3864 cut-off events. For 259832/259832 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21847 event pairs, 539 based on Foata normal form. 20/3881 useless extension candidates. Maximal degree in co-relation 28779. Up to 3188 conditions per place. [2024-06-21 17:59:07,583 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 79 changer transitions 0/277 dead transitions. [2024-06-21 17:59:07,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 3470 flow [2024-06-21 17:59:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 17:59:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-21 17:59:07,584 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 2702 flow. Second operand 9 states and 169 transitions. [2024-06-21 17:59:07,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 3470 flow [2024-06-21 17:59:07,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 277 transitions, 3275 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:07,865 INFO L231 Difference]: Finished difference. Result has 195 places, 238 transitions, 2720 flow [2024-06-21 17:59:07,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2720, PETRI_PLACES=195, PETRI_TRANSITIONS=238} [2024-06-21 17:59:07,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 17:59:07,866 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 238 transitions, 2720 flow [2024-06-21 17:59:07,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:07,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:07,866 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 17:59:07,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:59:07,866 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:07,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:07,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1289252767, now seen corresponding path program 9 times [2024-06-21 17:59:07,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:07,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171286975] [2024-06-21 17:59:07,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:07,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:08,450 INFO 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 17:59:08,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:08,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171286975] [2024-06-21 17:59:08,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171286975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:08,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:08,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:08,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092145476] [2024-06-21 17:59:08,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:08,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:08,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 238 transitions, 2720 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:08,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:08,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:08,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:09,342 INFO L124 PetriNetUnfolderBase]: 2514/3996 cut-off events. [2024-06-21 17:59:09,342 INFO L125 PetriNetUnfolderBase]: For 271017/271017 co-relation queries the response was YES. [2024-06-21 17:59:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29663 conditions, 3996 events. 2514/3996 cut-off events. For 271017/271017 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22789 event pairs, 564 based on Foata normal form. 20/4013 useless extension candidates. Maximal degree in co-relation 29571. Up to 3313 conditions per place. [2024-06-21 17:59:09,445 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 82 changer transitions 0/276 dead transitions. [2024-06-21 17:59:09,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 276 transitions, 3474 flow [2024-06-21 17:59:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:59:09,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:59:09,446 INFO L175 Difference]: Start difference. First operand has 195 places, 238 transitions, 2720 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:59:09,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 276 transitions, 3474 flow [2024-06-21 17:59:09,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 276 transitions, 3287 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:09,722 INFO L231 Difference]: Finished difference. Result has 197 places, 239 transitions, 2754 flow [2024-06-21 17:59:09,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2754, PETRI_PLACES=197, PETRI_TRANSITIONS=239} [2024-06-21 17:59:09,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-21 17:59:09,723 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 239 transitions, 2754 flow [2024-06-21 17:59:09,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:09,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:09,723 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 17:59:09,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:59:09,723 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:09,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1289104897, now seen corresponding path program 10 times [2024-06-21 17:59:09,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:09,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340761771] [2024-06-21 17:59:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:09,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:09,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340761771] [2024-06-21 17:59:10,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340761771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:10,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:10,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:59:10,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076883771] [2024-06-21 17:59:10,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:10,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:59:10,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:59:10,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:59:10,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:10,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 239 transitions, 2754 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:10,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:10,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:10,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:11,267 INFO L124 PetriNetUnfolderBase]: 2522/4016 cut-off events. [2024-06-21 17:59:11,267 INFO L125 PetriNetUnfolderBase]: For 265555/265555 co-relation queries the response was YES. [2024-06-21 17:59:11,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29346 conditions, 4016 events. 2522/4016 cut-off events. For 265555/265555 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23001 event pairs, 546 based on Foata normal form. 16/4029 useless extension candidates. Maximal degree in co-relation 29253. Up to 2983 conditions per place. [2024-06-21 17:59:11,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 189 selfloop transitions, 86 changer transitions 0/280 dead transitions. [2024-06-21 17:59:11,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 280 transitions, 3536 flow [2024-06-21 17:59:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:59:11,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:59:11,310 INFO L175 Difference]: Start difference. First operand has 197 places, 239 transitions, 2754 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:59:11,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 280 transitions, 3536 flow [2024-06-21 17:59:11,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 280 transitions, 3341 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:11,687 INFO L231 Difference]: Finished difference. Result has 199 places, 240 transitions, 2789 flow [2024-06-21 17:59:11,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2789, PETRI_PLACES=199, PETRI_TRANSITIONS=240} [2024-06-21 17:59:11,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 17:59:11,688 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 240 transitions, 2789 flow [2024-06-21 17:59:11,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:11,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:11,688 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 17:59:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:59:11,688 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:11,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1114933989, now seen corresponding path program 2 times [2024-06-21 17:59:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945888485] [2024-06-21 17:59:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:11,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:12,424 INFO 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 17:59:12,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:12,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945888485] [2024-06-21 17:59:12,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945888485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:12,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:12,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:12,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975983084] [2024-06-21 17:59:12,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:12,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:12,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:12,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:12,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:12,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 240 transitions, 2789 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:13,348 INFO L124 PetriNetUnfolderBase]: 2563/4087 cut-off events. [2024-06-21 17:59:13,349 INFO L125 PetriNetUnfolderBase]: For 269318/269318 co-relation queries the response was YES. [2024-06-21 17:59:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29806 conditions, 4087 events. 2563/4087 cut-off events. For 269318/269318 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23637 event pairs, 558 based on Foata normal form. 12/4096 useless extension candidates. Maximal degree in co-relation 29712. Up to 3314 conditions per place. [2024-06-21 17:59:13,385 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 85 changer transitions 0/282 dead transitions. [2024-06-21 17:59:13,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 282 transitions, 3588 flow [2024-06-21 17:59:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 17:59:13,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 17:59:13,386 INFO L175 Difference]: Start difference. First operand has 199 places, 240 transitions, 2789 flow. Second operand 9 states and 168 transitions. [2024-06-21 17:59:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 282 transitions, 3588 flow [2024-06-21 17:59:13,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 282 transitions, 3376 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:13,730 INFO L231 Difference]: Finished difference. Result has 201 places, 241 transitions, 2807 flow [2024-06-21 17:59:13,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2807, PETRI_PLACES=201, PETRI_TRANSITIONS=241} [2024-06-21 17:59:13,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 17:59:13,731 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 241 transitions, 2807 flow [2024-06-21 17:59:13,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:13,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:13,731 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 17:59:13,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:59:13,732 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:13,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:13,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1496179069, now seen corresponding path program 3 times [2024-06-21 17:59:13,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:13,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313894681] [2024-06-21 17:59:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:13,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313894681] [2024-06-21 17:59:14,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313894681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:14,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:14,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:14,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119694592] [2024-06-21 17:59:14,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:14,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:14,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:14,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:14,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:14,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 241 transitions, 2807 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:14,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:14,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:14,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:15,502 INFO L124 PetriNetUnfolderBase]: 2604/4166 cut-off events. [2024-06-21 17:59:15,503 INFO L125 PetriNetUnfolderBase]: For 277699/277699 co-relation queries the response was YES. [2024-06-21 17:59:15,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30176 conditions, 4166 events. 2604/4166 cut-off events. For 277699/277699 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24271 event pairs, 585 based on Foata normal form. 12/4175 useless extension candidates. Maximal degree in co-relation 30081. Up to 3265 conditions per place. [2024-06-21 17:59:15,543 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-21 17:59:15,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 283 transitions, 3609 flow [2024-06-21 17:59:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:59:15,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 17:59:15,544 INFO L175 Difference]: Start difference. First operand has 201 places, 241 transitions, 2807 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:59:15,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 283 transitions, 3609 flow [2024-06-21 17:59:15,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 283 transitions, 3399 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:15,914 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2821 flow [2024-06-21 17:59:15,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2821, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-21 17:59:15,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 17:59:15,915 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2821 flow [2024-06-21 17:59:15,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:15,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:15,915 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 17:59:15,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:59:15,915 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:15,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -553073381, now seen corresponding path program 4 times [2024-06-21 17:59:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:15,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564260990] [2024-06-21 17:59:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:16,677 INFO 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 17:59:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564260990] [2024-06-21 17:59:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564260990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:16,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:16,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:59:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455454343] [2024-06-21 17:59:16,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:59:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:59:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:59:16,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:16,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2821 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:16,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:16,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:16,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:17,592 INFO L124 PetriNetUnfolderBase]: 2584/4136 cut-off events. [2024-06-21 17:59:17,592 INFO L125 PetriNetUnfolderBase]: For 269217/269217 co-relation queries the response was YES. [2024-06-21 17:59:17,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29271 conditions, 4136 events. 2584/4136 cut-off events. For 269217/269217 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24081 event pairs, 509 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 29175. Up to 2434 conditions per place. [2024-06-21 17:59:17,633 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 96 changer transitions 0/281 dead transitions. [2024-06-21 17:59:17,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 281 transitions, 3474 flow [2024-06-21 17:59:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:59:17,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 17:59:17,635 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2821 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:59:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 281 transitions, 3474 flow [2024-06-21 17:59:17,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 281 transitions, 3270 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 17:59:17,989 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 2729 flow [2024-06-21 17:59:17,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2729, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-06-21 17:59:17,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 17:59:17,990 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 2729 flow [2024-06-21 17:59:17,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:17,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:17,990 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 17:59:17,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:59:17,990 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:17,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1792858836, now seen corresponding path program 3 times [2024-06-21 17:59:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072477709] [2024-06-21 17:59:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:17,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:18,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:18,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:18,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072477709] [2024-06-21 17:59:18,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072477709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:18,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:18,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:18,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197109386] [2024-06-21 17:59:18,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:18,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:18,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:18,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 2729 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:18,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:18,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:18,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:19,103 INFO L124 PetriNetUnfolderBase]: 2581/4130 cut-off events. [2024-06-21 17:59:19,103 INFO L125 PetriNetUnfolderBase]: For 260198/260198 co-relation queries the response was YES. [2024-06-21 17:59:19,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29234 conditions, 4130 events. 2581/4130 cut-off events. For 260198/260198 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 24074 event pairs, 676 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 29137. Up to 3930 conditions per place. [2024-06-21 17:59:19,143 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 225 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-06-21 17:59:19,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 259 transitions, 3309 flow [2024-06-21 17:59:19,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:59:19,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:59:19,145 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 2729 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:59:19,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 259 transitions, 3309 flow [2024-06-21 17:59:19,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 259 transitions, 2960 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-21 17:59:19,470 INFO L231 Difference]: Finished difference. Result has 202 places, 241 transitions, 2445 flow [2024-06-21 17:59:19,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2445, PETRI_PLACES=202, PETRI_TRANSITIONS=241} [2024-06-21 17:59:19,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-21 17:59:19,471 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 241 transitions, 2445 flow [2024-06-21 17:59:19,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:19,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:19,471 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 17:59:19,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:59:19,472 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:19,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1424768664, now seen corresponding path program 4 times [2024-06-21 17:59:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135347123] [2024-06-21 17:59:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:19,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:19,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135347123] [2024-06-21 17:59:19,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135347123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:19,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:19,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:19,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463007660] [2024-06-21 17:59:19,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:19,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:19,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:19,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 241 transitions, 2445 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:19,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:19,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:19,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:20,572 INFO L124 PetriNetUnfolderBase]: 2573/4117 cut-off events. [2024-06-21 17:59:20,572 INFO L125 PetriNetUnfolderBase]: For 260586/260586 co-relation queries the response was YES. [2024-06-21 17:59:20,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27998 conditions, 4117 events. 2573/4117 cut-off events. For 260586/260586 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 23968 event pairs, 674 based on Foata normal form. 2/4118 useless extension candidates. Maximal degree in co-relation 27902. Up to 3893 conditions per place. [2024-06-21 17:59:20,610 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 39 changer transitions 0/256 dead transitions. [2024-06-21 17:59:20,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 256 transitions, 3007 flow [2024-06-21 17:59:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:59:20,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:59:20,612 INFO L175 Difference]: Start difference. First operand has 202 places, 241 transitions, 2445 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:59:20,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 256 transitions, 3007 flow [2024-06-21 17:59:20,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 256 transitions, 2899 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:20,949 INFO L231 Difference]: Finished difference. Result has 203 places, 241 transitions, 2423 flow [2024-06-21 17:59:20,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2337, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2423, PETRI_PLACES=203, PETRI_TRANSITIONS=241} [2024-06-21 17:59:20,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-21 17:59:20,950 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 241 transitions, 2423 flow [2024-06-21 17:59:20,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:20,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:20,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:59:20,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:59:20,951 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:20,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1573370274, now seen corresponding path program 5 times [2024-06-21 17:59:20,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:20,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024188321] [2024-06-21 17:59:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:21,410 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 17:59:21,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:21,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024188321] [2024-06-21 17:59:21,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024188321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:21,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:21,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:21,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804768874] [2024-06-21 17:59:21,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:21,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:21,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:21,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:21,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:21,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 241 transitions, 2423 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:21,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:21,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:21,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:22,048 INFO L124 PetriNetUnfolderBase]: 2583/4131 cut-off events. [2024-06-21 17:59:22,049 INFO L125 PetriNetUnfolderBase]: For 268161/268165 co-relation queries the response was YES. [2024-06-21 17:59:22,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28007 conditions, 4131 events. 2583/4131 cut-off events. For 268161/268165 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 24037 event pairs, 687 based on Foata normal form. 6/4136 useless extension candidates. Maximal degree in co-relation 27911. Up to 3846 conditions per place. [2024-06-21 17:59:22,086 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 61 changer transitions 0/257 dead transitions. [2024-06-21 17:59:22,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 257 transitions, 3146 flow [2024-06-21 17:59:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:22,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:59:22,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 17:59:22,087 INFO L175 Difference]: Start difference. First operand has 203 places, 241 transitions, 2423 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:59:22,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 257 transitions, 3146 flow [2024-06-21 17:59:22,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 257 transitions, 3039 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:22,529 INFO L231 Difference]: Finished difference. Result has 204 places, 245 transitions, 2506 flow [2024-06-21 17:59:22,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2506, PETRI_PLACES=204, PETRI_TRANSITIONS=245} [2024-06-21 17:59:22,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-21 17:59:22,529 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 245 transitions, 2506 flow [2024-06-21 17:59:22,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:22,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:22,530 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 17:59:22,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:59:22,530 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:22,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:22,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1390122334, now seen corresponding path program 6 times [2024-06-21 17:59:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:22,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431132334] [2024-06-21 17:59:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:22,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:22,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431132334] [2024-06-21 17:59:22,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431132334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:22,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:22,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374179833] [2024-06-21 17:59:22,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:22,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:22,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:22,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:22,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:23,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:23,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 245 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:23,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:23,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:23,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:23,629 INFO L124 PetriNetUnfolderBase]: 2575/4132 cut-off events. [2024-06-21 17:59:23,629 INFO L125 PetriNetUnfolderBase]: For 272422/272426 co-relation queries the response was YES. [2024-06-21 17:59:23,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28004 conditions, 4132 events. 2575/4132 cut-off events. For 272422/272426 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24063 event pairs, 692 based on Foata normal form. 6/4137 useless extension candidates. Maximal degree in co-relation 27907. Up to 3838 conditions per place. [2024-06-21 17:59:23,669 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 65 changer transitions 0/256 dead transitions. [2024-06-21 17:59:23,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 256 transitions, 3048 flow [2024-06-21 17:59:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:23,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:59:23,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:59:23,670 INFO L175 Difference]: Start difference. First operand has 204 places, 245 transitions, 2506 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:59:23,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 256 transitions, 3048 flow [2024-06-21 17:59:24,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 256 transitions, 2903 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:24,146 INFO L231 Difference]: Finished difference. Result has 207 places, 245 transitions, 2498 flow [2024-06-21 17:59:24,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2498, PETRI_PLACES=207, PETRI_TRANSITIONS=245} [2024-06-21 17:59:24,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 17:59:24,147 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 245 transitions, 2498 flow [2024-06-21 17:59:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:24,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:24,147 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 17:59:24,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:59:24,147 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:24,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1587483520, now seen corresponding path program 1 times [2024-06-21 17:59:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536821127] [2024-06-21 17:59:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:24,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536821127] [2024-06-21 17:59:24,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536821127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:24,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:24,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:59:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522662959] [2024-06-21 17:59:24,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:24,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:59:24,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:59:24,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:59:24,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 17:59:24,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 245 transitions, 2498 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:24,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:24,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 17:59:24,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:25,401 INFO L124 PetriNetUnfolderBase]: 2419/3921 cut-off events. [2024-06-21 17:59:25,401 INFO L125 PetriNetUnfolderBase]: For 275607/275624 co-relation queries the response was YES. [2024-06-21 17:59:25,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26864 conditions, 3921 events. 2419/3921 cut-off events. For 275607/275624 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 22966 event pairs, 644 based on Foata normal form. 3/3866 useless extension candidates. Maximal degree in co-relation 26766. Up to 3575 conditions per place. [2024-06-21 17:59:25,439 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 185 selfloop transitions, 39 changer transitions 0/260 dead transitions. [2024-06-21 17:59:25,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 260 transitions, 3022 flow [2024-06-21 17:59:25,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:25,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:59:25,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:59:25,440 INFO L175 Difference]: Start difference. First operand has 207 places, 245 transitions, 2498 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:59:25,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 260 transitions, 3022 flow [2024-06-21 17:59:25,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 260 transitions, 2801 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 17:59:25,750 INFO L231 Difference]: Finished difference. Result has 207 places, 248 transitions, 2403 flow [2024-06-21 17:59:25,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2403, PETRI_PLACES=207, PETRI_TRANSITIONS=248} [2024-06-21 17:59:25,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-21 17:59:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 248 transitions, 2403 flow [2024-06-21 17:59:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:25,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:25,751 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 17:59:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:59:25,751 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:25,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1433076912, now seen corresponding path program 1 times [2024-06-21 17:59:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:25,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129209919] [2024-06-21 17:59:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:26,435 INFO 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 17:59:26,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:26,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129209919] [2024-06-21 17:59:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129209919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:26,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:26,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507579608] [2024-06-21 17:59:26,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:26,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:26,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:26,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:26,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 248 transitions, 2403 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:26,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:26,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:26,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:27,306 INFO L124 PetriNetUnfolderBase]: 2566/4123 cut-off events. [2024-06-21 17:59:27,306 INFO L125 PetriNetUnfolderBase]: For 280069/280069 co-relation queries the response was YES. [2024-06-21 17:59:27,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28145 conditions, 4123 events. 2566/4123 cut-off events. For 280069/280069 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24039 event pairs, 693 based on Foata normal form. 1/4124 useless extension candidates. Maximal degree in co-relation 28047. Up to 3939 conditions per place. [2024-06-21 17:59:27,346 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 241 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-21 17:59:27,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 265 transitions, 2989 flow [2024-06-21 17:59:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:59:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:59:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:59:27,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 17:59:27,347 INFO L175 Difference]: Start difference. First operand has 207 places, 248 transitions, 2403 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:59:27,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 265 transitions, 2989 flow [2024-06-21 17:59:27,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 2865 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:27,795 INFO L231 Difference]: Finished difference. Result has 208 places, 248 transitions, 2327 flow [2024-06-21 17:59:27,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2327, PETRI_PLACES=208, PETRI_TRANSITIONS=248} [2024-06-21 17:59:27,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 17:59:27,795 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 248 transitions, 2327 flow [2024-06-21 17:59:27,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:27,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:27,796 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 17:59:27,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:59:27,796 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:27,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash 380037213, now seen corresponding path program 1 times [2024-06-21 17:59:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:27,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756761161] [2024-06-21 17:59:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:27,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:28,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:28,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756761161] [2024-06-21 17:59:28,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756761161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:28,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:28,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:28,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485330304] [2024-06-21 17:59:28,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:28,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:28,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:28,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:28,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:28,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:28,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 248 transitions, 2327 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:28,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:28,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:28,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:29,046 INFO L124 PetriNetUnfolderBase]: 2622/4196 cut-off events. [2024-06-21 17:59:29,046 INFO L125 PetriNetUnfolderBase]: For 301752/301752 co-relation queries the response was YES. [2024-06-21 17:59:29,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28894 conditions, 4196 events. 2622/4196 cut-off events. For 301752/301752 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 24479 event pairs, 625 based on Foata normal form. 4/4199 useless extension candidates. Maximal degree in co-relation 28795. Up to 3810 conditions per place. [2024-06-21 17:59:29,083 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 213 selfloop transitions, 75 changer transitions 0/293 dead transitions. [2024-06-21 17:59:29,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 293 transitions, 3368 flow [2024-06-21 17:59:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:59:29,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:59:29,084 INFO L175 Difference]: Start difference. First operand has 208 places, 248 transitions, 2327 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:59:29,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 293 transitions, 3368 flow [2024-06-21 17:59:29,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 293 transitions, 3320 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:29,426 INFO L231 Difference]: Finished difference. Result has 212 places, 271 transitions, 2736 flow [2024-06-21 17:59:29,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2736, PETRI_PLACES=212, PETRI_TRANSITIONS=271} [2024-06-21 17:59:29,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-21 17:59:29,427 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 271 transitions, 2736 flow [2024-06-21 17:59:29,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:29,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:29,427 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 17:59:29,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:59:29,427 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:29,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash 383762080, now seen corresponding path program 1 times [2024-06-21 17:59:29,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:29,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044098567] [2024-06-21 17:59:29,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:29,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:30,002 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 17:59:30,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:30,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044098567] [2024-06-21 17:59:30,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044098567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:30,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:30,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:30,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643358425] [2024-06-21 17:59:30,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:30,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:30,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:30,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 271 transitions, 2736 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:30,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:30,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:30,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:30,845 INFO L124 PetriNetUnfolderBase]: 2724/4349 cut-off events. [2024-06-21 17:59:30,845 INFO L125 PetriNetUnfolderBase]: For 336706/336706 co-relation queries the response was YES. [2024-06-21 17:59:30,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31645 conditions, 4349 events. 2724/4349 cut-off events. For 336706/336706 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25380 event pairs, 625 based on Foata normal form. 6/4354 useless extension candidates. Maximal degree in co-relation 31543. Up to 3796 conditions per place. [2024-06-21 17:59:30,882 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 202 selfloop transitions, 97 changer transitions 0/304 dead transitions. [2024-06-21 17:59:30,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 304 transitions, 3894 flow [2024-06-21 17:59:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:30,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:59:30,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 17:59:30,883 INFO L175 Difference]: Start difference. First operand has 212 places, 271 transitions, 2736 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:59:30,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 304 transitions, 3894 flow [2024-06-21 17:59:31,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 304 transitions, 3776 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:31,304 INFO L231 Difference]: Finished difference. Result has 218 places, 284 transitions, 3111 flow [2024-06-21 17:59:31,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3111, PETRI_PLACES=218, PETRI_TRANSITIONS=284} [2024-06-21 17:59:31,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-21 17:59:31,305 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 284 transitions, 3111 flow [2024-06-21 17:59:31,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:31,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:31,305 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 17:59:31,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:59:31,306 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:31,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash 383761863, now seen corresponding path program 2 times [2024-06-21 17:59:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:31,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172141609] [2024-06-21 17:59:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:31,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:31,788 INFO 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 17:59:31,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:31,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172141609] [2024-06-21 17:59:31,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172141609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:31,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:31,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:31,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540110950] [2024-06-21 17:59:31,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:31,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:31,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:31,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:31,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:31,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 284 transitions, 3111 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:31,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:31,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:31,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:32,593 INFO L124 PetriNetUnfolderBase]: 2788/4445 cut-off events. [2024-06-21 17:59:32,593 INFO L125 PetriNetUnfolderBase]: For 358421/358421 co-relation queries the response was YES. [2024-06-21 17:59:32,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33213 conditions, 4445 events. 2788/4445 cut-off events. For 358421/358421 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 26028 event pairs, 630 based on Foata normal form. 8/4452 useless extension candidates. Maximal degree in co-relation 33109. Up to 3815 conditions per place. [2024-06-21 17:59:32,638 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 208 selfloop transitions, 103 changer transitions 0/316 dead transitions. [2024-06-21 17:59:32,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 316 transitions, 4293 flow [2024-06-21 17:59:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:59:32,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:59:32,639 INFO L175 Difference]: Start difference. First operand has 218 places, 284 transitions, 3111 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:59:32,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 316 transitions, 4293 flow [2024-06-21 17:59:33,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 316 transitions, 4094 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:33,220 INFO L231 Difference]: Finished difference. Result has 223 places, 295 transitions, 3342 flow [2024-06-21 17:59:33,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2934, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3342, PETRI_PLACES=223, PETRI_TRANSITIONS=295} [2024-06-21 17:59:33,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 17:59:33,220 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 295 transitions, 3342 flow [2024-06-21 17:59:33,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:33,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:33,221 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 17:59:33,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:59:33,221 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1436799857, now seen corresponding path program 3 times [2024-06-21 17:59:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:33,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499966145] [2024-06-21 17:59:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:33,699 INFO 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 17:59:33,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:33,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499966145] [2024-06-21 17:59:33,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499966145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:33,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:33,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:33,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096900162] [2024-06-21 17:59:33,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:33,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:33,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:33,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:33,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 295 transitions, 3342 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:33,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:33,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:33,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:34,471 INFO L124 PetriNetUnfolderBase]: 2826/4495 cut-off events. [2024-06-21 17:59:34,471 INFO L125 PetriNetUnfolderBase]: For 366050/366050 co-relation queries the response was YES. [2024-06-21 17:59:34,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33924 conditions, 4495 events. 2826/4495 cut-off events. For 366050/366050 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 26233 event pairs, 644 based on Foata normal form. 4/4498 useless extension candidates. Maximal degree in co-relation 33818. Up to 3849 conditions per place. [2024-06-21 17:59:34,519 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 105 changer transitions 0/327 dead transitions. [2024-06-21 17:59:34,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 327 transitions, 4532 flow [2024-06-21 17:59:34,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:34,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:34,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:59:34,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:59:34,520 INFO L175 Difference]: Start difference. First operand has 223 places, 295 transitions, 3342 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:59:34,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 327 transitions, 4532 flow [2024-06-21 17:59:35,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 327 transitions, 4343 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:35,223 INFO L231 Difference]: Finished difference. Result has 230 places, 307 transitions, 3662 flow [2024-06-21 17:59:35,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3662, PETRI_PLACES=230, PETRI_TRANSITIONS=307} [2024-06-21 17:59:35,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-21 17:59:35,224 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 307 transitions, 3662 flow [2024-06-21 17:59:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:35,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:35,224 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 17:59:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:59:35,224 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:35,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash -296647855, now seen corresponding path program 4 times [2024-06-21 17:59:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:35,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60775317] [2024-06-21 17:59:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:35,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:35,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60775317] [2024-06-21 17:59:35,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60775317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:35,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:35,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:35,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082730225] [2024-06-21 17:59:35,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:35,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:35,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:35,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:35,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 307 transitions, 3662 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:35,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:35,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:35,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:36,566 INFO L124 PetriNetUnfolderBase]: 2954/4671 cut-off events. [2024-06-21 17:59:36,566 INFO L125 PetriNetUnfolderBase]: For 414442/414444 co-relation queries the response was YES. [2024-06-21 17:59:36,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36640 conditions, 4671 events. 2954/4671 cut-off events. For 414442/414444 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27275 event pairs, 690 based on Foata normal form. 8/4678 useless extension candidates. Maximal degree in co-relation 36530. Up to 3729 conditions per place. [2024-06-21 17:59:36,617 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 128 changer transitions 0/348 dead transitions. [2024-06-21 17:59:36,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 348 transitions, 5186 flow [2024-06-21 17:59:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:36,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:59:36,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:59:36,618 INFO L175 Difference]: Start difference. First operand has 230 places, 307 transitions, 3662 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:59:36,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 348 transitions, 5186 flow [2024-06-21 17:59:37,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 4985 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:37,336 INFO L231 Difference]: Finished difference. Result has 237 places, 326 transitions, 4152 flow [2024-06-21 17:59:37,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4152, PETRI_PLACES=237, PETRI_TRANSITIONS=326} [2024-06-21 17:59:37,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-21 17:59:37,336 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 326 transitions, 4152 flow [2024-06-21 17:59:37,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:37,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:37,337 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 17:59:37,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:59:37,337 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:37,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -296647638, now seen corresponding path program 2 times [2024-06-21 17:59:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:37,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298899065] [2024-06-21 17:59:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:38,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:38,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298899065] [2024-06-21 17:59:38,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298899065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:38,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:38,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136486415] [2024-06-21 17:59:38,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:38,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:38,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:38,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 326 transitions, 4152 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:38,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:38,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:38,979 INFO L124 PetriNetUnfolderBase]: 2936/4647 cut-off events. [2024-06-21 17:59:38,979 INFO L125 PetriNetUnfolderBase]: For 413223/413225 co-relation queries the response was YES. [2024-06-21 17:59:39,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37305 conditions, 4647 events. 2936/4647 cut-off events. For 413223/413225 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 27117 event pairs, 692 based on Foata normal form. 6/4652 useless extension candidates. Maximal degree in co-relation 37191. Up to 3920 conditions per place. [2024-06-21 17:59:39,031 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 222 selfloop transitions, 128 changer transitions 0/355 dead transitions. [2024-06-21 17:59:39,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 355 transitions, 5590 flow [2024-06-21 17:59:39,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:59:39,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-21 17:59:39,032 INFO L175 Difference]: Start difference. First operand has 237 places, 326 transitions, 4152 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:59:39,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 355 transitions, 5590 flow [2024-06-21 17:59:39,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 355 transitions, 5307 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-21 17:59:39,707 INFO L231 Difference]: Finished difference. Result has 245 places, 336 transitions, 4412 flow [2024-06-21 17:59:39,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3963, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4412, PETRI_PLACES=245, PETRI_TRANSITIONS=336} [2024-06-21 17:59:39,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 17:59:39,708 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 336 transitions, 4412 flow [2024-06-21 17:59:39,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:39,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:39,708 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 17:59:39,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:59:39,708 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:39,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1587223554, now seen corresponding path program 3 times [2024-06-21 17:59:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:39,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797280473] [2024-06-21 17:59:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:40,306 INFO 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 17:59:40,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:40,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797280473] [2024-06-21 17:59:40,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797280473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:40,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:40,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:40,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382609880] [2024-06-21 17:59:40,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:40,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:40,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:40,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:40,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 336 transitions, 4412 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:40,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:40,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:40,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:41,146 INFO L124 PetriNetUnfolderBase]: 2946/4659 cut-off events. [2024-06-21 17:59:41,146 INFO L125 PetriNetUnfolderBase]: For 411697/411701 co-relation queries the response was YES. [2024-06-21 17:59:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37528 conditions, 4659 events. 2946/4659 cut-off events. For 411697/411701 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27214 event pairs, 673 based on Foata normal form. 6/4664 useless extension candidates. Maximal degree in co-relation 37410. Up to 4350 conditions per place. [2024-06-21 17:59:41,198 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 73 changer transitions 0/352 dead transitions. [2024-06-21 17:59:41,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 352 transitions, 5242 flow [2024-06-21 17:59:41,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:59:41,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 17:59:41,199 INFO L175 Difference]: Start difference. First operand has 245 places, 336 transitions, 4412 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:59:41,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 352 transitions, 5242 flow [2024-06-21 17:59:41,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 5037 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:41,903 INFO L231 Difference]: Finished difference. Result has 250 places, 340 transitions, 4462 flow [2024-06-21 17:59:41,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4462, PETRI_PLACES=250, PETRI_TRANSITIONS=340} [2024-06-21 17:59:41,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-21 17:59:41,903 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 340 transitions, 4462 flow [2024-06-21 17:59:41,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:41,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:41,903 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 17:59:41,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:59:41,904 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:41,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:41,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1579866107, now seen corresponding path program 5 times [2024-06-21 17:59:41,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:41,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247619936] [2024-06-21 17:59:41,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:41,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:42,431 INFO 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 17:59:42,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:42,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247619936] [2024-06-21 17:59:42,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247619936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:42,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:42,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:42,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17606880] [2024-06-21 17:59:42,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:42,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:42,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:42,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:42,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 340 transitions, 4462 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:42,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:42,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:42,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:43,317 INFO L124 PetriNetUnfolderBase]: 2966/4707 cut-off events. [2024-06-21 17:59:43,317 INFO L125 PetriNetUnfolderBase]: For 427252/427254 co-relation queries the response was YES. [2024-06-21 17:59:43,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37987 conditions, 4707 events. 2966/4707 cut-off events. For 427252/427254 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27632 event pairs, 693 based on Foata normal form. 4/4710 useless extension candidates. Maximal degree in co-relation 37867. Up to 3744 conditions per place. [2024-06-21 17:59:43,365 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 142 changer transitions 0/364 dead transitions. [2024-06-21 17:59:43,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 364 transitions, 5827 flow [2024-06-21 17:59:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 17:59:43,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 17:59:43,366 INFO L175 Difference]: Start difference. First operand has 250 places, 340 transitions, 4462 flow. Second operand 8 states and 148 transitions. [2024-06-21 17:59:43,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 364 transitions, 5827 flow [2024-06-21 17:59:44,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 364 transitions, 5566 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:44,130 INFO L231 Difference]: Finished difference. Result has 253 places, 344 transitions, 4601 flow [2024-06-21 17:59:44,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4601, PETRI_PLACES=253, PETRI_TRANSITIONS=344} [2024-06-21 17:59:44,130 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-21 17:59:44,130 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 344 transitions, 4601 flow [2024-06-21 17:59:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:44,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:44,131 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 17:59:44,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:59:44,131 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:44,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1587490464, now seen corresponding path program 4 times [2024-06-21 17:59:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:44,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308360288] [2024-06-21 17:59:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:44,829 INFO 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 17:59:44,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:44,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308360288] [2024-06-21 17:59:44,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308360288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:44,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:44,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099334234] [2024-06-21 17:59:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:44,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:44,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:44,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 344 transitions, 4601 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:44,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:44,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:44,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:45,807 INFO L124 PetriNetUnfolderBase]: 2968/4692 cut-off events. [2024-06-21 17:59:45,807 INFO L125 PetriNetUnfolderBase]: For 433112/433116 co-relation queries the response was YES. [2024-06-21 17:59:45,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38506 conditions, 4692 events. 2968/4692 cut-off events. For 433112/433116 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27385 event pairs, 670 based on Foata normal form. 6/4697 useless extension candidates. Maximal degree in co-relation 38384. Up to 4357 conditions per place. [2024-06-21 17:59:45,854 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 89 changer transitions 0/368 dead transitions. [2024-06-21 17:59:45,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 368 transitions, 5565 flow [2024-06-21 17:59:45,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:59:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:59:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 17:59:45,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 17:59:45,861 INFO L175 Difference]: Start difference. First operand has 253 places, 344 transitions, 4601 flow. Second operand 9 states and 148 transitions. [2024-06-21 17:59:45,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 368 transitions, 5565 flow [2024-06-21 17:59:46,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 368 transitions, 5290 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:46,495 INFO L231 Difference]: Finished difference. Result has 258 places, 355 transitions, 4747 flow [2024-06-21 17:59:46,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4345, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4747, PETRI_PLACES=258, PETRI_TRANSITIONS=355} [2024-06-21 17:59:46,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-21 17:59:46,495 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 355 transitions, 4747 flow [2024-06-21 17:59:46,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:46,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:46,496 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 17:59:46,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:59:46,496 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:46,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:46,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1587223337, now seen corresponding path program 6 times [2024-06-21 17:59:46,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:46,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402187705] [2024-06-21 17:59:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:46,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:46,998 INFO 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 17:59:46,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:46,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402187705] [2024-06-21 17:59:46,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402187705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:46,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:46,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:46,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120446143] [2024-06-21 17:59:46,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:46,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:46,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:47,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:47,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 355 transitions, 4747 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:47,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:47,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:47,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:47,910 INFO L124 PetriNetUnfolderBase]: 2992/4736 cut-off events. [2024-06-21 17:59:47,910 INFO L125 PetriNetUnfolderBase]: For 453654/453656 co-relation queries the response was YES. [2024-06-21 17:59:47,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38583 conditions, 4736 events. 2992/4736 cut-off events. For 453654/453656 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 27729 event pairs, 681 based on Foata normal form. 8/4743 useless extension candidates. Maximal degree in co-relation 38459. Up to 3774 conditions per place. [2024-06-21 17:59:47,965 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 197 selfloop transitions, 182 changer transitions 0/384 dead transitions. [2024-06-21 17:59:47,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 384 transitions, 6250 flow [2024-06-21 17:59:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:47,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 17:59:47,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 17:59:47,966 INFO L175 Difference]: Start difference. First operand has 258 places, 355 transitions, 4747 flow. Second operand 8 states and 149 transitions. [2024-06-21 17:59:47,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 384 transitions, 6250 flow [2024-06-21 17:59:48,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 384 transitions, 6017 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 17:59:48,697 INFO L231 Difference]: Finished difference. Result has 260 places, 366 transitions, 5143 flow [2024-06-21 17:59:48,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5143, PETRI_PLACES=260, PETRI_TRANSITIONS=366} [2024-06-21 17:59:48,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 17:59:48,697 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 366 transitions, 5143 flow [2024-06-21 17:59:48,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:48,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:48,698 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 17:59:48,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:59:48,698 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:48,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1855574691, now seen corresponding path program 1 times [2024-06-21 17:59:48,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:48,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918258814] [2024-06-21 17:59:48,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:48,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:49,149 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 17:59:49,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918258814] [2024-06-21 17:59:49,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918258814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:49,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:49,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:49,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989115718] [2024-06-21 17:59:49,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:49,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:49,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:49,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:49,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:49,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:49,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 366 transitions, 5143 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:49,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:49,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:49,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:50,165 INFO L124 PetriNetUnfolderBase]: 3002/4748 cut-off events. [2024-06-21 17:59:50,165 INFO L125 PetriNetUnfolderBase]: For 451766/451768 co-relation queries the response was YES. [2024-06-21 17:59:50,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39362 conditions, 4748 events. 3002/4748 cut-off events. For 451766/451768 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 27805 event pairs, 670 based on Foata normal form. 2/4750 useless extension candidates. Maximal degree in co-relation 39237. Up to 4392 conditions per place. [2024-06-21 17:59:50,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 68 changer transitions 0/395 dead transitions. [2024-06-21 17:59:50,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 395 transitions, 6103 flow [2024-06-21 17:59:50,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:59:50,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 17:59:50,220 INFO L175 Difference]: Start difference. First operand has 260 places, 366 transitions, 5143 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:59:50,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 395 transitions, 6103 flow [2024-06-21 17:59:50,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 395 transitions, 5865 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-21 17:59:50,963 INFO L231 Difference]: Finished difference. Result has 266 places, 370 transitions, 5146 flow [2024-06-21 17:59:50,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5146, PETRI_PLACES=266, PETRI_TRANSITIONS=370} [2024-06-21 17:59:50,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 17:59:50,963 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 370 transitions, 5146 flow [2024-06-21 17:59:50,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:50,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:50,963 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 17:59:50,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:59:50,964 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:50,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1562911287, now seen corresponding path program 2 times [2024-06-21 17:59:50,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:50,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279700063] [2024-06-21 17:59:50,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:50,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:51,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:59:51,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:51,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279700063] [2024-06-21 17:59:51,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279700063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:51,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:51,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:51,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803077038] [2024-06-21 17:59:51,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:51,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:51,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:51,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:51,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:51,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:51,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 370 transitions, 5146 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:51,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:51,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:52,369 INFO L124 PetriNetUnfolderBase]: 3020/4774 cut-off events. [2024-06-21 17:59:52,369 INFO L125 PetriNetUnfolderBase]: For 463720/463722 co-relation queries the response was YES. [2024-06-21 17:59:52,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39784 conditions, 4774 events. 3020/4774 cut-off events. For 463720/463722 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27936 event pairs, 670 based on Foata normal form. 2/4776 useless extension candidates. Maximal degree in co-relation 39656. Up to 4396 conditions per place. [2024-06-21 17:59:52,426 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 320 selfloop transitions, 74 changer transitions 0/399 dead transitions. [2024-06-21 17:59:52,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 399 transitions, 6310 flow [2024-06-21 17:59:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:52,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:59:52,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 17:59:52,427 INFO L175 Difference]: Start difference. First operand has 266 places, 370 transitions, 5146 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:59:52,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 399 transitions, 6310 flow [2024-06-21 17:59:53,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 399 transitions, 6155 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 17:59:53,192 INFO L231 Difference]: Finished difference. Result has 271 places, 376 transitions, 5315 flow [2024-06-21 17:59:53,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4991, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5315, PETRI_PLACES=271, PETRI_TRANSITIONS=376} [2024-06-21 17:59:53,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 17:59:53,193 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 376 transitions, 5315 flow [2024-06-21 17:59:53,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:53,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:53,193 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 17:59:53,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:59:53,193 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:53,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:53,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2110886009, now seen corresponding path program 3 times [2024-06-21 17:59:53,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:53,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501340646] [2024-06-21 17:59:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:53,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:53,727 INFO 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 17:59:53,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:53,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501340646] [2024-06-21 17:59:53,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501340646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:53,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:53,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:53,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768673919] [2024-06-21 17:59:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:53,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:53,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:53,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 376 transitions, 5315 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:53,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:53,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:53,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:54,769 INFO L124 PetriNetUnfolderBase]: 3070/4838 cut-off events. [2024-06-21 17:59:54,769 INFO L125 PetriNetUnfolderBase]: For 491681/491683 co-relation queries the response was YES. [2024-06-21 17:59:54,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41006 conditions, 4838 events. 3070/4838 cut-off events. For 491681/491683 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28339 event pairs, 690 based on Foata normal form. 2/4840 useless extension candidates. Maximal degree in co-relation 40876. Up to 4412 conditions per place. [2024-06-21 17:59:54,823 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 311 selfloop transitions, 91 changer transitions 0/407 dead transitions. [2024-06-21 17:59:54,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 407 transitions, 6622 flow [2024-06-21 17:59:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:59:54,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 17:59:54,824 INFO L175 Difference]: Start difference. First operand has 271 places, 376 transitions, 5315 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:59:54,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 407 transitions, 6622 flow [2024-06-21 17:59:55,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 407 transitions, 6466 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:55,457 INFO L231 Difference]: Finished difference. Result has 275 places, 388 transitions, 5702 flow [2024-06-21 17:59:55,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5702, PETRI_PLACES=275, PETRI_TRANSITIONS=388} [2024-06-21 17:59:55,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-21 17:59:55,458 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 388 transitions, 5702 flow [2024-06-21 17:59:55,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:55,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:55,458 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 17:59:55,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:59:55,458 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:55,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2109811403, now seen corresponding path program 4 times [2024-06-21 17:59:55,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843536967] [2024-06-21 17:59:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:55,902 INFO 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 17:59:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843536967] [2024-06-21 17:59:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843536967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:55,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:55,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:55,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47230081] [2024-06-21 17:59:55,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:55,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:55,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:55,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:55,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 388 transitions, 5702 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:55,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:55,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:55,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:56,902 INFO L124 PetriNetUnfolderBase]: 3080/4858 cut-off events. [2024-06-21 17:59:56,903 INFO L125 PetriNetUnfolderBase]: For 504548/504548 co-relation queries the response was YES. [2024-06-21 17:59:56,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41554 conditions, 4858 events. 3080/4858 cut-off events. For 504548/504548 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28435 event pairs, 662 based on Foata normal form. 2/4859 useless extension candidates. Maximal degree in co-relation 41422. Up to 4502 conditions per place. [2024-06-21 17:59:56,961 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 67 changer transitions 0/414 dead transitions. [2024-06-21 17:59:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 414 transitions, 6700 flow [2024-06-21 17:59:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:59:56,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:59:56,962 INFO L175 Difference]: Start difference. First operand has 275 places, 388 transitions, 5702 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:59:56,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 414 transitions, 6700 flow [2024-06-21 17:59:57,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 414 transitions, 6523 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:59:57,806 INFO L231 Difference]: Finished difference. Result has 279 places, 392 transitions, 5776 flow [2024-06-21 17:59:57,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5776, PETRI_PLACES=279, PETRI_TRANSITIONS=392} [2024-06-21 17:59:57,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 17:59:57,807 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 392 transitions, 5776 flow [2024-06-21 17:59:57,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:57,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:59:57,807 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 17:59:57,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:59:57,807 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:59:57,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:59:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1372522655, now seen corresponding path program 5 times [2024-06-21 17:59:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:59:57,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731589798] [2024-06-21 17:59:57,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:59:57,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:59:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:59:58,324 INFO 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 17:59:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:59:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731589798] [2024-06-21 17:59:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731589798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:59:58,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:59:58,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:59:58,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275282828] [2024-06-21 17:59:58,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:59:58,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:59:58,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:59:58,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:59:58,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:59:58,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 17:59:58,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 392 transitions, 5776 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:59:58,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:59:58,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 17:59:58,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:59:59,453 INFO L124 PetriNetUnfolderBase]: 3074/4846 cut-off events. [2024-06-21 17:59:59,453 INFO L125 PetriNetUnfolderBase]: For 509974/509974 co-relation queries the response was YES. [2024-06-21 17:59:59,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41418 conditions, 4846 events. 3074/4846 cut-off events. For 509974/509974 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28353 event pairs, 680 based on Foata normal form. 2/4847 useless extension candidates. Maximal degree in co-relation 41284. Up to 4462 conditions per place. [2024-06-21 17:59:59,516 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 331 selfloop transitions, 77 changer transitions 0/413 dead transitions. [2024-06-21 17:59:59,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 413 transitions, 6826 flow [2024-06-21 17:59:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:59:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:59:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:59:59,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 17:59:59,517 INFO L175 Difference]: Start difference. First operand has 279 places, 392 transitions, 5776 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:59:59,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 413 transitions, 6826 flow [2024-06-21 18:00:00,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 6698 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:00,315 INFO L231 Difference]: Finished difference. Result has 283 places, 392 transitions, 5808 flow [2024-06-21 18:00:00,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5808, PETRI_PLACES=283, PETRI_TRANSITIONS=392} [2024-06-21 18:00:00,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-21 18:00:00,315 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 392 transitions, 5808 flow [2024-06-21 18:00:00,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:00,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:00,315 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 18:00:00,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 18:00:00,316 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:00,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:00,316 INFO L85 PathProgramCache]: Analyzing trace with hash -157077163, now seen corresponding path program 6 times [2024-06-21 18:00:00,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:00,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137756465] [2024-06-21 18:00:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:00,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:00,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:00,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137756465] [2024-06-21 18:00:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137756465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:00,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:00,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104735979] [2024-06-21 18:00:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:00,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:00,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 392 transitions, 5808 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:00,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:00,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:00,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:01,853 INFO L124 PetriNetUnfolderBase]: 3068/4842 cut-off events. [2024-06-21 18:00:01,853 INFO L125 PetriNetUnfolderBase]: For 515827/515827 co-relation queries the response was YES. [2024-06-21 18:00:01,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41335 conditions, 4842 events. 3068/4842 cut-off events. For 515827/515827 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28385 event pairs, 664 based on Foata normal form. 2/4843 useless extension candidates. Maximal degree in co-relation 41200. Up to 4486 conditions per place. [2024-06-21 18:00:01,916 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 71 changer transitions 0/415 dead transitions. [2024-06-21 18:00:01,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 415 transitions, 6720 flow [2024-06-21 18:00:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 18:00:01,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 18:00:01,917 INFO L175 Difference]: Start difference. First operand has 283 places, 392 transitions, 5808 flow. Second operand 8 states and 138 transitions. [2024-06-21 18:00:01,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 415 transitions, 6720 flow [2024-06-21 18:00:02,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 415 transitions, 6491 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:02,707 INFO L231 Difference]: Finished difference. Result has 284 places, 392 transitions, 5728 flow [2024-06-21 18:00:02,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5579, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5728, PETRI_PLACES=284, PETRI_TRANSITIONS=392} [2024-06-21 18:00:02,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 18:00:02,708 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 392 transitions, 5728 flow [2024-06-21 18:00:02,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:02,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:02,708 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 18:00:02,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 18:00:02,708 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:02,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash -992939435, now seen corresponding path program 7 times [2024-06-21 18:00:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:02,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741958470] [2024-06-21 18:00:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:02,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:03,198 INFO 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 18:00:03,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:03,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741958470] [2024-06-21 18:00:03,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741958470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:03,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:03,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:03,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846548461] [2024-06-21 18:00:03,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:03,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:03,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:03,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:03,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:03,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:03,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 392 transitions, 5728 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:03,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:03,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:03,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:04,254 INFO L124 PetriNetUnfolderBase]: 3052/4820 cut-off events. [2024-06-21 18:00:04,254 INFO L125 PetriNetUnfolderBase]: For 520184/520184 co-relation queries the response was YES. [2024-06-21 18:00:04,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40886 conditions, 4820 events. 3052/4820 cut-off events. For 520184/520184 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28320 event pairs, 657 based on Foata normal form. 4/4823 useless extension candidates. Maximal degree in co-relation 40751. Up to 4396 conditions per place. [2024-06-21 18:00:04,320 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 325 selfloop transitions, 83 changer transitions 0/413 dead transitions. [2024-06-21 18:00:04,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 413 transitions, 6628 flow [2024-06-21 18:00:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:00:04,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:00:04,321 INFO L175 Difference]: Start difference. First operand has 284 places, 392 transitions, 5728 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:00:04,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 413 transitions, 6628 flow [2024-06-21 18:00:05,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 413 transitions, 6401 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 18:00:05,375 INFO L231 Difference]: Finished difference. Result has 283 places, 392 transitions, 5675 flow [2024-06-21 18:00:05,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5501, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=283, PETRI_TRANSITIONS=392} [2024-06-21 18:00:05,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-21 18:00:05,376 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 392 transitions, 5675 flow [2024-06-21 18:00:05,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:05,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:05,380 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 18:00:05,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 18:00:05,380 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:05,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:05,380 INFO L85 PathProgramCache]: Analyzing trace with hash -988737695, now seen corresponding path program 8 times [2024-06-21 18:00:05,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:05,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757627968] [2024-06-21 18:00:05,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:05,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:05,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:05,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757627968] [2024-06-21 18:00:05,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757627968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:05,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:05,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:05,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834516501] [2024-06-21 18:00:05,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:05,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:05,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:05,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 392 transitions, 5675 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:05,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:05,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:05,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:06,988 INFO L124 PetriNetUnfolderBase]: 3086/4873 cut-off events. [2024-06-21 18:00:06,989 INFO L125 PetriNetUnfolderBase]: For 539405/539405 co-relation queries the response was YES. [2024-06-21 18:00:07,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41361 conditions, 4873 events. 3086/4873 cut-off events. For 539405/539405 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28577 event pairs, 665 based on Foata normal form. 6/4878 useless extension candidates. Maximal degree in co-relation 41228. Up to 4156 conditions per place. [2024-06-21 18:00:07,072 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 281 selfloop transitions, 133 changer transitions 0/419 dead transitions. [2024-06-21 18:00:07,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 419 transitions, 7042 flow [2024-06-21 18:00:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:07,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:07,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 18:00:07,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-21 18:00:07,073 INFO L175 Difference]: Start difference. First operand has 283 places, 392 transitions, 5675 flow. Second operand 8 states and 145 transitions. [2024-06-21 18:00:07,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 419 transitions, 7042 flow [2024-06-21 18:00:08,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 419 transitions, 6838 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:08,128 INFO L231 Difference]: Finished difference. Result has 284 places, 399 transitions, 5893 flow [2024-06-21 18:00:08,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5893, PETRI_PLACES=284, PETRI_TRANSITIONS=399} [2024-06-21 18:00:08,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-21 18:00:08,129 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 399 transitions, 5893 flow [2024-06-21 18:00:08,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:08,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:08,129 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 18:00:08,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 18:00:08,130 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:08,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:08,130 INFO L85 PathProgramCache]: Analyzing trace with hash -988470785, now seen corresponding path program 9 times [2024-06-21 18:00:08,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:08,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120449634] [2024-06-21 18:00:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:08,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:08,687 INFO 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 18:00:08,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:08,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120449634] [2024-06-21 18:00:08,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120449634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:08,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:08,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:08,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942805363] [2024-06-21 18:00:08,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:08,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:08,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:08,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:08,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:08,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:08,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 399 transitions, 5893 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:08,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:08,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:08,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:09,796 INFO L124 PetriNetUnfolderBase]: 3062/4846 cut-off events. [2024-06-21 18:00:09,797 INFO L125 PetriNetUnfolderBase]: For 532774/532774 co-relation queries the response was YES. [2024-06-21 18:00:09,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40906 conditions, 4846 events. 3062/4846 cut-off events. For 532774/532774 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28499 event pairs, 653 based on Foata normal form. 6/4851 useless extension candidates. Maximal degree in co-relation 40772. Up to 4140 conditions per place. [2024-06-21 18:00:09,868 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 129 changer transitions 0/418 dead transitions. [2024-06-21 18:00:09,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 418 transitions, 6953 flow [2024-06-21 18:00:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 18:00:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:00:09,869 INFO L175 Difference]: Start difference. First operand has 284 places, 399 transitions, 5893 flow. Second operand 8 states and 144 transitions. [2024-06-21 18:00:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 418 transitions, 6953 flow [2024-06-21 18:00:10,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 418 transitions, 6480 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:10,695 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 5691 flow [2024-06-21 18:00:10,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5691, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2024-06-21 18:00:10,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-21 18:00:10,696 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 5691 flow [2024-06-21 18:00:10,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:10,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:10,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:00:10,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 18:00:10,697 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:10,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:10,697 INFO L85 PathProgramCache]: Analyzing trace with hash -813255913, now seen corresponding path program 10 times [2024-06-21 18:00:10,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:10,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835615801] [2024-06-21 18:00:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:10,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835615801] [2024-06-21 18:00:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835615801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:11,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:11,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359098096] [2024-06-21 18:00:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:11,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:11,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:11,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 5691 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:11,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:11,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:11,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:12,314 INFO L124 PetriNetUnfolderBase]: 3120/4926 cut-off events. [2024-06-21 18:00:12,314 INFO L125 PetriNetUnfolderBase]: For 553458/553460 co-relation queries the response was YES. [2024-06-21 18:00:12,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41635 conditions, 4926 events. 3120/4926 cut-off events. For 553458/553460 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 28933 event pairs, 694 based on Foata normal form. 6/4931 useless extension candidates. Maximal degree in co-relation 41501. Up to 3872 conditions per place. [2024-06-21 18:00:12,388 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 208 changer transitions 0/428 dead transitions. [2024-06-21 18:00:12,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 428 transitions, 7298 flow [2024-06-21 18:00:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:00:12,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 18:00:12,390 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 5691 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:00:12,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 428 transitions, 7298 flow [2024-06-21 18:00:13,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 428 transitions, 7072 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:13,424 INFO L231 Difference]: Finished difference. Result has 288 places, 410 transitions, 6111 flow [2024-06-21 18:00:13,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5465, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6111, PETRI_PLACES=288, PETRI_TRANSITIONS=410} [2024-06-21 18:00:13,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-21 18:00:13,425 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 410 transitions, 6111 flow [2024-06-21 18:00:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:13,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:13,425 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 18:00:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 18:00:13,425 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:13,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1978296241, now seen corresponding path program 11 times [2024-06-21 18:00:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:13,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936025339] [2024-06-21 18:00:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:13,946 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 18:00:13,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:13,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936025339] [2024-06-21 18:00:13,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936025339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:13,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:13,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258715887] [2024-06-21 18:00:13,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:13,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:13,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:13,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:13,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:14,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:14,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 410 transitions, 6111 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:14,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:14,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:14,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:15,025 INFO L124 PetriNetUnfolderBase]: 3150/4975 cut-off events. [2024-06-21 18:00:15,025 INFO L125 PetriNetUnfolderBase]: For 569102/569104 co-relation queries the response was YES. [2024-06-21 18:00:15,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42583 conditions, 4975 events. 3150/4975 cut-off events. For 569102/569104 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29250 event pairs, 685 based on Foata normal form. 6/4980 useless extension candidates. Maximal degree in co-relation 42447. Up to 3894 conditions per place. [2024-06-21 18:00:15,109 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 199 changer transitions 0/435 dead transitions. [2024-06-21 18:00:15,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 435 transitions, 7668 flow [2024-06-21 18:00:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:00:15,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 18:00:15,110 INFO L175 Difference]: Start difference. First operand has 288 places, 410 transitions, 6111 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:00:15,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 435 transitions, 7668 flow [2024-06-21 18:00:16,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 435 transitions, 7137 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:16,281 INFO L231 Difference]: Finished difference. Result has 291 places, 417 transitions, 6129 flow [2024-06-21 18:00:16,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6129, PETRI_PLACES=291, PETRI_TRANSITIONS=417} [2024-06-21 18:00:16,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-21 18:00:16,282 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 417 transitions, 6129 flow [2024-06-21 18:00:16,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:16,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:16,282 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 18:00:16,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 18:00:16,282 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:16,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:16,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1730928481, now seen corresponding path program 12 times [2024-06-21 18:00:16,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:16,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605707924] [2024-06-21 18:00:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:16,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:16,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605707924] [2024-06-21 18:00:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605707924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:16,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:16,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:16,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399036534] [2024-06-21 18:00:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:16,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:16,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 417 transitions, 6129 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:16,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:16,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:16,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:17,886 INFO L124 PetriNetUnfolderBase]: 3128/4945 cut-off events. [2024-06-21 18:00:17,887 INFO L125 PetriNetUnfolderBase]: For 559286/559288 co-relation queries the response was YES. [2024-06-21 18:00:17,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41869 conditions, 4945 events. 3128/4945 cut-off events. For 559286/559288 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29105 event pairs, 695 based on Foata normal form. 6/4950 useless extension candidates. Maximal degree in co-relation 41732. Up to 3880 conditions per place. [2024-06-21 18:00:17,962 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 195 changer transitions 0/435 dead transitions. [2024-06-21 18:00:17,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 435 transitions, 7557 flow [2024-06-21 18:00:17,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 18:00:17,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 18:00:17,963 INFO L175 Difference]: Start difference. First operand has 291 places, 417 transitions, 6129 flow. Second operand 8 states and 149 transitions. [2024-06-21 18:00:17,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 435 transitions, 7557 flow [2024-06-21 18:00:19,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 435 transitions, 7176 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:19,112 INFO L231 Difference]: Finished difference. Result has 295 places, 417 transitions, 6149 flow [2024-06-21 18:00:19,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6149, PETRI_PLACES=295, PETRI_TRANSITIONS=417} [2024-06-21 18:00:19,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 18:00:19,113 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 417 transitions, 6149 flow [2024-06-21 18:00:19,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:19,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:19,114 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 18:00:19,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 18:00:19,114 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:19,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1952617975, now seen corresponding path program 1 times [2024-06-21 18:00:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:19,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668190440] [2024-06-21 18:00:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:19,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:19,797 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 18:00:19,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668190440] [2024-06-21 18:00:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668190440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:19,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:19,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:19,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323283469] [2024-06-21 18:00:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:19,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:19,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:19,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 417 transitions, 6149 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:19,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:19,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:19,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:20,871 INFO L124 PetriNetUnfolderBase]: 3016/4833 cut-off events. [2024-06-21 18:00:20,871 INFO L125 PetriNetUnfolderBase]: For 599481/599483 co-relation queries the response was YES. [2024-06-21 18:00:20,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40847 conditions, 4833 events. 3016/4833 cut-off events. For 599481/599483 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 28966 event pairs, 641 based on Foata normal form. 15/4814 useless extension candidates. Maximal degree in co-relation 40709. Up to 4213 conditions per place. [2024-06-21 18:00:20,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 317 selfloop transitions, 39 changer transitions 0/441 dead transitions. [2024-06-21 18:00:20,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 441 transitions, 7028 flow [2024-06-21 18:00:20,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:20,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:00:20,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:00:20,934 INFO L175 Difference]: Start difference. First operand has 295 places, 417 transitions, 6149 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:00:20,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 441 transitions, 7028 flow [2024-06-21 18:00:21,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 441 transitions, 6478 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 18:00:21,851 INFO L231 Difference]: Finished difference. Result has 295 places, 424 transitions, 5789 flow [2024-06-21 18:00:21,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5789, PETRI_PLACES=295, PETRI_TRANSITIONS=424} [2024-06-21 18:00:21,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-21 18:00:21,851 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 424 transitions, 5789 flow [2024-06-21 18:00:21,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:21,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:21,852 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 18:00:21,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 18:00:21,852 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:21,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:21,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1967855095, now seen corresponding path program 2 times [2024-06-21 18:00:21,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:21,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064800211] [2024-06-21 18:00:21,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:21,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:22,480 INFO 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 18:00:22,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:22,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064800211] [2024-06-21 18:00:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064800211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:22,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:22,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169848168] [2024-06-21 18:00:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:22,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:22,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:22,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:22,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:22,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 424 transitions, 5789 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:22,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:22,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:22,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:23,500 INFO L124 PetriNetUnfolderBase]: 3104/4962 cut-off events. [2024-06-21 18:00:23,500 INFO L125 PetriNetUnfolderBase]: For 624688/624690 co-relation queries the response was YES. [2024-06-21 18:00:23,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42144 conditions, 4962 events. 3104/4962 cut-off events. For 624688/624690 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29771 event pairs, 664 based on Foata normal form. 9/4937 useless extension candidates. Maximal degree in co-relation 42005. Up to 4172 conditions per place. [2024-06-21 18:00:23,572 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 315 selfloop transitions, 48 changer transitions 0/448 dead transitions. [2024-06-21 18:00:23,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 448 transitions, 6859 flow [2024-06-21 18:00:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 18:00:23,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 18:00:23,573 INFO L175 Difference]: Start difference. First operand has 295 places, 424 transitions, 5789 flow. Second operand 8 states and 142 transitions. [2024-06-21 18:00:23,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 448 transitions, 6859 flow [2024-06-21 18:00:24,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 448 transitions, 6766 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 18:00:24,641 INFO L231 Difference]: Finished difference. Result has 298 places, 426 transitions, 5838 flow [2024-06-21 18:00:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5696, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5838, PETRI_PLACES=298, PETRI_TRANSITIONS=426} [2024-06-21 18:00:24,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-21 18:00:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 426 transitions, 5838 flow [2024-06-21 18:00:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:24,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:24,642 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 18:00:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 18:00:24,642 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:24,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash -370180849, now seen corresponding path program 3 times [2024-06-21 18:00:24,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:24,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166977905] [2024-06-21 18:00:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:24,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166977905] [2024-06-21 18:00:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166977905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:25,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:00:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187254031] [2024-06-21 18:00:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:00:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:00:25,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:00:25,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 18:00:25,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 426 transitions, 5838 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:25,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:25,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 18:00:25,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:26,595 INFO L124 PetriNetUnfolderBase]: 3114/4974 cut-off events. [2024-06-21 18:00:26,595 INFO L125 PetriNetUnfolderBase]: For 631278/631280 co-relation queries the response was YES. [2024-06-21 18:00:26,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42027 conditions, 4974 events. 3114/4974 cut-off events. For 631278/631280 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29806 event pairs, 672 based on Foata normal form. 11/4949 useless extension candidates. Maximal degree in co-relation 41887. Up to 4315 conditions per place. [2024-06-21 18:00:26,667 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 51 changer transitions 0/445 dead transitions. [2024-06-21 18:00:26,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 445 transitions, 6666 flow [2024-06-21 18:00:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:00:26,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 18:00:26,668 INFO L175 Difference]: Start difference. First operand has 298 places, 426 transitions, 5838 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:00:26,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 445 transitions, 6666 flow [2024-06-21 18:00:27,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 445 transitions, 6603 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 18:00:27,664 INFO L231 Difference]: Finished difference. Result has 303 places, 427 transitions, 5913 flow [2024-06-21 18:00:27,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5775, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5913, PETRI_PLACES=303, PETRI_TRANSITIONS=427} [2024-06-21 18:00:27,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-21 18:00:27,665 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 427 transitions, 5913 flow [2024-06-21 18:00:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:27,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:27,665 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 18:00:27,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 18:00:27,665 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:27,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:27,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1106608995, now seen corresponding path program 1 times [2024-06-21 18:00:27,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215931822] [2024-06-21 18:00:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:27,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:28,386 INFO 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 18:00:28,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215931822] [2024-06-21 18:00:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215931822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:28,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:28,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652923345] [2024-06-21 18:00:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:28,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:28,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:28,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:28,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:28,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:28,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 427 transitions, 5913 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:28,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:28,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:28,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:29,619 INFO L124 PetriNetUnfolderBase]: 3295/5223 cut-off events. [2024-06-21 18:00:29,619 INFO L125 PetriNetUnfolderBase]: For 616385/616385 co-relation queries the response was YES. [2024-06-21 18:00:29,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44174 conditions, 5223 events. 3295/5223 cut-off events. For 616385/616385 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31159 event pairs, 673 based on Foata normal form. 2/5225 useless extension candidates. Maximal degree in co-relation 44032. Up to 4966 conditions per place. [2024-06-21 18:00:29,683 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 429 selfloop transitions, 17 changer transitions 0/451 dead transitions. [2024-06-21 18:00:29,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 451 transitions, 6959 flow [2024-06-21 18:00:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:00:29,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 18:00:29,684 INFO L175 Difference]: Start difference. First operand has 303 places, 427 transitions, 5913 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:00:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 451 transitions, 6959 flow [2024-06-21 18:00:30,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 451 transitions, 6859 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:30,842 INFO L231 Difference]: Finished difference. Result has 304 places, 429 transitions, 5928 flow [2024-06-21 18:00:30,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5813, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=304, PETRI_TRANSITIONS=429} [2024-06-21 18:00:30,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 18:00:30,843 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 429 transitions, 5928 flow [2024-06-21 18:00:30,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:30,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:30,843 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 18:00:30,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 18:00:30,843 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:30,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:30,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1106548421, now seen corresponding path program 1 times [2024-06-21 18:00:30,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:30,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314447209] [2024-06-21 18:00:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:30,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:31,538 INFO 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 18:00:31,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:31,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314447209] [2024-06-21 18:00:31,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314447209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:31,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:31,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:31,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067625778] [2024-06-21 18:00:31,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:31,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:31,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:31,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:31,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 429 transitions, 5928 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:31,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:31,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:31,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:32,622 INFO L124 PetriNetUnfolderBase]: 3289/5208 cut-off events. [2024-06-21 18:00:32,623 INFO L125 PetriNetUnfolderBase]: For 619876/619876 co-relation queries the response was YES. [2024-06-21 18:00:32,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44008 conditions, 5208 events. 3289/5208 cut-off events. For 619876/619876 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 31038 event pairs, 680 based on Foata normal form. 2/5209 useless extension candidates. Maximal degree in co-relation 43865. Up to 4711 conditions per place. [2024-06-21 18:00:32,689 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 98 changer transitions 0/451 dead transitions. [2024-06-21 18:00:32,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 451 transitions, 7086 flow [2024-06-21 18:00:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:00:32,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:00:32,690 INFO L175 Difference]: Start difference. First operand has 304 places, 429 transitions, 5928 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:00:32,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 451 transitions, 7086 flow [2024-06-21 18:00:33,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 451 transitions, 6953 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:33,780 INFO L231 Difference]: Finished difference. Result has 306 places, 429 transitions, 6010 flow [2024-06-21 18:00:33,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=306, PETRI_TRANSITIONS=429} [2024-06-21 18:00:33,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-21 18:00:33,781 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 429 transitions, 6010 flow [2024-06-21 18:00:33,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:33,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:33,781 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 18:00:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 18:00:33,781 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:33,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1106548545, now seen corresponding path program 2 times [2024-06-21 18:00:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:33,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873376735] [2024-06-21 18:00:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:34,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:34,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873376735] [2024-06-21 18:00:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873376735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:34,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643335521] [2024-06-21 18:00:34,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:34,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:34,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:34,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 429 transitions, 6010 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:34,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:34,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:35,755 INFO L124 PetriNetUnfolderBase]: 3297/5221 cut-off events. [2024-06-21 18:00:35,756 INFO L125 PetriNetUnfolderBase]: For 636238/636238 co-relation queries the response was YES. [2024-06-21 18:00:35,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44461 conditions, 5221 events. 3297/5221 cut-off events. For 636238/636238 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31098 event pairs, 697 based on Foata normal form. 2/5223 useless extension candidates. Maximal degree in co-relation 44317. Up to 4979 conditions per place. [2024-06-21 18:00:35,845 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 21 changer transitions 0/450 dead transitions. [2024-06-21 18:00:35,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 450 transitions, 7046 flow [2024-06-21 18:00:35,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:00:35,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:00:35,849 INFO L175 Difference]: Start difference. First operand has 306 places, 429 transitions, 6010 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:00:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 450 transitions, 7046 flow [2024-06-21 18:00:37,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 450 transitions, 6805 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:37,348 INFO L231 Difference]: Finished difference. Result has 307 places, 431 transitions, 5897 flow [2024-06-21 18:00:37,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5769, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=307, PETRI_TRANSITIONS=431} [2024-06-21 18:00:37,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 18:00:37,349 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 431 transitions, 5897 flow [2024-06-21 18:00:37,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:37,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:37,350 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 18:00:37,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 18:00:37,350 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:37,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:37,350 INFO L85 PathProgramCache]: Analyzing trace with hash -908138711, now seen corresponding path program 3 times [2024-06-21 18:00:37,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:37,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562291735] [2024-06-21 18:00:37,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:37,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:38,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:38,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562291735] [2024-06-21 18:00:38,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562291735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:38,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:38,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:38,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250880335] [2024-06-21 18:00:38,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:38,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:38,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:38,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:38,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 431 transitions, 5897 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:38,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:38,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:38,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:39,260 INFO L124 PetriNetUnfolderBase]: 3305/5229 cut-off events. [2024-06-21 18:00:39,260 INFO L125 PetriNetUnfolderBase]: For 650038/650038 co-relation queries the response was YES. [2024-06-21 18:00:39,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44448 conditions, 5229 events. 3305/5229 cut-off events. For 650038/650038 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31132 event pairs, 694 based on Foata normal form. 2/5231 useless extension candidates. Maximal degree in co-relation 44304. Up to 4984 conditions per place. [2024-06-21 18:00:39,337 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 26 changer transitions 0/450 dead transitions. [2024-06-21 18:00:39,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 450 transitions, 6927 flow [2024-06-21 18:00:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:00:39,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:00:39,338 INFO L175 Difference]: Start difference. First operand has 307 places, 431 transitions, 5897 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:00:39,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 450 transitions, 6927 flow [2024-06-21 18:00:40,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 450 transitions, 6817 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:40,614 INFO L231 Difference]: Finished difference. Result has 309 places, 433 transitions, 5928 flow [2024-06-21 18:00:40,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5928, PETRI_PLACES=309, PETRI_TRANSITIONS=433} [2024-06-21 18:00:40,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 18:00:40,614 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 433 transitions, 5928 flow [2024-06-21 18:00:40,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:40,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:40,615 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 18:00:40,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 18:00:40,615 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:40,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:40,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1591303555, now seen corresponding path program 1 times [2024-06-21 18:00:40,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:40,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416613677] [2024-06-21 18:00:40,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:40,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:00:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416613677] [2024-06-21 18:00:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416613677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115428069] [2024-06-21 18:00:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:41,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:41,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 433 transitions, 5928 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:41,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:41,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:41,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:42,544 INFO L124 PetriNetUnfolderBase]: 3403/5385 cut-off events. [2024-06-21 18:00:42,544 INFO L125 PetriNetUnfolderBase]: For 764192/764192 co-relation queries the response was YES. [2024-06-21 18:00:42,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45987 conditions, 5385 events. 3403/5385 cut-off events. For 764192/764192 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32229 event pairs, 706 based on Foata normal form. 24/5408 useless extension candidates. Maximal degree in co-relation 45842. Up to 4617 conditions per place. [2024-06-21 18:00:42,628 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 316 selfloop transitions, 140 changer transitions 0/461 dead transitions. [2024-06-21 18:00:42,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 461 transitions, 7234 flow [2024-06-21 18:00:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 18:00:42,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 18:00:42,629 INFO L175 Difference]: Start difference. First operand has 309 places, 433 transitions, 5928 flow. Second operand 9 states and 160 transitions. [2024-06-21 18:00:42,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 461 transitions, 7234 flow [2024-06-21 18:00:44,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 461 transitions, 7109 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:44,300 INFO L231 Difference]: Finished difference. Result has 312 places, 436 transitions, 6197 flow [2024-06-21 18:00:44,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6197, PETRI_PLACES=312, PETRI_TRANSITIONS=436} [2024-06-21 18:00:44,301 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-21 18:00:44,301 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 436 transitions, 6197 flow [2024-06-21 18:00:44,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:44,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:44,301 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 18:00:44,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 18:00:44,301 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:44,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1731205311, now seen corresponding path program 4 times [2024-06-21 18:00:44,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:44,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274255356] [2024-06-21 18:00:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:44,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:45,033 INFO 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 18:00:45,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:45,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274255356] [2024-06-21 18:00:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274255356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549344112] [2024-06-21 18:00:45,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:45,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:45,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:45,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:45,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:45,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:45,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 436 transitions, 6197 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:45,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:45,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:45,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:46,135 INFO L124 PetriNetUnfolderBase]: 3398/5381 cut-off events. [2024-06-21 18:00:46,135 INFO L125 PetriNetUnfolderBase]: For 678654/678656 co-relation queries the response was YES. [2024-06-21 18:00:46,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46407 conditions, 5381 events. 3398/5381 cut-off events. For 678654/678656 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 32224 event pairs, 711 based on Foata normal form. 2/5383 useless extension candidates. Maximal degree in co-relation 46261. Up to 5119 conditions per place. [2024-06-21 18:00:46,218 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 33 changer transitions 0/452 dead transitions. [2024-06-21 18:00:46,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 452 transitions, 7223 flow [2024-06-21 18:00:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:00:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:00:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 18:00:46,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 18:00:46,220 INFO L175 Difference]: Start difference. First operand has 312 places, 436 transitions, 6197 flow. Second operand 8 states and 131 transitions. [2024-06-21 18:00:46,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 452 transitions, 7223 flow [2024-06-21 18:00:47,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 452 transitions, 6875 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 18:00:47,869 INFO L231 Difference]: Finished difference. Result has 313 places, 438 transitions, 6010 flow [2024-06-21 18:00:47,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6010, PETRI_PLACES=313, PETRI_TRANSITIONS=438} [2024-06-21 18:00:47,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 18:00:47,869 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 438 transitions, 6010 flow [2024-06-21 18:00:47,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:47,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:47,870 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 18:00:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 18:00:47,870 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:47,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash -119576853, now seen corresponding path program 2 times [2024-06-21 18:00:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:47,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854342832] [2024-06-21 18:00:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:48,653 INFO 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 18:00:48,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:48,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854342832] [2024-06-21 18:00:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854342832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:48,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768933076] [2024-06-21 18:00:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:48,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:48,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:48,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 438 transitions, 6010 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:48,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:48,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:48,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:49,865 INFO L124 PetriNetUnfolderBase]: 3414/5403 cut-off events. [2024-06-21 18:00:49,865 INFO L125 PetriNetUnfolderBase]: For 692600/692604 co-relation queries the response was YES. [2024-06-21 18:00:49,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45821 conditions, 5403 events. 3414/5403 cut-off events. For 692600/692604 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32381 event pairs, 719 based on Foata normal form. 8/5410 useless extension candidates. Maximal degree in co-relation 45674. Up to 5039 conditions per place. [2024-06-21 18:00:49,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 69 changer transitions 0/455 dead transitions. [2024-06-21 18:00:49,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 455 transitions, 7064 flow [2024-06-21 18:00:49,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 18:00:49,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 18:00:49,954 INFO L175 Difference]: Start difference. First operand has 313 places, 438 transitions, 6010 flow. Second operand 9 states and 147 transitions. [2024-06-21 18:00:49,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 455 transitions, 7064 flow [2024-06-21 18:00:51,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 455 transitions, 6919 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:51,750 INFO L231 Difference]: Finished difference. Result has 316 places, 441 transitions, 6123 flow [2024-06-21 18:00:51,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6123, PETRI_PLACES=316, PETRI_TRANSITIONS=441} [2024-06-21 18:00:51,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-21 18:00:51,751 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 441 transitions, 6123 flow [2024-06-21 18:00:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:51,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:51,751 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 18:00:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 18:00:51,752 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:51,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:51,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1959284401, now seen corresponding path program 1 times [2024-06-21 18:00:51,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:51,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893553706] [2024-06-21 18:00:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:51,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:52,533 INFO 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 18:00:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893553706] [2024-06-21 18:00:52,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893553706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:52,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:52,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:52,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725004562] [2024-06-21 18:00:52,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:52,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:52,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:52,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:52,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:52,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:52,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 441 transitions, 6123 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:52,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:52,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:52,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:53,684 INFO L124 PetriNetUnfolderBase]: 3402/5382 cut-off events. [2024-06-21 18:00:53,684 INFO L125 PetriNetUnfolderBase]: For 689096/689098 co-relation queries the response was YES. [2024-06-21 18:00:53,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45567 conditions, 5382 events. 3402/5382 cut-off events. For 689096/689098 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32182 event pairs, 734 based on Foata normal form. 4/5385 useless extension candidates. Maximal degree in co-relation 45419. Up to 4583 conditions per place. [2024-06-21 18:00:53,760 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 269 selfloop transitions, 185 changer transitions 0/459 dead transitions. [2024-06-21 18:00:53,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 459 transitions, 7287 flow [2024-06-21 18:00:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 18:00:53,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 18:00:53,761 INFO L175 Difference]: Start difference. First operand has 316 places, 441 transitions, 6123 flow. Second operand 9 states and 156 transitions. [2024-06-21 18:00:53,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 459 transitions, 7287 flow [2024-06-21 18:00:55,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 459 transitions, 7008 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:55,525 INFO L231 Difference]: Finished difference. Result has 320 places, 442 transitions, 6236 flow [2024-06-21 18:00:55,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6236, PETRI_PLACES=320, PETRI_TRANSITIONS=442} [2024-06-21 18:00:55,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-21 18:00:55,526 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 442 transitions, 6236 flow [2024-06-21 18:00:55,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:55,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:55,526 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 18:00:55,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 18:00:55,526 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:55,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:55,527 INFO L85 PathProgramCache]: Analyzing trace with hash -599884835, now seen corresponding path program 3 times [2024-06-21 18:00:55,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:55,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685742372] [2024-06-21 18:00:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:55,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:00:56,243 INFO 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 18:00:56,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:00:56,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685742372] [2024-06-21 18:00:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685742372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:00:56,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:00:56,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:00:56,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194818129] [2024-06-21 18:00:56,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:00:56,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:00:56,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:00:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:00:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:00:56,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:00:56,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 442 transitions, 6236 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:56,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:00:56,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:00:56,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:00:57,496 INFO L124 PetriNetUnfolderBase]: 3490/5528 cut-off events. [2024-06-21 18:00:57,496 INFO L125 PetriNetUnfolderBase]: For 804445/804447 co-relation queries the response was YES. [2024-06-21 18:00:57,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47258 conditions, 5528 events. 3490/5528 cut-off events. For 804445/804447 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 33206 event pairs, 752 based on Foata normal form. 24/5551 useless extension candidates. Maximal degree in co-relation 47108. Up to 4617 conditions per place. [2024-06-21 18:00:57,578 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 271 selfloop transitions, 191 changer transitions 0/467 dead transitions. [2024-06-21 18:00:57,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 467 transitions, 7560 flow [2024-06-21 18:00:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:00:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:00:57,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:00:57,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:00:57,579 INFO L175 Difference]: Start difference. First operand has 320 places, 442 transitions, 6236 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:00:57,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 467 transitions, 7560 flow [2024-06-21 18:00:59,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 467 transitions, 7281 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 18:00:59,345 INFO L231 Difference]: Finished difference. Result has 323 places, 445 transitions, 6467 flow [2024-06-21 18:00:59,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5957, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6467, PETRI_PLACES=323, PETRI_TRANSITIONS=445} [2024-06-21 18:00:59,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-21 18:00:59,346 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 445 transitions, 6467 flow [2024-06-21 18:00:59,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:00:59,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:00:59,346 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 18:00:59,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 18:00:59,346 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:00:59,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:00:59,347 INFO L85 PathProgramCache]: Analyzing trace with hash -369668915, now seen corresponding path program 4 times [2024-06-21 18:00:59,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:00:59,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477565436] [2024-06-21 18:00:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:00:59,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:00:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:00,013 INFO 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 18:01:00,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:00,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477565436] [2024-06-21 18:01:00,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477565436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:00,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:00,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:00,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903987630] [2024-06-21 18:01:00,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:00,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:00,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:00,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 445 transitions, 6467 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:00,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:00,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:00,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:01,289 INFO L124 PetriNetUnfolderBase]: 3637/5746 cut-off events. [2024-06-21 18:01:01,290 INFO L125 PetriNetUnfolderBase]: For 848605/848607 co-relation queries the response was YES. [2024-06-21 18:01:01,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52121 conditions, 5746 events. 3637/5746 cut-off events. For 848605/848607 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34598 event pairs, 764 based on Foata normal form. 4/5749 useless extension candidates. Maximal degree in co-relation 51970. Up to 4457 conditions per place. [2024-06-21 18:01:01,373 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 227 changer transitions 0/475 dead transitions. [2024-06-21 18:01:01,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 475 transitions, 8143 flow [2024-06-21 18:01:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 18:01:01,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-21 18:01:01,376 INFO L175 Difference]: Start difference. First operand has 323 places, 445 transitions, 6467 flow. Second operand 9 states and 163 transitions. [2024-06-21 18:01:01,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 475 transitions, 8143 flow [2024-06-21 18:01:03,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 475 transitions, 7679 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:03,495 INFO L231 Difference]: Finished difference. Result has 326 places, 452 transitions, 6748 flow [2024-06-21 18:01:03,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6003, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6748, PETRI_PLACES=326, PETRI_TRANSITIONS=452} [2024-06-21 18:01:03,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-21 18:01:03,496 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 452 transitions, 6748 flow [2024-06-21 18:01:03,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:03,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:03,496 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 18:01:03,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 18:01:03,496 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:03,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:03,497 INFO L85 PathProgramCache]: Analyzing trace with hash -369965585, now seen corresponding path program 5 times [2024-06-21 18:01:03,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:03,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067455869] [2024-06-21 18:01:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:03,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:04,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:04,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067455869] [2024-06-21 18:01:04,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067455869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:04,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:04,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:04,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140371588] [2024-06-21 18:01:04,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:04,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:04,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:04,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:04,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:04,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:04,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 452 transitions, 6748 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:04,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:04,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:05,537 INFO L124 PetriNetUnfolderBase]: 3627/5737 cut-off events. [2024-06-21 18:01:05,537 INFO L125 PetriNetUnfolderBase]: For 836348/836350 co-relation queries the response was YES. [2024-06-21 18:01:05,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51594 conditions, 5737 events. 3627/5737 cut-off events. For 836348/836350 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34633 event pairs, 787 based on Foata normal form. 4/5740 useless extension candidates. Maximal degree in co-relation 51441. Up to 4823 conditions per place. [2024-06-21 18:01:05,611 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 252 selfloop transitions, 214 changer transitions 0/471 dead transitions. [2024-06-21 18:01:05,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 471 transitions, 8022 flow [2024-06-21 18:01:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 18:01:05,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-21 18:01:05,612 INFO L175 Difference]: Start difference. First operand has 326 places, 452 transitions, 6748 flow. Second operand 9 states and 157 transitions. [2024-06-21 18:01:05,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 471 transitions, 8022 flow [2024-06-21 18:01:08,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 471 transitions, 7556 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:08,057 INFO L231 Difference]: Finished difference. Result has 329 places, 454 transitions, 6810 flow [2024-06-21 18:01:08,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6292, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6810, PETRI_PLACES=329, PETRI_TRANSITIONS=454} [2024-06-21 18:01:08,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-21 18:01:08,057 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 454 transitions, 6810 flow [2024-06-21 18:01:08,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:08,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:08,058 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 18:01:08,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 18:01:08,058 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:08,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1488364749, now seen corresponding path program 1 times [2024-06-21 18:01:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:08,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663771677] [2024-06-21 18:01:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:08,544 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 18:01:08,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:08,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663771677] [2024-06-21 18:01:08,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663771677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:08,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:08,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476956552] [2024-06-21 18:01:08,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:08,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:08,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:08,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:08,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 454 transitions, 6810 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:08,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:08,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:08,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:09,808 INFO L124 PetriNetUnfolderBase]: 3632/5745 cut-off events. [2024-06-21 18:01:09,808 INFO L125 PetriNetUnfolderBase]: For 830018/830018 co-relation queries the response was YES. [2024-06-21 18:01:09,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51780 conditions, 5745 events. 3632/5745 cut-off events. For 830018/830018 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34698 event pairs, 759 based on Foata normal form. 1/5746 useless extension candidates. Maximal degree in co-relation 51626. Up to 5467 conditions per place. [2024-06-21 18:01:09,890 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 450 selfloop transitions, 28 changer transitions 0/483 dead transitions. [2024-06-21 18:01:09,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 483 transitions, 7951 flow [2024-06-21 18:01:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:01:09,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:01:09,891 INFO L175 Difference]: Start difference. First operand has 329 places, 454 transitions, 6810 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:01:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 483 transitions, 7951 flow [2024-06-21 18:01:12,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 483 transitions, 7422 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 18:01:12,232 INFO L231 Difference]: Finished difference. Result has 330 places, 457 transitions, 6435 flow [2024-06-21 18:01:12,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6281, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6435, PETRI_PLACES=330, PETRI_TRANSITIONS=457} [2024-06-21 18:01:12,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-21 18:01:12,232 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 457 transitions, 6435 flow [2024-06-21 18:01:12,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:12,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:12,233 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 18:01:12,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 18:01:12,233 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:12,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:12,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1608723041, now seen corresponding path program 2 times [2024-06-21 18:01:12,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:12,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161856025] [2024-06-21 18:01:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:12,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:12,721 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 18:01:12,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:12,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161856025] [2024-06-21 18:01:12,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161856025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:12,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:12,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955430721] [2024-06-21 18:01:12,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:12,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:12,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:12,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:12,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 457 transitions, 6435 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:12,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:12,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:12,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:14,014 INFO L124 PetriNetUnfolderBase]: 3642/5755 cut-off events. [2024-06-21 18:01:14,014 INFO L125 PetriNetUnfolderBase]: For 842813/842813 co-relation queries the response was YES. [2024-06-21 18:01:14,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51476 conditions, 5755 events. 3642/5755 cut-off events. For 842813/842813 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34677 event pairs, 758 based on Foata normal form. 1/5756 useless extension candidates. Maximal degree in co-relation 51321. Up to 5473 conditions per place. [2024-06-21 18:01:14,098 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 34 changer transitions 0/490 dead transitions. [2024-06-21 18:01:14,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 490 transitions, 7623 flow [2024-06-21 18:01:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:14,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:01:14,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:01:14,099 INFO L175 Difference]: Start difference. First operand has 330 places, 457 transitions, 6435 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:01:14,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 490 transitions, 7623 flow [2024-06-21 18:01:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 490 transitions, 7495 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:16,639 INFO L231 Difference]: Finished difference. Result has 334 places, 463 transitions, 6519 flow [2024-06-21 18:01:16,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6307, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6519, PETRI_PLACES=334, PETRI_TRANSITIONS=463} [2024-06-21 18:01:16,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-21 18:01:16,640 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 463 transitions, 6519 flow [2024-06-21 18:01:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:16,640 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 18:01:16,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 18:01:16,641 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1617296897, now seen corresponding path program 1 times [2024-06-21 18:01:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184322115] [2024-06-21 18:01:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:16,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:17,118 INFO 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 18:01:17,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:17,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184322115] [2024-06-21 18:01:17,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184322115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:17,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:17,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:17,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670844751] [2024-06-21 18:01:17,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:17,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:17,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:17,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:17,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:17,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:17,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 463 transitions, 6519 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:17,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:17,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:17,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:18,487 INFO L124 PetriNetUnfolderBase]: 3637/5748 cut-off events. [2024-06-21 18:01:18,488 INFO L125 PetriNetUnfolderBase]: For 855106/855106 co-relation queries the response was YES. [2024-06-21 18:01:18,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51631 conditions, 5748 events. 3637/5748 cut-off events. For 855106/855106 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34619 event pairs, 648 based on Foata normal form. 2/5750 useless extension candidates. Maximal degree in co-relation 51474. Up to 5457 conditions per place. [2024-06-21 18:01:18,573 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 21 changer transitions 0/492 dead transitions. [2024-06-21 18:01:18,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 492 transitions, 7651 flow [2024-06-21 18:01:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:01:18,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:01:18,575 INFO L175 Difference]: Start difference. First operand has 334 places, 463 transitions, 6519 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:01:18,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 492 transitions, 7651 flow [2024-06-21 18:01:20,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 492 transitions, 7510 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:20,920 INFO L231 Difference]: Finished difference. Result has 336 places, 465 transitions, 6487 flow [2024-06-21 18:01:20,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6487, PETRI_PLACES=336, PETRI_TRANSITIONS=465} [2024-06-21 18:01:20,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-21 18:01:20,920 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 465 transitions, 6487 flow [2024-06-21 18:01:20,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:20,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:20,920 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 18:01:20,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 18:01:20,921 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:20,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:20,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1617057887, now seen corresponding path program 2 times [2024-06-21 18:01:20,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:20,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965129803] [2024-06-21 18:01:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:20,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:21,433 INFO 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 18:01:21,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965129803] [2024-06-21 18:01:21,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965129803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:21,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993244646] [2024-06-21 18:01:21,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:21,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:21,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:21,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:21,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 465 transitions, 6487 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:21,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:21,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:21,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:22,721 INFO L124 PetriNetUnfolderBase]: 3645/5760 cut-off events. [2024-06-21 18:01:22,721 INFO L125 PetriNetUnfolderBase]: For 870244/870244 co-relation queries the response was YES. [2024-06-21 18:01:22,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51911 conditions, 5760 events. 3645/5760 cut-off events. For 870244/870244 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 34781 event pairs, 762 based on Foata normal form. 2/5762 useless extension candidates. Maximal degree in co-relation 51753. Up to 5502 conditions per place. [2024-06-21 18:01:22,960 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 22 changer transitions 0/490 dead transitions. [2024-06-21 18:01:22,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 490 transitions, 7603 flow [2024-06-21 18:01:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:01:22,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:01:22,962 INFO L175 Difference]: Start difference. First operand has 336 places, 465 transitions, 6487 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:01:22,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 490 transitions, 7603 flow [2024-06-21 18:01:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 490 transitions, 7510 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:25,383 INFO L231 Difference]: Finished difference. Result has 338 places, 467 transitions, 6509 flow [2024-06-21 18:01:25,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6509, PETRI_PLACES=338, PETRI_TRANSITIONS=467} [2024-06-21 18:01:25,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 18:01:25,383 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 467 transitions, 6509 flow [2024-06-21 18:01:25,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:25,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:25,384 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 18:01:25,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 18:01:25,384 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:25,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1856603451, now seen corresponding path program 3 times [2024-06-21 18:01:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:25,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907518892] [2024-06-21 18:01:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:25,830 INFO 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 18:01:25,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:25,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907518892] [2024-06-21 18:01:25,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907518892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:25,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:25,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:25,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831177717] [2024-06-21 18:01:25,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:25,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:25,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:25,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:25,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:25,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:25,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 467 transitions, 6509 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:25,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:25,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:25,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:27,159 INFO L124 PetriNetUnfolderBase]: 3650/5770 cut-off events. [2024-06-21 18:01:27,160 INFO L125 PetriNetUnfolderBase]: For 882584/882588 co-relation queries the response was YES. [2024-06-21 18:01:27,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52160 conditions, 5770 events. 3650/5770 cut-off events. For 882584/882588 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34866 event pairs, 746 based on Foata normal form. 5/5775 useless extension candidates. Maximal degree in co-relation 52001. Up to 5428 conditions per place. [2024-06-21 18:01:27,252 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 45 changer transitions 0/495 dead transitions. [2024-06-21 18:01:27,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 495 transitions, 7690 flow [2024-06-21 18:01:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:01:27,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:01:27,253 INFO L175 Difference]: Start difference. First operand has 338 places, 467 transitions, 6509 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:01:27,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 495 transitions, 7690 flow [2024-06-21 18:01:29,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 495 transitions, 7587 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:29,619 INFO L231 Difference]: Finished difference. Result has 340 places, 470 transitions, 6608 flow [2024-06-21 18:01:29,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6608, PETRI_PLACES=340, PETRI_TRANSITIONS=470} [2024-06-21 18:01:29,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-21 18:01:29,619 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 470 transitions, 6608 flow [2024-06-21 18:01:29,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:29,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:29,620 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 18:01:29,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 18:01:29,620 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:29,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1305262803, now seen corresponding path program 4 times [2024-06-21 18:01:29,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:29,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113408319] [2024-06-21 18:01:29,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:30,120 INFO 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 18:01:30,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:30,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113408319] [2024-06-21 18:01:30,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113408319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:30,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:30,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:30,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13108165] [2024-06-21 18:01:30,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:30,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:30,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:30,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:30,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:30,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:30,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 470 transitions, 6608 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:30,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:30,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:30,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:31,442 INFO L124 PetriNetUnfolderBase]: 3655/5777 cut-off events. [2024-06-21 18:01:31,443 INFO L125 PetriNetUnfolderBase]: For 900010/900014 co-relation queries the response was YES. [2024-06-21 18:01:31,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52703 conditions, 5777 events. 3655/5777 cut-off events. For 900010/900014 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34923 event pairs, 748 based on Foata normal form. 5/5782 useless extension candidates. Maximal degree in co-relation 52543. Up to 5418 conditions per place. [2024-06-21 18:01:31,540 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 51 changer transitions 0/495 dead transitions. [2024-06-21 18:01:31,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 495 transitions, 7781 flow [2024-06-21 18:01:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 18:01:31,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 18:01:31,541 INFO L175 Difference]: Start difference. First operand has 340 places, 470 transitions, 6608 flow. Second operand 8 states and 138 transitions. [2024-06-21 18:01:31,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 495 transitions, 7781 flow [2024-06-21 18:01:33,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 495 transitions, 7601 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:33,954 INFO L231 Difference]: Finished difference. Result has 342 places, 473 transitions, 6648 flow [2024-06-21 18:01:33,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6648, PETRI_PLACES=342, PETRI_TRANSITIONS=473} [2024-06-21 18:01:33,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 18:01:33,955 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 473 transitions, 6648 flow [2024-06-21 18:01:33,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:33,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:33,955 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 18:01:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 18:01:33,955 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:33,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash -131682913, now seen corresponding path program 5 times [2024-06-21 18:01:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:33,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634774448] [2024-06-21 18:01:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:33,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:34,470 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 18:01:34,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:34,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634774448] [2024-06-21 18:01:34,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634774448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:34,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:34,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:34,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744216525] [2024-06-21 18:01:34,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:34,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:34,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:34,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:34,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:34,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:34,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 473 transitions, 6648 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:34,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:34,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:34,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:35,856 INFO L124 PetriNetUnfolderBase]: 3660/5784 cut-off events. [2024-06-21 18:01:35,857 INFO L125 PetriNetUnfolderBase]: For 917793/917793 co-relation queries the response was YES. [2024-06-21 18:01:35,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53196 conditions, 5784 events. 3660/5784 cut-off events. For 917793/917793 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 34964 event pairs, 758 based on Foata normal form. 1/5785 useless extension candidates. Maximal degree in co-relation 53035. Up to 5518 conditions per place. [2024-06-21 18:01:35,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 461 selfloop transitions, 27 changer transitions 0/493 dead transitions. [2024-06-21 18:01:35,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 493 transitions, 7798 flow [2024-06-21 18:01:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:01:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:01:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:01:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:01:35,944 INFO L175 Difference]: Start difference. First operand has 342 places, 473 transitions, 6648 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:01:35,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 493 transitions, 7798 flow [2024-06-21 18:01:38,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 493 transitions, 7600 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:38,177 INFO L231 Difference]: Finished difference. Result has 344 places, 476 transitions, 6628 flow [2024-06-21 18:01:38,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6628, PETRI_PLACES=344, PETRI_TRANSITIONS=476} [2024-06-21 18:01:38,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-21 18:01:38,177 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 476 transitions, 6628 flow [2024-06-21 18:01:38,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:38,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:38,178 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 18:01:38,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 18:01:38,178 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:38,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:38,178 INFO L85 PathProgramCache]: Analyzing trace with hash -126921313, now seen corresponding path program 6 times [2024-06-21 18:01:38,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:38,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688554815] [2024-06-21 18:01:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:38,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688554815] [2024-06-21 18:01:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688554815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:38,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:38,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:38,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828650918] [2024-06-21 18:01:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:38,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:38,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:38,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 476 transitions, 6628 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:38,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:38,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:38,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:40,114 INFO L124 PetriNetUnfolderBase]: 3792/5994 cut-off events. [2024-06-21 18:01:40,114 INFO L125 PetriNetUnfolderBase]: For 942838/942842 co-relation queries the response was YES. [2024-06-21 18:01:40,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55192 conditions, 5994 events. 3792/5994 cut-off events. For 942838/942842 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 36364 event pairs, 758 based on Foata normal form. 5/5997 useless extension candidates. Maximal degree in co-relation 55030. Up to 5537 conditions per place. [2024-06-21 18:01:40,213 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 460 selfloop transitions, 93 changer transitions 0/558 dead transitions. [2024-06-21 18:01:40,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 558 transitions, 9019 flow [2024-06-21 18:01:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 18:01:40,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-21 18:01:40,214 INFO L175 Difference]: Start difference. First operand has 344 places, 476 transitions, 6628 flow. Second operand 9 states and 149 transitions. [2024-06-21 18:01:40,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 558 transitions, 9019 flow [2024-06-21 18:01:42,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 558 transitions, 8675 flow, removed 118 selfloop flow, removed 6 redundant places. [2024-06-21 18:01:42,964 INFO L231 Difference]: Finished difference. Result has 351 places, 531 transitions, 7487 flow [2024-06-21 18:01:42,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6451, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7487, PETRI_PLACES=351, PETRI_TRANSITIONS=531} [2024-06-21 18:01:42,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-21 18:01:42,964 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 531 transitions, 7487 flow [2024-06-21 18:01:42,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:42,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:42,964 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 18:01:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 18:01:42,965 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:42,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:42,965 INFO L85 PathProgramCache]: Analyzing trace with hash 814462465, now seen corresponding path program 7 times [2024-06-21 18:01:42,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:42,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944916426] [2024-06-21 18:01:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:43,458 INFO 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 18:01:43,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:43,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944916426] [2024-06-21 18:01:43,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944916426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:43,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:43,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:43,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211552098] [2024-06-21 18:01:43,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:43,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:43,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:43,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:43,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:43,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 531 transitions, 7487 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:43,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:43,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:43,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:44,885 INFO L124 PetriNetUnfolderBase]: 3893/6155 cut-off events. [2024-06-21 18:01:44,885 INFO L125 PetriNetUnfolderBase]: For 973018/973022 co-relation queries the response was YES. [2024-06-21 18:01:44,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57192 conditions, 6155 events. 3893/6155 cut-off events. For 973018/973022 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37605 event pairs, 764 based on Foata normal form. 5/6160 useless extension candidates. Maximal degree in co-relation 57026. Up to 5635 conditions per place. [2024-06-21 18:01:44,985 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 466 selfloop transitions, 141 changer transitions 0/612 dead transitions. [2024-06-21 18:01:44,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 612 transitions, 9965 flow [2024-06-21 18:01:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 18:01:44,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 18:01:44,986 INFO L175 Difference]: Start difference. First operand has 351 places, 531 transitions, 7487 flow. Second operand 9 states and 156 transitions. [2024-06-21 18:01:44,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 612 transitions, 9965 flow [2024-06-21 18:01:47,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 612 transitions, 9711 flow, removed 126 selfloop flow, removed 1 redundant places. [2024-06-21 18:01:47,949 INFO L231 Difference]: Finished difference. Result has 362 places, 587 transitions, 8623 flow [2024-06-21 18:01:47,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7359, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8623, PETRI_PLACES=362, PETRI_TRANSITIONS=587} [2024-06-21 18:01:47,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 18:01:47,949 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 587 transitions, 8623 flow [2024-06-21 18:01:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:47,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:47,949 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 18:01:47,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 18:01:47,950 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:47,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -524353245, now seen corresponding path program 3 times [2024-06-21 18:01:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:47,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308484637] [2024-06-21 18:01:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:48,479 INFO 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 18:01:48,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:48,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308484637] [2024-06-21 18:01:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308484637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:48,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:48,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690818090] [2024-06-21 18:01:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:48,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:48,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:48,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 587 transitions, 8623 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:48,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:48,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:48,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:49,977 INFO L124 PetriNetUnfolderBase]: 3901/6164 cut-off events. [2024-06-21 18:01:49,978 INFO L125 PetriNetUnfolderBase]: For 999562/999562 co-relation queries the response was YES. [2024-06-21 18:01:50,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58370 conditions, 6164 events. 3901/6164 cut-off events. For 999562/999562 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37652 event pairs, 751 based on Foata normal form. 2/6166 useless extension candidates. Maximal degree in co-relation 58198. Up to 5832 conditions per place. [2024-06-21 18:01:50,079 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 559 selfloop transitions, 48 changer transitions 0/612 dead transitions. [2024-06-21 18:01:50,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 612 transitions, 10017 flow [2024-06-21 18:01:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:50,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 18:01:50,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 18:01:50,080 INFO L175 Difference]: Start difference. First operand has 362 places, 587 transitions, 8623 flow. Second operand 9 states and 150 transitions. [2024-06-21 18:01:50,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 612 transitions, 10017 flow [2024-06-21 18:01:52,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 612 transitions, 9788 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-21 18:01:52,709 INFO L231 Difference]: Finished difference. Result has 370 places, 592 transitions, 8645 flow [2024-06-21 18:01:52,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8394, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8645, PETRI_PLACES=370, PETRI_TRANSITIONS=592} [2024-06-21 18:01:52,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-21 18:01:52,710 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 592 transitions, 8645 flow [2024-06-21 18:01:52,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:52,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:52,710 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 18:01:52,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 18:01:52,710 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:52,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 157018713, now seen corresponding path program 1 times [2024-06-21 18:01:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:52,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934998164] [2024-06-21 18:01:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:53,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:53,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934998164] [2024-06-21 18:01:53,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934998164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:53,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:53,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:01:53,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219905568] [2024-06-21 18:01:53,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:53,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:01:53,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:53,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:01:53,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:01:53,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:53,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 592 transitions, 8645 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:53,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:53,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:53,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:01:55,034 INFO L124 PetriNetUnfolderBase]: 3916/6198 cut-off events. [2024-06-21 18:01:55,034 INFO L125 PetriNetUnfolderBase]: For 1009907/1009909 co-relation queries the response was YES. [2024-06-21 18:01:55,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58626 conditions, 6198 events. 3916/6198 cut-off events. For 1009907/1009909 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38022 event pairs, 841 based on Foata normal form. 1/6199 useless extension candidates. Maximal degree in co-relation 58451. Up to 5742 conditions per place. [2024-06-21 18:01:55,137 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 547 selfloop transitions, 76 changer transitions 0/628 dead transitions. [2024-06-21 18:01:55,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 628 transitions, 10147 flow [2024-06-21 18:01:55,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:01:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:01:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 18:01:55,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:01:55,138 INFO L175 Difference]: Start difference. First operand has 370 places, 592 transitions, 8645 flow. Second operand 9 states and 164 transitions. [2024-06-21 18:01:55,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 628 transitions, 10147 flow [2024-06-21 18:01:58,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 628 transitions, 10036 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-21 18:01:58,009 INFO L231 Difference]: Finished difference. Result has 376 places, 598 transitions, 8839 flow [2024-06-21 18:01:58,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8534, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8839, PETRI_PLACES=376, PETRI_TRANSITIONS=598} [2024-06-21 18:01:58,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-21 18:01:58,010 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 598 transitions, 8839 flow [2024-06-21 18:01:58,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:58,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:01:58,010 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 18:01:58,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 18:01:58,010 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:01:58,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:01:58,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1110725589, now seen corresponding path program 4 times [2024-06-21 18:01:58,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:01:58,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077125371] [2024-06-21 18:01:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:01:58,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:01:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:01:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:01:58,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:01:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077125371] [2024-06-21 18:01:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077125371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:01:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:01:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:01:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992909257] [2024-06-21 18:01:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:01:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:01:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:01:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:01:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:01:58,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:01:58,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 598 transitions, 8839 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:01:58,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:01:58,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:01:58,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:00,080 INFO L124 PetriNetUnfolderBase]: 3911/6173 cut-off events. [2024-06-21 18:02:00,081 INFO L125 PetriNetUnfolderBase]: For 1020077/1020077 co-relation queries the response was YES. [2024-06-21 18:02:00,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58488 conditions, 6173 events. 3911/6173 cut-off events. For 1020077/1020077 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37651 event pairs, 762 based on Foata normal form. 2/6175 useless extension candidates. Maximal degree in co-relation 58312. Up to 5831 conditions per place. [2024-06-21 18:02:00,179 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 556 selfloop transitions, 55 changer transitions 0/616 dead transitions. [2024-06-21 18:02:00,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 616 transitions, 10197 flow [2024-06-21 18:02:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:00,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:00,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:02:00,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:02:00,180 INFO L175 Difference]: Start difference. First operand has 376 places, 598 transitions, 8839 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:02:00,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 616 transitions, 10197 flow [2024-06-21 18:02:03,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 616 transitions, 10036 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 18:02:03,195 INFO L231 Difference]: Finished difference. Result has 377 places, 600 transitions, 8881 flow [2024-06-21 18:02:03,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8678, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8881, PETRI_PLACES=377, PETRI_TRANSITIONS=600} [2024-06-21 18:02:03,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-21 18:02:03,195 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 600 transitions, 8881 flow [2024-06-21 18:02:03,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:03,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:03,195 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 18:02:03,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 18:02:03,196 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:03,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:03,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1934574679, now seen corresponding path program 8 times [2024-06-21 18:02:03,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:03,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495652369] [2024-06-21 18:02:03,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:03,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:03,647 INFO 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 18:02:03,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:03,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495652369] [2024-06-21 18:02:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495652369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:03,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:03,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451394507] [2024-06-21 18:02:03,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:03,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:03,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:03,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:03,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:03,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:03,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 600 transitions, 8881 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:03,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:03,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:03,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:05,415 INFO L124 PetriNetUnfolderBase]: 3921/6190 cut-off events. [2024-06-21 18:02:05,415 INFO L125 PetriNetUnfolderBase]: For 1038410/1038410 co-relation queries the response was YES. [2024-06-21 18:02:05,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58842 conditions, 6190 events. 3921/6190 cut-off events. For 1038410/1038410 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37783 event pairs, 750 based on Foata normal form. 2/6189 useless extension candidates. Maximal degree in co-relation 58666. Up to 5758 conditions per place. [2024-06-21 18:02:05,509 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 541 selfloop transitions, 80 changer transitions 0/626 dead transitions. [2024-06-21 18:02:05,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 626 transitions, 10450 flow [2024-06-21 18:02:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:05,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 18:02:05,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 18:02:05,510 INFO L175 Difference]: Start difference. First operand has 377 places, 600 transitions, 8881 flow. Second operand 8 states and 137 transitions. [2024-06-21 18:02:05,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 626 transitions, 10450 flow [2024-06-21 18:02:08,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 626 transitions, 10296 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 18:02:08,791 INFO L231 Difference]: Finished difference. Result has 380 places, 606 transitions, 9147 flow [2024-06-21 18:02:08,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8727, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9147, PETRI_PLACES=380, PETRI_TRANSITIONS=606} [2024-06-21 18:02:08,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-21 18:02:08,792 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 606 transitions, 9147 flow [2024-06-21 18:02:08,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:08,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:08,792 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 18:02:08,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 18:02:08,792 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:08,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash 613194951, now seen corresponding path program 9 times [2024-06-21 18:02:08,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:08,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353447315] [2024-06-21 18:02:08,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:08,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:09,268 INFO 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 18:02:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353447315] [2024-06-21 18:02:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353447315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:09,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:09,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733535142] [2024-06-21 18:02:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:09,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:09,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:09,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:09,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 606 transitions, 9147 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:09,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:09,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:09,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:10,837 INFO L124 PetriNetUnfolderBase]: 3915/6182 cut-off events. [2024-06-21 18:02:10,837 INFO L125 PetriNetUnfolderBase]: For 1023451/1023451 co-relation queries the response was YES. [2024-06-21 18:02:10,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58428 conditions, 6182 events. 3915/6182 cut-off events. For 1023451/1023451 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37742 event pairs, 749 based on Foata normal form. 2/6181 useless extension candidates. Maximal degree in co-relation 58251. Up to 5738 conditions per place. [2024-06-21 18:02:10,951 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 530 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-21 18:02:10,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 624 transitions, 10468 flow [2024-06-21 18:02:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:02:10,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:02:10,952 INFO L175 Difference]: Start difference. First operand has 380 places, 606 transitions, 9147 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:02:10,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 624 transitions, 10468 flow [2024-06-21 18:02:14,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 624 transitions, 9988 flow, removed 164 selfloop flow, removed 6 redundant places. [2024-06-21 18:02:14,403 INFO L231 Difference]: Finished difference. Result has 382 places, 606 transitions, 8854 flow [2024-06-21 18:02:14,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8854, PETRI_PLACES=382, PETRI_TRANSITIONS=606} [2024-06-21 18:02:14,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-21 18:02:14,408 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 606 transitions, 8854 flow [2024-06-21 18:02:14,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:14,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:14,409 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 18:02:14,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 18:02:14,409 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:14,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 119694731, now seen corresponding path program 10 times [2024-06-21 18:02:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318341158] [2024-06-21 18:02:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:14,902 INFO 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 18:02:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318341158] [2024-06-21 18:02:14,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318341158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:14,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:14,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:14,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811934435] [2024-06-21 18:02:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:14,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:14,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 606 transitions, 8854 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:14,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:14,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:14,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:16,475 INFO L124 PetriNetUnfolderBase]: 3933/6211 cut-off events. [2024-06-21 18:02:16,475 INFO L125 PetriNetUnfolderBase]: For 1045831/1045831 co-relation queries the response was YES. [2024-06-21 18:02:16,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58793 conditions, 6211 events. 3933/6211 cut-off events. For 1045831/1045831 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 37943 event pairs, 748 based on Foata normal form. 2/6210 useless extension candidates. Maximal degree in co-relation 58615. Up to 5654 conditions per place. [2024-06-21 18:02:16,605 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 505 selfloop transitions, 118 changer transitions 0/628 dead transitions. [2024-06-21 18:02:16,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 628 transitions, 10619 flow [2024-06-21 18:02:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:16,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 18:02:16,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 18:02:16,607 INFO L175 Difference]: Start difference. First operand has 382 places, 606 transitions, 8854 flow. Second operand 8 states and 137 transitions. [2024-06-21 18:02:16,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 628 transitions, 10619 flow [2024-06-21 18:02:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 628 transitions, 10372 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 18:02:20,030 INFO L231 Difference]: Finished difference. Result has 384 places, 613 transitions, 9094 flow [2024-06-21 18:02:20,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8607, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9094, PETRI_PLACES=384, PETRI_TRANSITIONS=613} [2024-06-21 18:02:20,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-21 18:02:20,031 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 613 transitions, 9094 flow [2024-06-21 18:02:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:20,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:20,031 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 18:02:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 18:02:20,031 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:20,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash 7880095, now seen corresponding path program 11 times [2024-06-21 18:02:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:20,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053986334] [2024-06-21 18:02:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:20,572 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 18:02:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053986334] [2024-06-21 18:02:20,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053986334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:20,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:20,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:20,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171622357] [2024-06-21 18:02:20,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:20,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:20,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:20,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:20,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 613 transitions, 9094 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:20,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:20,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:20,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:22,066 INFO L124 PetriNetUnfolderBase]: 3967/6267 cut-off events. [2024-06-21 18:02:22,066 INFO L125 PetriNetUnfolderBase]: For 1092635/1092639 co-relation queries the response was YES. [2024-06-21 18:02:22,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 6267 events. 3967/6267 cut-off events. For 1092635/1092639 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38349 event pairs, 784 based on Foata normal form. 6/6270 useless extension candidates. Maximal degree in co-relation 60285. Up to 5497 conditions per place. [2024-06-21 18:02:22,176 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 455 selfloop transitions, 183 changer transitions 0/643 dead transitions. [2024-06-21 18:02:22,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 643 transitions, 11672 flow [2024-06-21 18:02:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 18:02:22,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 18:02:22,177 INFO L175 Difference]: Start difference. First operand has 384 places, 613 transitions, 9094 flow. Second operand 9 states and 152 transitions. [2024-06-21 18:02:22,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 643 transitions, 11672 flow [2024-06-21 18:02:26,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 643 transitions, 11438 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-21 18:02:26,397 INFO L231 Difference]: Finished difference. Result has 389 places, 628 transitions, 9795 flow [2024-06-21 18:02:26,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8860, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9795, PETRI_PLACES=389, PETRI_TRANSITIONS=628} [2024-06-21 18:02:26,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-21 18:02:26,397 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 628 transitions, 9795 flow [2024-06-21 18:02:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:26,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:26,398 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 18:02:26,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 18:02:26,398 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:26,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:26,398 INFO L85 PathProgramCache]: Analyzing trace with hash 962401577, now seen corresponding path program 12 times [2024-06-21 18:02:26,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:26,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903755942] [2024-06-21 18:02:26,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:26,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:26,968 INFO 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 18:02:26,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:26,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903755942] [2024-06-21 18:02:26,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903755942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:26,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:26,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:26,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147363502] [2024-06-21 18:02:26,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:26,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:26,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:27,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:27,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 628 transitions, 9795 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:27,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:27,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:27,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:28,541 INFO L124 PetriNetUnfolderBase]: 3961/6259 cut-off events. [2024-06-21 18:02:28,541 INFO L125 PetriNetUnfolderBase]: For 1098966/1098966 co-relation queries the response was YES. [2024-06-21 18:02:28,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60844 conditions, 6259 events. 3961/6259 cut-off events. For 1098966/1098966 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38379 event pairs, 763 based on Foata normal form. 2/6258 useless extension candidates. Maximal degree in co-relation 60663. Up to 5865 conditions per place. [2024-06-21 18:02:28,650 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 575 selfloop transitions, 58 changer transitions 0/638 dead transitions. [2024-06-21 18:02:28,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 638 transitions, 11093 flow [2024-06-21 18:02:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:02:28,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:02:28,651 INFO L175 Difference]: Start difference. First operand has 389 places, 628 transitions, 9795 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:02:28,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 638 transitions, 11093 flow [2024-06-21 18:02:32,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 638 transitions, 10707 flow, removed 157 selfloop flow, removed 3 redundant places. [2024-06-21 18:02:32,314 INFO L231 Difference]: Finished difference. Result has 394 places, 628 transitions, 9532 flow [2024-06-21 18:02:32,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9532, PETRI_PLACES=394, PETRI_TRANSITIONS=628} [2024-06-21 18:02:32,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-21 18:02:32,314 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 628 transitions, 9532 flow [2024-06-21 18:02:32,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:32,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:32,314 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 18:02:32,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 18:02:32,314 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:32,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2119169439, now seen corresponding path program 13 times [2024-06-21 18:02:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:32,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714906256] [2024-06-21 18:02:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:32,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:32,826 INFO 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 18:02:32,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:32,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714906256] [2024-06-21 18:02:32,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714906256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:32,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:32,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:02:32,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994272427] [2024-06-21 18:02:32,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:32,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:02:32,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:32,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:02:32,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:02:32,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:32,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 628 transitions, 9532 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:32,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:32,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:32,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:34,359 INFO L124 PetriNetUnfolderBase]: 3955/6249 cut-off events. [2024-06-21 18:02:34,359 INFO L125 PetriNetUnfolderBase]: For 1089773/1089777 co-relation queries the response was YES. [2024-06-21 18:02:34,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59668 conditions, 6249 events. 3955/6249 cut-off events. For 1089773/1089777 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38308 event pairs, 785 based on Foata normal form. 6/6252 useless extension candidates. Maximal degree in co-relation 59485. Up to 5487 conditions per place. [2024-06-21 18:02:34,464 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 455 selfloop transitions, 181 changer transitions 0/641 dead transitions. [2024-06-21 18:02:34,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 641 transitions, 11311 flow [2024-06-21 18:02:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 18:02:34,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 18:02:34,466 INFO L175 Difference]: Start difference. First operand has 394 places, 628 transitions, 9532 flow. Second operand 8 states and 138 transitions. [2024-06-21 18:02:34,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 641 transitions, 11311 flow [2024-06-21 18:02:37,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 641 transitions, 11020 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 18:02:37,711 INFO L231 Difference]: Finished difference. Result has 394 places, 628 transitions, 9610 flow [2024-06-21 18:02:37,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9241, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9610, PETRI_PLACES=394, PETRI_TRANSITIONS=628} [2024-06-21 18:02:37,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-21 18:02:37,711 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 628 transitions, 9610 flow [2024-06-21 18:02:37,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:37,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:37,712 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 18:02:37,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 18:02:37,712 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:37,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 936643391, now seen corresponding path program 2 times [2024-06-21 18:02:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:37,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262928461] [2024-06-21 18:02:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:38,369 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 18:02:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262928461] [2024-06-21 18:02:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262928461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:38,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:38,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319028439] [2024-06-21 18:02:38,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:38,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:38,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:38,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 628 transitions, 9610 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:38,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:38,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:38,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:40,037 INFO L124 PetriNetUnfolderBase]: 3952/6262 cut-off events. [2024-06-21 18:02:40,037 INFO L125 PetriNetUnfolderBase]: For 1092670/1092672 co-relation queries the response was YES. [2024-06-21 18:02:40,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59739 conditions, 6262 events. 3952/6262 cut-off events. For 1092670/1092672 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 38552 event pairs, 851 based on Foata normal form. 1/6263 useless extension candidates. Maximal degree in co-relation 59556. Up to 5780 conditions per place. [2024-06-21 18:02:40,140 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 81 changer transitions 0/652 dead transitions. [2024-06-21 18:02:40,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 652 transitions, 11013 flow [2024-06-21 18:02:40,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 18:02:40,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:02:40,141 INFO L175 Difference]: Start difference. First operand has 394 places, 628 transitions, 9610 flow. Second operand 8 states and 144 transitions. [2024-06-21 18:02:40,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 652 transitions, 11013 flow [2024-06-21 18:02:43,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 652 transitions, 10425 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 18:02:43,862 INFO L231 Difference]: Finished difference. Result has 393 places, 628 transitions, 9204 flow [2024-06-21 18:02:43,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9022, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9204, PETRI_PLACES=393, PETRI_TRANSITIONS=628} [2024-06-21 18:02:43,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-21 18:02:43,863 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 628 transitions, 9204 flow [2024-06-21 18:02:43,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:43,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:43,863 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 18:02:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 18:02:43,863 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:43,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash 144195489, now seen corresponding path program 3 times [2024-06-21 18:02:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:43,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236582787] [2024-06-21 18:02:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:02:44,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:44,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236582787] [2024-06-21 18:02:44,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236582787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:44,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:44,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:44,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427418427] [2024-06-21 18:02:44,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:44,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:44,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:44,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:44,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:44,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 628 transitions, 9204 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:44,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:44,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:44,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:46,245 INFO L124 PetriNetUnfolderBase]: 3957/6253 cut-off events. [2024-06-21 18:02:46,245 INFO L125 PetriNetUnfolderBase]: For 1108389/1108389 co-relation queries the response was YES. [2024-06-21 18:02:46,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59253 conditions, 6253 events. 3957/6253 cut-off events. For 1108389/1108389 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38281 event pairs, 771 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 59072. Up to 5796 conditions per place. [2024-06-21 18:02:46,342 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 76 changer transitions 0/651 dead transitions. [2024-06-21 18:02:46,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 651 transitions, 10650 flow [2024-06-21 18:02:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:02:46,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:02:46,343 INFO L175 Difference]: Start difference. First operand has 393 places, 628 transitions, 9204 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:02:46,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 651 transitions, 10650 flow [2024-06-21 18:02:49,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 651 transitions, 10464 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:02:49,881 INFO L231 Difference]: Finished difference. Result has 393 places, 631 transitions, 9260 flow [2024-06-21 18:02:49,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9018, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9260, PETRI_PLACES=393, PETRI_TRANSITIONS=631} [2024-06-21 18:02:49,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-21 18:02:49,882 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 631 transitions, 9260 flow [2024-06-21 18:02:49,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:49,882 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 18:02:49,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 18:02:49,882 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:49,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1770358135, now seen corresponding path program 4 times [2024-06-21 18:02:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:49,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27762395] [2024-06-21 18:02:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:50,636 INFO 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 18:02:50,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:50,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27762395] [2024-06-21 18:02:50,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27762395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:50,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:50,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:50,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498747893] [2024-06-21 18:02:50,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:50,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:50,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:50,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:50,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 631 transitions, 9260 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:50,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:50,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:50,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:52,231 INFO L124 PetriNetUnfolderBase]: 3951/6245 cut-off events. [2024-06-21 18:02:52,231 INFO L125 PetriNetUnfolderBase]: For 1083679/1083679 co-relation queries the response was YES. [2024-06-21 18:02:52,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58774 conditions, 6245 events. 3951/6245 cut-off events. For 1083679/1083679 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38283 event pairs, 763 based on Foata normal form. 2/6246 useless extension candidates. Maximal degree in co-relation 58593. Up to 5674 conditions per place. [2024-06-21 18:02:52,324 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 107 changer transitions 0/651 dead transitions. [2024-06-21 18:02:52,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 651 transitions, 10881 flow [2024-06-21 18:02:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:02:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:02:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 18:02:52,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 18:02:52,326 INFO L175 Difference]: Start difference. First operand has 393 places, 631 transitions, 9260 flow. Second operand 9 states and 151 transitions. [2024-06-21 18:02:52,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 651 transitions, 10881 flow [2024-06-21 18:02:55,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 651 transitions, 10708 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 18:02:55,724 INFO L231 Difference]: Finished difference. Result has 395 places, 632 transitions, 9338 flow [2024-06-21 18:02:55,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9091, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9338, PETRI_PLACES=395, PETRI_TRANSITIONS=632} [2024-06-21 18:02:55,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-21 18:02:55,725 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 632 transitions, 9338 flow [2024-06-21 18:02:55,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:55,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:02:55,725 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 18:02:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 18:02:55,725 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:02:55,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:02:55,726 INFO L85 PathProgramCache]: Analyzing trace with hash 397662399, now seen corresponding path program 5 times [2024-06-21 18:02:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:02:55,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024004637] [2024-06-21 18:02:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:02:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:02:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:02:56,406 INFO 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 18:02:56,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:02:56,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024004637] [2024-06-21 18:02:56,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024004637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:02:56,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:02:56,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:02:56,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946749436] [2024-06-21 18:02:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:02:56,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:02:56,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:02:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:02:56,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:02:56,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:02:56,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 632 transitions, 9338 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:02:56,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:02:56,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:02:56,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:02:58,084 INFO L124 PetriNetUnfolderBase]: 3934/6216 cut-off events. [2024-06-21 18:02:58,084 INFO L125 PetriNetUnfolderBase]: For 1070490/1070490 co-relation queries the response was YES. [2024-06-21 18:02:58,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58539 conditions, 6216 events. 3934/6216 cut-off events. For 1070490/1070490 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38050 event pairs, 767 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 58358. Up to 5760 conditions per place. [2024-06-21 18:02:58,174 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 575 selfloop transitions, 73 changer transitions 0/653 dead transitions. [2024-06-21 18:02:58,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 653 transitions, 10725 flow [2024-06-21 18:02:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:02:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:02:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 18:02:58,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 18:02:58,175 INFO L175 Difference]: Start difference. First operand has 395 places, 632 transitions, 9338 flow. Second operand 8 states and 141 transitions. [2024-06-21 18:02:58,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 653 transitions, 10725 flow [2024-06-21 18:03:01,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 653 transitions, 10534 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 18:03:01,541 INFO L231 Difference]: Finished difference. Result has 398 places, 632 transitions, 9305 flow [2024-06-21 18:03:01,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9147, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9305, PETRI_PLACES=398, PETRI_TRANSITIONS=632} [2024-06-21 18:03:01,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 18:03:01,541 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 632 transitions, 9305 flow [2024-06-21 18:03:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:01,542 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 18:03:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 18:03:01,542 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:01,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:01,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1917705847, now seen corresponding path program 1 times [2024-06-21 18:03:01,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:01,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927935906] [2024-06-21 18:03:01,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:01,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:02,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927935906] [2024-06-21 18:03:02,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927935906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:02,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:02,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334694202] [2024-06-21 18:03:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:02,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:02,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:02,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 632 transitions, 9305 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:02,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:02,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:02,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:03,724 INFO L124 PetriNetUnfolderBase]: 3949/6247 cut-off events. [2024-06-21 18:03:03,724 INFO L125 PetriNetUnfolderBase]: For 1084472/1084472 co-relation queries the response was YES. [2024-06-21 18:03:03,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58625 conditions, 6247 events. 3949/6247 cut-off events. For 1084472/1084472 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 38341 event pairs, 746 based on Foata normal form. 3/6249 useless extension candidates. Maximal degree in co-relation 58443. Up to 5510 conditions per place. [2024-06-21 18:03:03,811 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 133 changer transitions 0/652 dead transitions. [2024-06-21 18:03:03,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 652 transitions, 10741 flow [2024-06-21 18:03:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:03:03,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:03:03,812 INFO L175 Difference]: Start difference. First operand has 398 places, 632 transitions, 9305 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:03:03,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 652 transitions, 10741 flow [2024-06-21 18:03:06,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 652 transitions, 10465 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 18:03:06,770 INFO L231 Difference]: Finished difference. Result has 396 places, 636 transitions, 9396 flow [2024-06-21 18:03:06,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9029, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9396, PETRI_PLACES=396, PETRI_TRANSITIONS=636} [2024-06-21 18:03:06,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-21 18:03:06,771 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 636 transitions, 9396 flow [2024-06-21 18:03:06,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:06,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:06,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:03:06,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 18:03:06,771 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:06,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2085754357, now seen corresponding path program 2 times [2024-06-21 18:03:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:06,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857756389] [2024-06-21 18:03:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:06,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:07,341 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 18:03:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857756389] [2024-06-21 18:03:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857756389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:07,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:07,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81501898] [2024-06-21 18:03:07,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:07,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:07,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:07,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:07,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:07,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:07,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 636 transitions, 9396 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:07,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:07,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:07,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:09,007 INFO L124 PetriNetUnfolderBase]: 3942/6241 cut-off events. [2024-06-21 18:03:09,007 INFO L125 PetriNetUnfolderBase]: For 1063316/1063316 co-relation queries the response was YES. [2024-06-21 18:03:09,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58586 conditions, 6241 events. 3942/6241 cut-off events. For 1063316/1063316 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 38319 event pairs, 756 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 58404. Up to 5855 conditions per place. [2024-06-21 18:03:09,096 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 591 selfloop transitions, 58 changer transitions 0/654 dead transitions. [2024-06-21 18:03:09,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 654 transitions, 10830 flow [2024-06-21 18:03:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 18:03:09,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 18:03:09,097 INFO L175 Difference]: Start difference. First operand has 396 places, 636 transitions, 9396 flow. Second operand 9 states and 146 transitions. [2024-06-21 18:03:09,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 654 transitions, 10830 flow [2024-06-21 18:03:11,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 654 transitions, 10456 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:11,858 INFO L231 Difference]: Finished difference. Result has 399 places, 640 transitions, 9242 flow [2024-06-21 18:03:11,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9242, PETRI_PLACES=399, PETRI_TRANSITIONS=640} [2024-06-21 18:03:11,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-21 18:03:11,859 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 640 transitions, 9242 flow [2024-06-21 18:03:11,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:11,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:11,859 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 18:03:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 18:03:11,859 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:11,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1903995215, now seen corresponding path program 3 times [2024-06-21 18:03:11,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:11,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704605452] [2024-06-21 18:03:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:12,558 INFO 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 18:03:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704605452] [2024-06-21 18:03:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704605452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:12,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545692710] [2024-06-21 18:03:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:12,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:12,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:12,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 640 transitions, 9242 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:12,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:12,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:14,065 INFO L124 PetriNetUnfolderBase]: 3947/6243 cut-off events. [2024-06-21 18:03:14,066 INFO L125 PetriNetUnfolderBase]: For 1080383/1080387 co-relation queries the response was YES. [2024-06-21 18:03:14,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58474 conditions, 6243 events. 3947/6243 cut-off events. For 1080383/1080387 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38286 event pairs, 765 based on Foata normal form. 5/6247 useless extension candidates. Maximal degree in co-relation 58291. Up to 5795 conditions per place. [2024-06-21 18:03:14,169 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 566 selfloop transitions, 82 changer transitions 0/653 dead transitions. [2024-06-21 18:03:14,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 653 transitions, 10638 flow [2024-06-21 18:03:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:14,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:03:14,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:03:14,170 INFO L175 Difference]: Start difference. First operand has 399 places, 640 transitions, 9242 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:03:14,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 653 transitions, 10638 flow [2024-06-21 18:03:17,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 653 transitions, 10422 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 18:03:17,730 INFO L231 Difference]: Finished difference. Result has 400 places, 643 transitions, 9270 flow [2024-06-21 18:03:17,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9026, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9270, PETRI_PLACES=400, PETRI_TRANSITIONS=643} [2024-06-21 18:03:17,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-21 18:03:17,731 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 643 transitions, 9270 flow [2024-06-21 18:03:17,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:17,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:17,732 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 18:03:17,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 18:03:17,732 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:17,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 403390371, now seen corresponding path program 4 times [2024-06-21 18:03:17,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:17,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469099220] [2024-06-21 18:03:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:17,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:18,353 INFO 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 18:03:18,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469099220] [2024-06-21 18:03:18,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469099220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:18,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:18,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:18,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22590591] [2024-06-21 18:03:18,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:18,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:18,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:18,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:18,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:18,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 643 transitions, 9270 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:18,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:18,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:18,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:19,895 INFO L124 PetriNetUnfolderBase]: 3960/6271 cut-off events. [2024-06-21 18:03:19,895 INFO L125 PetriNetUnfolderBase]: For 1104717/1104721 co-relation queries the response was YES. [2024-06-21 18:03:19,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58939 conditions, 6271 events. 3960/6271 cut-off events. For 1104717/1104721 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38584 event pairs, 767 based on Foata normal form. 5/6275 useless extension candidates. Maximal degree in co-relation 58755. Up to 5800 conditions per place. [2024-06-21 18:03:19,997 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 563 selfloop transitions, 94 changer transitions 0/662 dead transitions. [2024-06-21 18:03:19,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 662 transitions, 11019 flow [2024-06-21 18:03:19,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 18:03:19,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 18:03:19,999 INFO L175 Difference]: Start difference. First operand has 400 places, 643 transitions, 9270 flow. Second operand 9 states and 147 transitions. [2024-06-21 18:03:19,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 662 transitions, 11019 flow [2024-06-21 18:03:23,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 662 transitions, 10817 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:23,861 INFO L231 Difference]: Finished difference. Result has 404 places, 650 transitions, 9453 flow [2024-06-21 18:03:23,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9068, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9453, PETRI_PLACES=404, PETRI_TRANSITIONS=650} [2024-06-21 18:03:23,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-21 18:03:23,863 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 650 transitions, 9453 flow [2024-06-21 18:03:23,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:23,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:23,863 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 18:03:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 18:03:23,863 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:23,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 858302463, now seen corresponding path program 5 times [2024-06-21 18:03:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:23,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383076849] [2024-06-21 18:03:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:23,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:03:24,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:24,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383076849] [2024-06-21 18:03:24,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383076849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:24,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:24,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:24,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845338050] [2024-06-21 18:03:24,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:24,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:24,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:24,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:24,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 650 transitions, 9453 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:24,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:24,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:24,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:26,043 INFO L124 PetriNetUnfolderBase]: 3953/6257 cut-off events. [2024-06-21 18:03:26,043 INFO L125 PetriNetUnfolderBase]: For 1114798/1114802 co-relation queries the response was YES. [2024-06-21 18:03:26,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58948 conditions, 6257 events. 3953/6257 cut-off events. For 1114798/1114802 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38457 event pairs, 767 based on Foata normal form. 5/6261 useless extension candidates. Maximal degree in co-relation 58762. Up to 5743 conditions per place. [2024-06-21 18:03:26,156 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 125 changer transitions 0/667 dead transitions. [2024-06-21 18:03:26,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 667 transitions, 11149 flow [2024-06-21 18:03:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:03:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:03:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-21 18:03:26,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-21 18:03:26,157 INFO L175 Difference]: Start difference. First operand has 404 places, 650 transitions, 9453 flow. Second operand 10 states and 162 transitions. [2024-06-21 18:03:26,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 667 transitions, 11149 flow [2024-06-21 18:03:29,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 667 transitions, 10915 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:29,410 INFO L231 Difference]: Finished difference. Result has 409 places, 654 transitions, 9613 flow [2024-06-21 18:03:29,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9225, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9613, PETRI_PLACES=409, PETRI_TRANSITIONS=654} [2024-06-21 18:03:29,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 18:03:29,411 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 654 transitions, 9613 flow [2024-06-21 18:03:29,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:29,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:29,411 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 18:03:29,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 18:03:29,411 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:29,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1409426453, now seen corresponding path program 6 times [2024-06-21 18:03:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:29,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874112965] [2024-06-21 18:03:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:29,979 INFO 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 18:03:29,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:29,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874112965] [2024-06-21 18:03:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874112965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:29,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:29,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758616247] [2024-06-21 18:03:29,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:29,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:30,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:30,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 654 transitions, 9613 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:30,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:30,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:30,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:31,486 INFO L124 PetriNetUnfolderBase]: 3958/6274 cut-off events. [2024-06-21 18:03:31,486 INFO L125 PetriNetUnfolderBase]: For 1115487/1115489 co-relation queries the response was YES. [2024-06-21 18:03:31,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59158 conditions, 6274 events. 3958/6274 cut-off events. For 1115487/1115489 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38696 event pairs, 783 based on Foata normal form. 1/6274 useless extension candidates. Maximal degree in co-relation 58970. Up to 5148 conditions per place. [2024-06-21 18:03:31,590 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 448 selfloop transitions, 217 changer transitions 0/670 dead transitions. [2024-06-21 18:03:31,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 670 transitions, 11310 flow [2024-06-21 18:03:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:03:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:03:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 18:03:31,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 18:03:31,591 INFO L175 Difference]: Start difference. First operand has 409 places, 654 transitions, 9613 flow. Second operand 8 states and 139 transitions. [2024-06-21 18:03:31,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 670 transitions, 11310 flow [2024-06-21 18:03:35,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 670 transitions, 10934 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-21 18:03:35,060 INFO L231 Difference]: Finished difference. Result has 409 places, 657 transitions, 9764 flow [2024-06-21 18:03:35,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9250, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9764, PETRI_PLACES=409, PETRI_TRANSITIONS=657} [2024-06-21 18:03:35,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 18:03:35,060 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 657 transitions, 9764 flow [2024-06-21 18:03:35,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:35,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:35,061 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 18:03:35,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 18:03:35,061 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:35,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:35,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1159452651, now seen corresponding path program 7 times [2024-06-21 18:03:35,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:35,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761859756] [2024-06-21 18:03:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:35,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:35,649 INFO 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 18:03:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:35,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761859756] [2024-06-21 18:03:35,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761859756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:35,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:03:35,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154349491] [2024-06-21 18:03:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:35,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:03:35,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:35,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:03:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:03:35,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:35,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 657 transitions, 9764 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:35,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:35,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:35,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:37,202 INFO L124 PetriNetUnfolderBase]: 3948/6247 cut-off events. [2024-06-21 18:03:37,202 INFO L125 PetriNetUnfolderBase]: For 1107943/1107947 co-relation queries the response was YES. [2024-06-21 18:03:37,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59037 conditions, 6247 events. 3948/6247 cut-off events. For 1107943/1107947 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38369 event pairs, 777 based on Foata normal form. 6/6252 useless extension candidates. Maximal degree in co-relation 58848. Up to 5776 conditions per place. [2024-06-21 18:03:37,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 569 selfloop transitions, 94 changer transitions 0/668 dead transitions. [2024-06-21 18:03:37,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 668 transitions, 11124 flow [2024-06-21 18:03:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:37,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:37,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 18:03:37,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 18:03:37,310 INFO L175 Difference]: Start difference. First operand has 409 places, 657 transitions, 9764 flow. Second operand 9 states and 146 transitions. [2024-06-21 18:03:37,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 668 transitions, 11124 flow [2024-06-21 18:03:41,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 668 transitions, 10641 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-21 18:03:41,395 INFO L231 Difference]: Finished difference. Result has 413 places, 657 transitions, 9480 flow [2024-06-21 18:03:41,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9281, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9480, PETRI_PLACES=413, PETRI_TRANSITIONS=657} [2024-06-21 18:03:41,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-21 18:03:41,403 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 657 transitions, 9480 flow [2024-06-21 18:03:41,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:41,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:41,404 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 18:03:41,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 18:03:41,404 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:41,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1027188494, now seen corresponding path program 1 times [2024-06-21 18:03:41,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:41,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230114113] [2024-06-21 18:03:41,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:42,217 INFO 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 18:03:42,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:42,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230114113] [2024-06-21 18:03:42,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230114113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:42,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:42,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:03:42,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919372023] [2024-06-21 18:03:42,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:03:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:42,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:03:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:03:42,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:42,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 657 transitions, 9480 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:42,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:42,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:42,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:43,856 INFO L124 PetriNetUnfolderBase]: 3993/6324 cut-off events. [2024-06-21 18:03:43,856 INFO L125 PetriNetUnfolderBase]: For 1165083/1165083 co-relation queries the response was YES. [2024-06-21 18:03:43,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59848 conditions, 6324 events. 3993/6324 cut-off events. For 1165083/1165083 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 38940 event pairs, 666 based on Foata normal form. 4/6327 useless extension candidates. Maximal degree in co-relation 59659. Up to 5685 conditions per place. [2024-06-21 18:03:43,959 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 595 selfloop transitions, 87 changer transitions 0/687 dead transitions. [2024-06-21 18:03:43,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 687 transitions, 11364 flow [2024-06-21 18:03:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:03:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:03:43,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 18:03:43,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 18:03:43,960 INFO L175 Difference]: Start difference. First operand has 413 places, 657 transitions, 9480 flow. Second operand 10 states and 166 transitions. [2024-06-21 18:03:43,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 687 transitions, 11364 flow [2024-06-21 18:03:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 687 transitions, 11112 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 18:03:47,402 INFO L231 Difference]: Finished difference. Result has 416 places, 663 transitions, 9615 flow [2024-06-21 18:03:47,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9228, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9615, PETRI_PLACES=416, PETRI_TRANSITIONS=663} [2024-06-21 18:03:47,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-21 18:03:47,403 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 663 transitions, 9615 flow [2024-06-21 18:03:47,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:47,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:47,403 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 18:03:47,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 18:03:47,403 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:47,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:47,404 INFO L85 PathProgramCache]: Analyzing trace with hash 56734652, now seen corresponding path program 2 times [2024-06-21 18:03:47,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:47,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275742105] [2024-06-21 18:03:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:47,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:48,234 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 18:03:48,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275742105] [2024-06-21 18:03:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275742105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:48,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:03:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926244085] [2024-06-21 18:03:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:48,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:03:48,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:03:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:03:48,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:48,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 663 transitions, 9615 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:48,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:48,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:48,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:50,068 INFO L124 PetriNetUnfolderBase]: 4051/6410 cut-off events. [2024-06-21 18:03:50,068 INFO L125 PetriNetUnfolderBase]: For 1231517/1231517 co-relation queries the response was YES. [2024-06-21 18:03:50,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62009 conditions, 6410 events. 4051/6410 cut-off events. For 1231517/1231517 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 39531 event pairs, 760 based on Foata normal form. 4/6413 useless extension candidates. Maximal degree in co-relation 61818. Up to 5726 conditions per place. [2024-06-21 18:03:50,159 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 580 selfloop transitions, 106 changer transitions 0/691 dead transitions. [2024-06-21 18:03:50,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 691 transitions, 11571 flow [2024-06-21 18:03:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:03:50,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 18:03:50,160 INFO L175 Difference]: Start difference. First operand has 416 places, 663 transitions, 9615 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:03:50,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 691 transitions, 11571 flow [2024-06-21 18:03:54,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 691 transitions, 11292 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 18:03:54,343 INFO L231 Difference]: Finished difference. Result has 420 places, 669 transitions, 9782 flow [2024-06-21 18:03:54,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9340, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9782, PETRI_PLACES=420, PETRI_TRANSITIONS=669} [2024-06-21 18:03:54,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-21 18:03:54,343 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 669 transitions, 9782 flow [2024-06-21 18:03:54,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:54,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:03:54,343 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 18:03:54,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 18:03:54,343 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:03:54,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:03:54,344 INFO L85 PathProgramCache]: Analyzing trace with hash -719613914, now seen corresponding path program 3 times [2024-06-21 18:03:54,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:03:54,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945062914] [2024-06-21 18:03:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:03:54,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:03:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:03:55,245 INFO 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 18:03:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:03:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945062914] [2024-06-21 18:03:55,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945062914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:03:55,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:03:55,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:03:55,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272560937] [2024-06-21 18:03:55,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:03:55,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:03:55,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:03:55,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:03:55,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:03:55,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:03:55,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 669 transitions, 9782 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:03:55,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:03:55,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:03:55,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:03:57,066 INFO L124 PetriNetUnfolderBase]: 4054/6414 cut-off events. [2024-06-21 18:03:57,066 INFO L125 PetriNetUnfolderBase]: For 1240624/1240624 co-relation queries the response was YES. [2024-06-21 18:03:57,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61849 conditions, 6414 events. 4054/6414 cut-off events. For 1240624/1240624 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 39551 event pairs, 772 based on Foata normal form. 4/6417 useless extension candidates. Maximal degree in co-relation 61656. Up to 5809 conditions per place. [2024-06-21 18:03:57,168 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 116 changer transitions 0/692 dead transitions. [2024-06-21 18:03:57,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 692 transitions, 11344 flow [2024-06-21 18:03:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:03:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:03:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 18:03:57,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:03:57,169 INFO L175 Difference]: Start difference. First operand has 420 places, 669 transitions, 9782 flow. Second operand 9 states and 153 transitions. [2024-06-21 18:03:57,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 692 transitions, 11344 flow [2024-06-21 18:04:01,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 692 transitions, 11084 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:01,753 INFO L231 Difference]: Finished difference. Result has 424 places, 672 transitions, 9879 flow [2024-06-21 18:04:01,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9536, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9879, PETRI_PLACES=424, PETRI_TRANSITIONS=672} [2024-06-21 18:04:01,754 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-21 18:04:01,754 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 672 transitions, 9879 flow [2024-06-21 18:04:01,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:01,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:01,754 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 18:04:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 18:04:01,755 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:01,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash -577510844, now seen corresponding path program 4 times [2024-06-21 18:04:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:01,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071810231] [2024-06-21 18:04:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:02,537 INFO 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 18:04:02,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:02,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071810231] [2024-06-21 18:04:02,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071810231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:02,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:02,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:04:02,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606924991] [2024-06-21 18:04:02,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:04:02,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:04:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:04:02,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:02,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 672 transitions, 9879 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:02,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:02,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:02,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:04,306 INFO L124 PetriNetUnfolderBase]: 4070/6441 cut-off events. [2024-06-21 18:04:04,306 INFO L125 PetriNetUnfolderBase]: For 1259440/1259440 co-relation queries the response was YES. [2024-06-21 18:04:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62290 conditions, 6441 events. 4070/6441 cut-off events. For 1259440/1259440 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39757 event pairs, 764 based on Foata normal form. 4/6444 useless extension candidates. Maximal degree in co-relation 62095. Up to 5699 conditions per place. [2024-06-21 18:04:04,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 556 selfloop transitions, 132 changer transitions 0/693 dead transitions. [2024-06-21 18:04:04,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 693 transitions, 11431 flow [2024-06-21 18:04:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:04:04,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 18:04:04,409 INFO L175 Difference]: Start difference. First operand has 424 places, 672 transitions, 9879 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:04:04,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 693 transitions, 11431 flow [2024-06-21 18:04:09,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 693 transitions, 11118 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-21 18:04:09,463 INFO L231 Difference]: Finished difference. Result has 426 places, 675 transitions, 9954 flow [2024-06-21 18:04:09,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9566, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9954, PETRI_PLACES=426, PETRI_TRANSITIONS=675} [2024-06-21 18:04:09,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-21 18:04:09,464 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 675 transitions, 9954 flow [2024-06-21 18:04:09,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:09,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:09,464 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 18:04:09,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 18:04:09,464 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:09,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2080045490, now seen corresponding path program 5 times [2024-06-21 18:04:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458277642] [2024-06-21 18:04:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:10,239 INFO 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 18:04:10,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:10,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458277642] [2024-06-21 18:04:10,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458277642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:10,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:10,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:04:10,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791325700] [2024-06-21 18:04:10,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:10,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:04:10,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:10,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:04:10,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:04:10,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:10,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 675 transitions, 9954 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:10,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:10,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:10,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:12,005 INFO L124 PetriNetUnfolderBase]: 4128/6519 cut-off events. [2024-06-21 18:04:12,005 INFO L125 PetriNetUnfolderBase]: For 1332561/1332561 co-relation queries the response was YES. [2024-06-21 18:04:12,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64365 conditions, 6519 events. 4128/6519 cut-off events. For 1332561/1332561 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 40189 event pairs, 789 based on Foata normal form. 4/6522 useless extension candidates. Maximal degree in co-relation 64169. Up to 5705 conditions per place. [2024-06-21 18:04:12,114 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 564 selfloop transitions, 132 changer transitions 0/701 dead transitions. [2024-06-21 18:04:12,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 701 transitions, 11950 flow [2024-06-21 18:04:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:04:12,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:04:12,115 INFO L175 Difference]: Start difference. First operand has 426 places, 675 transitions, 9954 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:04:12,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 701 transitions, 11950 flow [2024-06-21 18:04:17,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 701 transitions, 11600 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:17,012 INFO L231 Difference]: Finished difference. Result has 430 places, 681 transitions, 10117 flow [2024-06-21 18:04:17,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9604, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10117, PETRI_PLACES=430, PETRI_TRANSITIONS=681} [2024-06-21 18:04:17,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-21 18:04:17,013 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 681 transitions, 10117 flow [2024-06-21 18:04:17,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:17,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:17,013 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 18:04:17,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 18:04:17,014 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:17,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2085555740, now seen corresponding path program 6 times [2024-06-21 18:04:17,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:17,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193653109] [2024-06-21 18:04:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:17,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:17,746 INFO 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 18:04:17,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193653109] [2024-06-21 18:04:17,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193653109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:17,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:17,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:04:17,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181531020] [2024-06-21 18:04:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:17,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:04:17,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:17,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:04:17,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:04:17,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:17,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 681 transitions, 10117 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:17,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:17,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:17,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:19,478 INFO L124 PetriNetUnfolderBase]: 4203/6637 cut-off events. [2024-06-21 18:04:19,479 INFO L125 PetriNetUnfolderBase]: For 1513610/1513610 co-relation queries the response was YES. [2024-06-21 18:04:19,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65647 conditions, 6637 events. 4203/6637 cut-off events. For 1513610/1513610 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 41051 event pairs, 779 based on Foata normal form. 24/6660 useless extension candidates. Maximal degree in co-relation 65449. Up to 5713 conditions per place. [2024-06-21 18:04:19,590 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 168 changer transitions 0/708 dead transitions. [2024-06-21 18:04:19,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 708 transitions, 12031 flow [2024-06-21 18:04:19,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:19,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:19,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 18:04:19,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:04:19,591 INFO L175 Difference]: Start difference. First operand has 430 places, 681 transitions, 10117 flow. Second operand 9 states and 162 transitions. [2024-06-21 18:04:19,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 708 transitions, 12031 flow [2024-06-21 18:04:24,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 708 transitions, 11715 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:24,592 INFO L231 Difference]: Finished difference. Result has 434 places, 685 transitions, 10310 flow [2024-06-21 18:04:24,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9819, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10310, PETRI_PLACES=434, PETRI_TRANSITIONS=685} [2024-06-21 18:04:24,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-21 18:04:24,593 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 685 transitions, 10310 flow [2024-06-21 18:04:24,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:24,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:24,593 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 18:04:24,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 18:04:24,593 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:24,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2085770942, now seen corresponding path program 1 times [2024-06-21 18:04:24,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:24,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222821103] [2024-06-21 18:04:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:24,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:24,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:25,169 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 18:04:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222821103] [2024-06-21 18:04:25,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222821103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:25,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:25,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:25,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303046023] [2024-06-21 18:04:25,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:25,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:25,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:25,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:25,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:25,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:25,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 685 transitions, 10310 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:25,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:25,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:25,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:26,934 INFO L124 PetriNetUnfolderBase]: 4325/6827 cut-off events. [2024-06-21 18:04:26,934 INFO L125 PetriNetUnfolderBase]: For 1586100/1586100 co-relation queries the response was YES. [2024-06-21 18:04:27,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69794 conditions, 6827 events. 4325/6827 cut-off events. For 1586100/1586100 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 42301 event pairs, 805 based on Foata normal form. 16/6842 useless extension candidates. Maximal degree in co-relation 69594. Up to 5625 conditions per place. [2024-06-21 18:04:27,047 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 536 selfloop transitions, 175 changer transitions 0/716 dead transitions. [2024-06-21 18:04:27,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 716 transitions, 12576 flow [2024-06-21 18:04:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 18:04:27,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 18:04:27,048 INFO L175 Difference]: Start difference. First operand has 434 places, 685 transitions, 10310 flow. Second operand 9 states and 164 transitions. [2024-06-21 18:04:27,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 716 transitions, 12576 flow [2024-06-21 18:04:31,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 716 transitions, 12147 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 18:04:31,955 INFO L231 Difference]: Finished difference. Result has 436 places, 689 transitions, 10452 flow [2024-06-21 18:04:31,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9881, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10452, PETRI_PLACES=436, PETRI_TRANSITIONS=689} [2024-06-21 18:04:31,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-21 18:04:31,955 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 689 transitions, 10452 flow [2024-06-21 18:04:31,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:31,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:31,956 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 18:04:31,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 18:04:31,956 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:31,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1159254034, now seen corresponding path program 7 times [2024-06-21 18:04:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:31,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235863838] [2024-06-21 18:04:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235863838] [2024-06-21 18:04:32,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235863838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:32,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:32,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:04:32,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430143430] [2024-06-21 18:04:32,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:32,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:04:32,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:32,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:04:32,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:04:32,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:32,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 689 transitions, 10452 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:32,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:32,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:34,564 INFO L124 PetriNetUnfolderBase]: 4413/6964 cut-off events. [2024-06-21 18:04:34,564 INFO L125 PetriNetUnfolderBase]: For 1683355/1683357 co-relation queries the response was YES. [2024-06-21 18:04:34,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71001 conditions, 6964 events. 4413/6964 cut-off events. For 1683355/1683357 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43318 event pairs, 862 based on Foata normal form. 24/6987 useless extension candidates. Maximal degree in co-relation 70800. Up to 5663 conditions per place. [2024-06-21 18:04:34,684 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 274 changer transitions 0/713 dead transitions. [2024-06-21 18:04:34,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 713 transitions, 12344 flow [2024-06-21 18:04:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 18:04:34,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 18:04:34,686 INFO L175 Difference]: Start difference. First operand has 436 places, 689 transitions, 10452 flow. Second operand 9 states and 165 transitions. [2024-06-21 18:04:34,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 713 transitions, 12344 flow [2024-06-21 18:04:39,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 713 transitions, 12024 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 18:04:39,661 INFO L231 Difference]: Finished difference. Result has 440 places, 692 transitions, 10826 flow [2024-06-21 18:04:39,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10132, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10826, PETRI_PLACES=440, PETRI_TRANSITIONS=692} [2024-06-21 18:04:39,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-21 18:04:39,662 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 692 transitions, 10826 flow [2024-06-21 18:04:39,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:39,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:39,662 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 18:04:39,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 18:04:39,662 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:39,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1175411086, now seen corresponding path program 2 times [2024-06-21 18:04:39,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:39,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619647620] [2024-06-21 18:04:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:39,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:40,267 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 18:04:40,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:40,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619647620] [2024-06-21 18:04:40,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619647620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:40,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:40,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:40,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992287229] [2024-06-21 18:04:40,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:40,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:40,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:40,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 692 transitions, 10826 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:40,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:40,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:40,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:42,094 INFO L124 PetriNetUnfolderBase]: 4535/7159 cut-off events. [2024-06-21 18:04:42,095 INFO L125 PetriNetUnfolderBase]: For 1750524/1750526 co-relation queries the response was YES. [2024-06-21 18:04:42,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75335 conditions, 7159 events. 4535/7159 cut-off events. For 1750524/1750526 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 44691 event pairs, 878 based on Foata normal form. 16/7174 useless extension candidates. Maximal degree in co-relation 75132. Up to 5599 conditions per place. [2024-06-21 18:04:42,216 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 437 selfloop transitions, 279 changer transitions 0/721 dead transitions. [2024-06-21 18:04:42,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 721 transitions, 13114 flow [2024-06-21 18:04:42,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 18:04:42,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 18:04:42,217 INFO L175 Difference]: Start difference. First operand has 440 places, 692 transitions, 10826 flow. Second operand 9 states and 167 transitions. [2024-06-21 18:04:42,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 721 transitions, 13114 flow [2024-06-21 18:04:47,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 721 transitions, 12466 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 18:04:47,682 INFO L231 Difference]: Finished difference. Result has 442 places, 696 transitions, 10974 flow [2024-06-21 18:04:47,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10178, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10974, PETRI_PLACES=442, PETRI_TRANSITIONS=696} [2024-06-21 18:04:47,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-21 18:04:47,683 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 696 transitions, 10974 flow [2024-06-21 18:04:47,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:47,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:47,683 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 18:04:47,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 18:04:47,684 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:47,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:47,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1425166516, now seen corresponding path program 3 times [2024-06-21 18:04:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:47,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325690230] [2024-06-21 18:04:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:48,284 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 18:04:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:48,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325690230] [2024-06-21 18:04:48,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325690230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:48,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:48,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:04:48,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015179522] [2024-06-21 18:04:48,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:48,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:04:48,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:04:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:04:48,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:48,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 696 transitions, 10974 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:48,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:48,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:48,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:50,320 INFO L124 PetriNetUnfolderBase]: 4709/7423 cut-off events. [2024-06-21 18:04:50,320 INFO L125 PetriNetUnfolderBase]: For 1952433/1952435 co-relation queries the response was YES. [2024-06-21 18:04:50,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80577 conditions, 7423 events. 4709/7423 cut-off events. For 1952433/1952435 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46398 event pairs, 916 based on Foata normal form. 16/7438 useless extension candidates. Maximal degree in co-relation 80373. Up to 5085 conditions per place. [2024-06-21 18:04:50,454 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 420 selfloop transitions, 301 changer transitions 0/726 dead transitions. [2024-06-21 18:04:50,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 726 transitions, 13306 flow [2024-06-21 18:04:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:50,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 18:04:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 18:04:50,460 INFO L175 Difference]: Start difference. First operand has 442 places, 696 transitions, 10974 flow. Second operand 9 states and 165 transitions. [2024-06-21 18:04:50,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 726 transitions, 13306 flow [2024-06-21 18:04:55,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 726 transitions, 12656 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 18:04:55,778 INFO L231 Difference]: Finished difference. Result has 445 places, 700 transitions, 11171 flow [2024-06-21 18:04:55,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10328, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11171, PETRI_PLACES=445, PETRI_TRANSITIONS=700} [2024-06-21 18:04:55,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-21 18:04:55,778 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 700 transitions, 11171 flow [2024-06-21 18:04:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:55,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:04:55,779 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 18:04:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 18:04:55,779 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:04:55,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:04:55,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1610714320, now seen corresponding path program 8 times [2024-06-21 18:04:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:04:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115274795] [2024-06-21 18:04:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:04:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:04:55,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:04:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:04:56,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:04:56,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115274795] [2024-06-21 18:04:56,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115274795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:04:56,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:04:56,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:04:56,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792386823] [2024-06-21 18:04:56,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:04:56,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:04:56,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:04:56,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:04:56,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:04:56,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:04:56,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 700 transitions, 11171 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:04:56,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:04:56,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:04:56,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:04:58,642 INFO L124 PetriNetUnfolderBase]: 4797/7563 cut-off events. [2024-06-21 18:04:58,642 INFO L125 PetriNetUnfolderBase]: For 2061773/2061775 co-relation queries the response was YES. [2024-06-21 18:04:58,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82331 conditions, 7563 events. 4797/7563 cut-off events. For 2061773/2061775 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 47573 event pairs, 966 based on Foata normal form. 24/7586 useless extension candidates. Maximal degree in co-relation 82126. Up to 6255 conditions per place. [2024-06-21 18:04:58,779 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 485 selfloop transitions, 235 changer transitions 0/725 dead transitions. [2024-06-21 18:04:58,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 725 transitions, 13369 flow [2024-06-21 18:04:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:04:58,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:04:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 18:04:58,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44986449864498645 [2024-06-21 18:04:58,780 INFO L175 Difference]: Start difference. First operand has 445 places, 700 transitions, 11171 flow. Second operand 9 states and 166 transitions. [2024-06-21 18:04:58,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 725 transitions, 13369 flow [2024-06-21 18:05:04,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 725 transitions, 12906 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 18:05:04,604 INFO L231 Difference]: Finished difference. Result has 449 places, 703 transitions, 11336 flow [2024-06-21 18:05:04,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10708, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11336, PETRI_PLACES=449, PETRI_TRANSITIONS=703} [2024-06-21 18:05:04,604 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-21 18:05:04,604 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 703 transitions, 11336 flow [2024-06-21 18:05:04,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:04,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:04,604 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 18:05:04,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 18:05:04,604 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:04,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:04,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1610708368, now seen corresponding path program 4 times [2024-06-21 18:05:04,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:04,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130934953] [2024-06-21 18:05:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:05,383 INFO 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 18:05:05,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:05,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130934953] [2024-06-21 18:05:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130934953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:05,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:05,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660927057] [2024-06-21 18:05:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:05,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:05,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:05,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:05,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:05,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 703 transitions, 11336 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:05,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:05,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:05,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:07,531 INFO L124 PetriNetUnfolderBase]: 4889/7707 cut-off events. [2024-06-21 18:05:07,531 INFO L125 PetriNetUnfolderBase]: For 2049218/2049220 co-relation queries the response was YES. [2024-06-21 18:05:07,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83834 conditions, 7707 events. 4889/7707 cut-off events. For 2049218/2049220 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48606 event pairs, 978 based on Foata normal form. 20/7726 useless extension candidates. Maximal degree in co-relation 83627. Up to 6299 conditions per place. [2024-06-21 18:05:07,670 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 487 selfloop transitions, 241 changer transitions 0/733 dead transitions. [2024-06-21 18:05:07,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 733 transitions, 13564 flow [2024-06-21 18:05:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 18:05:07,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-21 18:05:07,672 INFO L175 Difference]: Start difference. First operand has 449 places, 703 transitions, 11336 flow. Second operand 10 states and 181 transitions. [2024-06-21 18:05:07,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 733 transitions, 13564 flow [2024-06-21 18:05:13,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 733 transitions, 12978 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-21 18:05:13,100 INFO L231 Difference]: Finished difference. Result has 452 places, 709 transitions, 11396 flow [2024-06-21 18:05:13,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10758, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11396, PETRI_PLACES=452, PETRI_TRANSITIONS=709} [2024-06-21 18:05:13,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-21 18:05:13,100 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 709 transitions, 11396 flow [2024-06-21 18:05:13,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:13,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:13,101 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 18:05:13,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 18:05:13,101 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:13,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2133483720, now seen corresponding path program 5 times [2024-06-21 18:05:13,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:13,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101367683] [2024-06-21 18:05:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:13,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:13,781 INFO 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 18:05:13,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101367683] [2024-06-21 18:05:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101367683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:13,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:13,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916447217] [2024-06-21 18:05:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:13,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:13,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:13,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:13,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:13,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 709 transitions, 11396 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:13,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:13,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:13,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:16,230 INFO L124 PetriNetUnfolderBase]: 4893/7723 cut-off events. [2024-06-21 18:05:16,230 INFO L125 PetriNetUnfolderBase]: For 1965113/1965115 co-relation queries the response was YES. [2024-06-21 18:05:16,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82212 conditions, 7723 events. 4893/7723 cut-off events. For 1965113/1965115 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48717 event pairs, 964 based on Foata normal form. 16/7738 useless extension candidates. Maximal degree in co-relation 82004. Up to 6001 conditions per place. [2024-06-21 18:05:16,420 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 246 changer transitions 0/739 dead transitions. [2024-06-21 18:05:16,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 739 transitions, 13953 flow [2024-06-21 18:05:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 18:05:16,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 18:05:16,421 INFO L175 Difference]: Start difference. First operand has 452 places, 709 transitions, 11396 flow. Second operand 9 states and 168 transitions. [2024-06-21 18:05:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 739 transitions, 13953 flow [2024-06-21 18:05:20,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 739 transitions, 13449 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 18:05:20,861 INFO L231 Difference]: Finished difference. Result has 456 places, 712 transitions, 11562 flow [2024-06-21 18:05:20,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10892, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11562, PETRI_PLACES=456, PETRI_TRANSITIONS=712} [2024-06-21 18:05:20,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-21 18:05:20,862 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 712 transitions, 11562 flow [2024-06-21 18:05:20,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:20,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:20,862 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 18:05:20,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 18:05:20,862 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:20,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2127761988, now seen corresponding path program 9 times [2024-06-21 18:05:20,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:20,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603337122] [2024-06-21 18:05:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:20,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:21,651 INFO 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 18:05:21,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:21,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603337122] [2024-06-21 18:05:21,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603337122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:21,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:21,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:21,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469319770] [2024-06-21 18:05:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:21,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:21,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:21,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 712 transitions, 11562 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:21,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:21,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:21,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:24,034 INFO L124 PetriNetUnfolderBase]: 4883/7705 cut-off events. [2024-06-21 18:05:24,034 INFO L125 PetriNetUnfolderBase]: For 1838863/1838865 co-relation queries the response was YES. [2024-06-21 18:05:24,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81535 conditions, 7705 events. 4883/7705 cut-off events. For 1838863/1838865 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48663 event pairs, 1005 based on Foata normal form. 4/7708 useless extension candidates. Maximal degree in co-relation 81325. Up to 6766 conditions per place. [2024-06-21 18:05:24,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 173 changer transitions 0/730 dead transitions. [2024-06-21 18:05:24,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 730 transitions, 13216 flow [2024-06-21 18:05:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:24,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 18:05:24,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 18:05:24,164 INFO L175 Difference]: Start difference. First operand has 456 places, 712 transitions, 11562 flow. Second operand 9 states and 154 transitions. [2024-06-21 18:05:24,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 730 transitions, 13216 flow [2024-06-21 18:05:29,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 730 transitions, 12276 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-21 18:05:29,037 INFO L231 Difference]: Finished difference. Result has 456 places, 715 transitions, 11136 flow [2024-06-21 18:05:29,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11136, PETRI_PLACES=456, PETRI_TRANSITIONS=715} [2024-06-21 18:05:29,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-21 18:05:29,038 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 715 transitions, 11136 flow [2024-06-21 18:05:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:29,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:29,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:29,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 18:05:29,038 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:29,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:29,038 INFO L85 PathProgramCache]: Analyzing trace with hash 2127758268, now seen corresponding path program 10 times [2024-06-21 18:05:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:29,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522924167] [2024-06-21 18:05:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:29,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:29,858 INFO 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 18:05:29,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522924167] [2024-06-21 18:05:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522924167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:29,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:29,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:29,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774726239] [2024-06-21 18:05:29,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:29,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:29,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:29,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:29,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:29,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 715 transitions, 11136 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:29,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:29,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:29,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:32,254 INFO L124 PetriNetUnfolderBase]: 4889/7718 cut-off events. [2024-06-21 18:05:32,254 INFO L125 PetriNetUnfolderBase]: For 1822726/1822728 co-relation queries the response was YES. [2024-06-21 18:05:32,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78971 conditions, 7718 events. 4889/7718 cut-off events. For 1822726/1822728 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 48791 event pairs, 1007 based on Foata normal form. 4/7721 useless extension candidates. Maximal degree in co-relation 78762. Up to 6679 conditions per place. [2024-06-21 18:05:32,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 559 selfloop transitions, 177 changer transitions 0/741 dead transitions. [2024-06-21 18:05:32,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 741 transitions, 13252 flow [2024-06-21 18:05:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 18:05:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 18:05:32,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 18:05:32,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 18:05:32,393 INFO L175 Difference]: Start difference. First operand has 456 places, 715 transitions, 11136 flow. Second operand 9 states and 155 transitions. [2024-06-21 18:05:32,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 741 transitions, 13252 flow [2024-06-21 18:05:37,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 741 transitions, 12810 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-21 18:05:37,557 INFO L231 Difference]: Finished difference. Result has 460 places, 723 transitions, 11373 flow [2024-06-21 18:05:37,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10694, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11373, PETRI_PLACES=460, PETRI_TRANSITIONS=723} [2024-06-21 18:05:37,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-21 18:05:37,557 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 723 transitions, 11373 flow [2024-06-21 18:05:37,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:37,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:37,557 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 18:05:37,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 18:05:37,557 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:37,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:37,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2127912090, now seen corresponding path program 6 times [2024-06-21 18:05:37,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:37,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635674215] [2024-06-21 18:05:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:37,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:38,366 INFO 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 18:05:38,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:38,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635674215] [2024-06-21 18:05:38,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635674215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:38,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:38,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 18:05:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292198743] [2024-06-21 18:05:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 18:05:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 18:05:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 18:05:38,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:38,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 723 transitions, 11373 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:38,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:38,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:38,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:40,780 INFO L124 PetriNetUnfolderBase]: 4843/7639 cut-off events. [2024-06-21 18:05:40,780 INFO L125 PetriNetUnfolderBase]: For 1815839/1815841 co-relation queries the response was YES. [2024-06-21 18:05:40,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75827 conditions, 7639 events. 4843/7639 cut-off events. For 1815839/1815841 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 48170 event pairs, 970 based on Foata normal form. 20/7658 useless extension candidates. Maximal degree in co-relation 75616. Up to 6325 conditions per place. [2024-06-21 18:05:40,917 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 492 selfloop transitions, 250 changer transitions 0/747 dead transitions. [2024-06-21 18:05:40,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 747 transitions, 13497 flow [2024-06-21 18:05:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 18:05:40,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 18:05:40,918 INFO L175 Difference]: Start difference. First operand has 460 places, 723 transitions, 11373 flow. Second operand 10 states and 180 transitions. [2024-06-21 18:05:40,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 747 transitions, 13497 flow [2024-06-21 18:05:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 747 transitions, 13055 flow, removed 118 selfloop flow, removed 5 redundant places. [2024-06-21 18:05:46,303 INFO L231 Difference]: Finished difference. Result has 465 places, 723 transitions, 11441 flow [2024-06-21 18:05:46,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10931, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11441, PETRI_PLACES=465, PETRI_TRANSITIONS=723} [2024-06-21 18:05:46,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-21 18:05:46,304 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 723 transitions, 11441 flow [2024-06-21 18:05:46,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:46,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:46,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 18:05:46,304 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:46,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash 176321850, now seen corresponding path program 1 times [2024-06-21 18:05:46,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:46,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151055182] [2024-06-21 18:05:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:46,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:46,815 INFO 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 18:05:46,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151055182] [2024-06-21 18:05:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151055182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:46,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:46,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841489106] [2024-06-21 18:05:46,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:46,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:46,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:46,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 723 transitions, 11441 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:46,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:46,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:46,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:49,116 INFO L124 PetriNetUnfolderBase]: 4917/7763 cut-off events. [2024-06-21 18:05:49,116 INFO L125 PetriNetUnfolderBase]: For 1658790/1658790 co-relation queries the response was YES. [2024-06-21 18:05:49,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76556 conditions, 7763 events. 4917/7763 cut-off events. For 1658790/1658790 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 49080 event pairs, 916 based on Foata normal form. 2/7765 useless extension candidates. Maximal degree in co-relation 76343. Up to 7341 conditions per place. [2024-06-21 18:05:49,238 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 711 selfloop transitions, 63 changer transitions 0/779 dead transitions. [2024-06-21 18:05:49,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 779 transitions, 13432 flow [2024-06-21 18:05:49,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:49,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 18:05:49,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-21 18:05:49,239 INFO L175 Difference]: Start difference. First operand has 465 places, 723 transitions, 11441 flow. Second operand 10 states and 174 transitions. [2024-06-21 18:05:49,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 779 transitions, 13432 flow [2024-06-21 18:05:55,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 779 transitions, 12874 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 18:05:55,237 INFO L231 Difference]: Finished difference. Result has 468 places, 749 transitions, 11419 flow [2024-06-21 18:05:55,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10883, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11419, PETRI_PLACES=468, PETRI_TRANSITIONS=749} [2024-06-21 18:05:55,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-21 18:05:55,238 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 749 transitions, 11419 flow [2024-06-21 18:05:55,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:55,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:05:55,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:05:55,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 18:05:55,238 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:05:55,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:05:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash -756033626, now seen corresponding path program 2 times [2024-06-21 18:05:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:05:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650940885] [2024-06-21 18:05:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:05:55,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:05:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:05:55,772 INFO 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 18:05:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:05:55,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650940885] [2024-06-21 18:05:55,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650940885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:05:55,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:05:55,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:05:55,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874912162] [2024-06-21 18:05:55,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:05:55,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:05:55,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:05:55,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:05:55,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:05:55,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:05:55,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 749 transitions, 11419 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:05:55,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:05:55,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:05:55,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:05:58,200 INFO L124 PetriNetUnfolderBase]: 4945/7799 cut-off events. [2024-06-21 18:05:58,200 INFO L125 PetriNetUnfolderBase]: For 1693788/1693788 co-relation queries the response was YES. [2024-06-21 18:05:58,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77410 conditions, 7799 events. 4945/7799 cut-off events. For 1693788/1693788 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49298 event pairs, 919 based on Foata normal form. 2/7801 useless extension candidates. Maximal degree in co-relation 77194. Up to 7354 conditions per place. [2024-06-21 18:05:58,324 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 714 selfloop transitions, 71 changer transitions 0/790 dead transitions. [2024-06-21 18:05:58,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 790 transitions, 13657 flow [2024-06-21 18:05:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:05:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:05:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 18:05:58,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:05:58,325 INFO L175 Difference]: Start difference. First operand has 468 places, 749 transitions, 11419 flow. Second operand 10 states and 175 transitions. [2024-06-21 18:05:58,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 790 transitions, 13657 flow [2024-06-21 18:06:03,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 790 transitions, 13516 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 18:06:03,383 INFO L231 Difference]: Finished difference. Result has 475 places, 761 transitions, 11754 flow [2024-06-21 18:06:03,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11278, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11754, PETRI_PLACES=475, PETRI_TRANSITIONS=761} [2024-06-21 18:06:03,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-21 18:06:03,384 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 761 transitions, 11754 flow [2024-06-21 18:06:03,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:03,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:03,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:03,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 18:06:03,384 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:03,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 246840450, now seen corresponding path program 1 times [2024-06-21 18:06:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:03,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375552500] [2024-06-21 18:06:03,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:03,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:03,847 INFO 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 18:06:03,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:03,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375552500] [2024-06-21 18:06:03,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375552500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:03,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:03,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:06:03,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077049783] [2024-06-21 18:06:03,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:03,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:06:03,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:06:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:06:03,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:06:03,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 761 transitions, 11754 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:03,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:03,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:06:03,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:06,197 INFO L124 PetriNetUnfolderBase]: 4950/7795 cut-off events. [2024-06-21 18:06:06,197 INFO L125 PetriNetUnfolderBase]: For 1712535/1712535 co-relation queries the response was YES. [2024-06-21 18:06:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78194 conditions, 7795 events. 4950/7795 cut-off events. For 1712535/1712535 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 49075 event pairs, 892 based on Foata normal form. 1/7793 useless extension candidates. Maximal degree in co-relation 77975. Up to 7294 conditions per place. [2024-06-21 18:06:06,330 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 664 selfloop transitions, 108 changer transitions 0/777 dead transitions. [2024-06-21 18:06:06,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 777 transitions, 13438 flow [2024-06-21 18:06:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 18:06:06,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 18:06:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 18:06:06,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 18:06:06,331 INFO L175 Difference]: Start difference. First operand has 475 places, 761 transitions, 11754 flow. Second operand 7 states and 123 transitions. [2024-06-21 18:06:06,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 777 transitions, 13438 flow [2024-06-21 18:06:12,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 777 transitions, 13261 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 18:06:12,950 INFO L231 Difference]: Finished difference. Result has 478 places, 764 transitions, 11907 flow [2024-06-21 18:06:12,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11577, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11907, PETRI_PLACES=478, PETRI_TRANSITIONS=764} [2024-06-21 18:06:12,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-21 18:06:12,951 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 764 transitions, 11907 flow [2024-06-21 18:06:12,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:12,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:12,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 18:06:12,951 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:12,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1114505902, now seen corresponding path program 2 times [2024-06-21 18:06:12,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:12,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199118530] [2024-06-21 18:06:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:12,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:13,487 INFO 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 18:06:13,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:13,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199118530] [2024-06-21 18:06:13,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199118530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:13,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:13,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:06:13,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499207211] [2024-06-21 18:06:13,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:13,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:06:13,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:06:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:06:13,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:06:13,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 764 transitions, 11907 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:13,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:13,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:06:13,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:15,827 INFO L124 PetriNetUnfolderBase]: 4968/7822 cut-off events. [2024-06-21 18:06:15,827 INFO L125 PetriNetUnfolderBase]: For 1744511/1744511 co-relation queries the response was YES. [2024-06-21 18:06:15,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78870 conditions, 7822 events. 4968/7822 cut-off events. For 1744511/1744511 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 49304 event pairs, 892 based on Foata normal form. 1/7820 useless extension candidates. Maximal degree in co-relation 78649. Up to 7201 conditions per place. [2024-06-21 18:06:15,954 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 611 selfloop transitions, 172 changer transitions 0/788 dead transitions. [2024-06-21 18:06:15,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 788 transitions, 14008 flow [2024-06-21 18:06:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:06:15,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:06:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 18:06:15,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 18:06:15,955 INFO L175 Difference]: Start difference. First operand has 478 places, 764 transitions, 11907 flow. Second operand 8 states and 141 transitions. [2024-06-21 18:06:15,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 788 transitions, 14008 flow [2024-06-21 18:06:21,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 788 transitions, 13751 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 18:06:21,587 INFO L231 Difference]: Finished difference. Result has 482 places, 773 transitions, 12265 flow [2024-06-21 18:06:21,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11650, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12265, PETRI_PLACES=482, PETRI_TRANSITIONS=773} [2024-06-21 18:06:21,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-21 18:06:21,588 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 773 transitions, 12265 flow [2024-06-21 18:06:21,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:21,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:21,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:21,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 18:06:21,588 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:21,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2115181376, now seen corresponding path program 3 times [2024-06-21 18:06:21,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:21,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483847805] [2024-06-21 18:06:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:22,101 INFO 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 18:06:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483847805] [2024-06-21 18:06:22,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483847805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:22,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:22,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:06:22,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292424965] [2024-06-21 18:06:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:06:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:06:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:06:22,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:06:22,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 773 transitions, 12265 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:22,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:22,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:06:22,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:24,505 INFO L124 PetriNetUnfolderBase]: 4998/7875 cut-off events. [2024-06-21 18:06:24,505 INFO L125 PetriNetUnfolderBase]: For 1779688/1779688 co-relation queries the response was YES. [2024-06-21 18:06:24,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79717 conditions, 7875 events. 4998/7875 cut-off events. For 1779688/1779688 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49747 event pairs, 890 based on Foata normal form. 2/7877 useless extension candidates. Maximal degree in co-relation 79494. Up to 7406 conditions per place. [2024-06-21 18:06:24,634 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 729 selfloop transitions, 84 changer transitions 0/818 dead transitions. [2024-06-21 18:06:24,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 818 transitions, 14591 flow [2024-06-21 18:06:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 18:06:24,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 18:06:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 189 transitions. [2024-06-21 18:06:24,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4190687361419069 [2024-06-21 18:06:24,635 INFO L175 Difference]: Start difference. First operand has 482 places, 773 transitions, 12265 flow. Second operand 11 states and 189 transitions. [2024-06-21 18:06:24,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 818 transitions, 14591 flow [2024-06-21 18:06:31,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 818 transitions, 14323 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 18:06:31,689 INFO L231 Difference]: Finished difference. Result has 490 places, 788 transitions, 12555 flow [2024-06-21 18:06:31,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12009, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12555, PETRI_PLACES=490, PETRI_TRANSITIONS=788} [2024-06-21 18:06:31,690 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-21 18:06:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 788 transitions, 12555 flow [2024-06-21 18:06:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:31,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:31,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:31,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 18:06:31,690 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:31,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -386054180, now seen corresponding path program 3 times [2024-06-21 18:06:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:31,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285199647] [2024-06-21 18:06:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:31,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:32,182 INFO 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 18:06:32,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:32,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285199647] [2024-06-21 18:06:32,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285199647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:32,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:32,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:06:32,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241389529] [2024-06-21 18:06:32,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:32,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:06:32,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:06:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:06:32,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:06:32,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 788 transitions, 12555 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:32,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:32,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:06:32,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:34,528 INFO L124 PetriNetUnfolderBase]: 4995/7860 cut-off events. [2024-06-21 18:06:34,529 INFO L125 PetriNetUnfolderBase]: For 1763486/1763486 co-relation queries the response was YES. [2024-06-21 18:06:34,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80147 conditions, 7860 events. 4995/7860 cut-off events. For 1763486/1763486 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 49549 event pairs, 892 based on Foata normal form. 1/7858 useless extension candidates. Maximal degree in co-relation 79921. Up to 7224 conditions per place. [2024-06-21 18:06:34,659 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 630 selfloop transitions, 167 changer transitions 0/802 dead transitions. [2024-06-21 18:06:34,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 802 transitions, 14204 flow [2024-06-21 18:06:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:06:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:06:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 18:06:34,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 18:06:34,660 INFO L175 Difference]: Start difference. First operand has 490 places, 788 transitions, 12555 flow. Second operand 8 states and 140 transitions. [2024-06-21 18:06:34,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 802 transitions, 14204 flow [2024-06-21 18:06:41,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 802 transitions, 13913 flow, removed 84 selfloop flow, removed 7 redundant places. [2024-06-21 18:06:41,739 INFO L231 Difference]: Finished difference. Result has 491 places, 788 transitions, 12618 flow [2024-06-21 18:06:41,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12264, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12618, PETRI_PLACES=491, PETRI_TRANSITIONS=788} [2024-06-21 18:06:41,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-21 18:06:41,739 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 788 transitions, 12618 flow [2024-06-21 18:06:41,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:41,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:41,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:41,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 18:06:41,740 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:41,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:41,740 INFO L85 PathProgramCache]: Analyzing trace with hash -986413912, now seen corresponding path program 4 times [2024-06-21 18:06:41,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:41,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751580276] [2024-06-21 18:06:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:41,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:42,188 INFO 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 18:06:42,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:42,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751580276] [2024-06-21 18:06:42,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751580276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:42,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:42,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:06:42,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148802716] [2024-06-21 18:06:42,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:42,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:06:42,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:06:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:06:42,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:06:42,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 788 transitions, 12618 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:42,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:42,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:06:42,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:44,686 INFO L124 PetriNetUnfolderBase]: 5126/8084 cut-off events. [2024-06-21 18:06:44,686 INFO L125 PetriNetUnfolderBase]: For 1800124/1800126 co-relation queries the response was YES. [2024-06-21 18:06:44,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81386 conditions, 8084 events. 5126/8084 cut-off events. For 1800124/1800126 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51458 event pairs, 907 based on Foata normal form. 2/8085 useless extension candidates. Maximal degree in co-relation 81159. Up to 7148 conditions per place. [2024-06-21 18:06:44,822 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 685 selfloop transitions, 168 changer transitions 0/858 dead transitions. [2024-06-21 18:06:44,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 858 transitions, 14824 flow [2024-06-21 18:06:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:06:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:06:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 18:06:44,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 18:06:44,824 INFO L175 Difference]: Start difference. First operand has 491 places, 788 transitions, 12618 flow. Second operand 10 states and 186 transitions. [2024-06-21 18:06:44,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 858 transitions, 14824 flow [2024-06-21 18:06:51,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 858 transitions, 14573 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 18:06:51,357 INFO L231 Difference]: Finished difference. Result has 498 places, 820 transitions, 13129 flow [2024-06-21 18:06:51,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12367, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13129, PETRI_PLACES=498, PETRI_TRANSITIONS=820} [2024-06-21 18:06:51,358 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-21 18:06:51,358 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 820 transitions, 13129 flow [2024-06-21 18:06:51,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:51,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:06:51,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:06:51,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 18:06:51,359 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:06:51,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:06:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash 365745282, now seen corresponding path program 4 times [2024-06-21 18:06:51,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:06:51,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503243974] [2024-06-21 18:06:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:06:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:06:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:06:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:06:51,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:06:51,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503243974] [2024-06-21 18:06:51,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503243974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:06:51,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:06:51,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:06:51,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61611799] [2024-06-21 18:06:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:06:51,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:06:51,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:06:51,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:06:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:06:51,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:06:51,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 820 transitions, 13129 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:06:51,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:06:51,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:06:51,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:06:54,327 INFO L124 PetriNetUnfolderBase]: 5131/8077 cut-off events. [2024-06-21 18:06:54,327 INFO L125 PetriNetUnfolderBase]: For 1796101/1796101 co-relation queries the response was YES. [2024-06-21 18:06:54,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83009 conditions, 8077 events. 5131/8077 cut-off events. For 1796101/1796101 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51243 event pairs, 941 based on Foata normal form. 1/8075 useless extension candidates. Maximal degree in co-relation 82779. Up to 7556 conditions per place. [2024-06-21 18:06:54,464 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 731 selfloop transitions, 104 changer transitions 0/840 dead transitions. [2024-06-21 18:06:54,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 840 transitions, 14971 flow [2024-06-21 18:06:54,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:06:54,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:06:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 18:06:54,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 18:06:54,465 INFO L175 Difference]: Start difference. First operand has 498 places, 820 transitions, 13129 flow. Second operand 8 states and 134 transitions. [2024-06-21 18:06:54,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 840 transitions, 14971 flow [2024-06-21 18:07:01,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 840 transitions, 14651 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 18:07:01,647 INFO L231 Difference]: Finished difference. Result has 502 places, 823 transitions, 13126 flow [2024-06-21 18:07:01,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12809, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=820, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=716, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13126, PETRI_PLACES=502, PETRI_TRANSITIONS=823} [2024-06-21 18:07:01,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-21 18:07:01,648 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 823 transitions, 13126 flow [2024-06-21 18:07:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:01,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:01,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:01,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 18:07:01,648 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:01,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -787112122, now seen corresponding path program 5 times [2024-06-21 18:07:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:01,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539083453] [2024-06-21 18:07:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:01,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:07:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539083453] [2024-06-21 18:07:02,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539083453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:02,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:02,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:02,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617489524] [2024-06-21 18:07:02,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:02,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:02,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:02,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:02,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:02,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:07:02,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 823 transitions, 13126 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:02,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:02,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:07:02,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:04,831 INFO L124 PetriNetUnfolderBase]: 5141/8109 cut-off events. [2024-06-21 18:07:04,832 INFO L125 PetriNetUnfolderBase]: For 1833347/1833349 co-relation queries the response was YES. [2024-06-21 18:07:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83030 conditions, 8109 events. 5141/8109 cut-off events. For 1833347/1833349 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 51650 event pairs, 899 based on Foata normal form. 2/8110 useless extension candidates. Maximal degree in co-relation 82799. Up to 7169 conditions per place. [2024-06-21 18:07:04,970 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 683 selfloop transitions, 181 changer transitions 0/869 dead transitions. [2024-06-21 18:07:04,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 869 transitions, 15216 flow [2024-06-21 18:07:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:07:04,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-21 18:07:04,971 INFO L175 Difference]: Start difference. First operand has 502 places, 823 transitions, 13126 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:07:04,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 869 transitions, 15216 flow [2024-06-21 18:07:12,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 869 transitions, 14938 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 18:07:12,081 INFO L231 Difference]: Finished difference. Result has 508 places, 833 transitions, 13443 flow [2024-06-21 18:07:12,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12848, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13443, PETRI_PLACES=508, PETRI_TRANSITIONS=833} [2024-06-21 18:07:12,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-21 18:07:12,081 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 833 transitions, 13443 flow [2024-06-21 18:07:12,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:12,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:12,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:12,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 18:07:12,082 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:12,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1139985138, now seen corresponding path program 6 times [2024-06-21 18:07:12,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:12,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030266518] [2024-06-21 18:07:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:12,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:12,559 INFO 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 18:07:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030266518] [2024-06-21 18:07:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030266518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:12,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117678973] [2024-06-21 18:07:12,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:12,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:12,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:12,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:07:12,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 833 transitions, 13443 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:12,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:12,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:07:12,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:15,169 INFO L124 PetriNetUnfolderBase]: 5167/8135 cut-off events. [2024-06-21 18:07:15,169 INFO L125 PetriNetUnfolderBase]: For 1893052/1893054 co-relation queries the response was YES. [2024-06-21 18:07:15,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85817 conditions, 8135 events. 5167/8135 cut-off events. For 1893052/1893054 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 51776 event pairs, 906 based on Foata normal form. 2/8136 useless extension candidates. Maximal degree in co-relation 85583. Up to 7166 conditions per place. [2024-06-21 18:07:15,317 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 674 selfloop transitions, 195 changer transitions 0/874 dead transitions. [2024-06-21 18:07:15,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 874 transitions, 15927 flow [2024-06-21 18:07:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:07:15,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-21 18:07:15,318 INFO L175 Difference]: Start difference. First operand has 508 places, 833 transitions, 13443 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:07:15,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 874 transitions, 15927 flow [2024-06-21 18:07:21,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 874 transitions, 15524 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-21 18:07:21,484 INFO L231 Difference]: Finished difference. Result has 513 places, 839 transitions, 13714 flow [2024-06-21 18:07:21,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13040, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=833, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13714, PETRI_PLACES=513, PETRI_TRANSITIONS=839} [2024-06-21 18:07:21,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-21 18:07:21,485 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 839 transitions, 13714 flow [2024-06-21 18:07:21,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:21,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:21,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:21,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 18:07:21,485 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:21,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1349642478, now seen corresponding path program 7 times [2024-06-21 18:07:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:21,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352552771] [2024-06-21 18:07:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:21,971 INFO 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 18:07:21,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:21,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352552771] [2024-06-21 18:07:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352552771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:21,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929324251] [2024-06-21 18:07:21,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:21,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:21,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:21,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:21,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:22,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:07:22,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 839 transitions, 13714 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:22,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:22,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:07:22,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:24,647 INFO L124 PetriNetUnfolderBase]: 5190/8176 cut-off events. [2024-06-21 18:07:24,648 INFO L125 PetriNetUnfolderBase]: For 1937037/1937039 co-relation queries the response was YES. [2024-06-21 18:07:24,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87084 conditions, 8176 events. 5190/8176 cut-off events. For 1937037/1937039 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 52115 event pairs, 908 based on Foata normal form. 2/8177 useless extension candidates. Maximal degree in co-relation 86849. Up to 7211 conditions per place. [2024-06-21 18:07:24,786 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 693 selfloop transitions, 184 changer transitions 0/882 dead transitions. [2024-06-21 18:07:24,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 882 transitions, 16254 flow [2024-06-21 18:07:24,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:24,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:24,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 18:07:24,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45365853658536587 [2024-06-21 18:07:24,787 INFO L175 Difference]: Start difference. First operand has 513 places, 839 transitions, 13714 flow. Second operand 10 states and 186 transitions. [2024-06-21 18:07:24,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 882 transitions, 16254 flow [2024-06-21 18:07:31,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 882 transitions, 15865 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-21 18:07:31,843 INFO L231 Difference]: Finished difference. Result has 518 places, 848 transitions, 14068 flow [2024-06-21 18:07:31,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13341, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=839, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=658, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14068, PETRI_PLACES=518, PETRI_TRANSITIONS=848} [2024-06-21 18:07:31,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-21 18:07:31,843 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 848 transitions, 14068 flow [2024-06-21 18:07:31,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:31,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:31,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:31,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 18:07:31,843 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:31,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1024693968, now seen corresponding path program 8 times [2024-06-21 18:07:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:31,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169554411] [2024-06-21 18:07:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:31,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:32,368 INFO 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 18:07:32,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:32,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169554411] [2024-06-21 18:07:32,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169554411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:32,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:32,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251090656] [2024-06-21 18:07:32,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:32,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:32,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:32,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:32,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:07:32,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 848 transitions, 14068 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:32,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:32,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:07:32,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:35,071 INFO L124 PetriNetUnfolderBase]: 5249/8255 cut-off events. [2024-06-21 18:07:35,072 INFO L125 PetriNetUnfolderBase]: For 2002547/2002549 co-relation queries the response was YES. [2024-06-21 18:07:35,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88829 conditions, 8255 events. 5249/8255 cut-off events. For 2002547/2002549 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 52556 event pairs, 910 based on Foata normal form. 2/8256 useless extension candidates. Maximal degree in co-relation 88591. Up to 7176 conditions per place. [2024-06-21 18:07:35,223 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 663 selfloop transitions, 234 changer transitions 0/902 dead transitions. [2024-06-21 18:07:35,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 902 transitions, 17238 flow [2024-06-21 18:07:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 18:07:35,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:07:35,224 INFO L175 Difference]: Start difference. First operand has 518 places, 848 transitions, 14068 flow. Second operand 10 states and 185 transitions. [2024-06-21 18:07:35,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 902 transitions, 17238 flow [2024-06-21 18:07:41,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 902 transitions, 16877 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-21 18:07:41,510 INFO L231 Difference]: Finished difference. Result has 524 places, 868 transitions, 14924 flow [2024-06-21 18:07:41,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13707, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14924, PETRI_PLACES=524, PETRI_TRANSITIONS=868} [2024-06-21 18:07:41,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-21 18:07:41,510 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 868 transitions, 14924 flow [2024-06-21 18:07:41,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:41,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:41,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:41,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 18:07:41,511 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:41,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:41,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1620792720, now seen corresponding path program 5 times [2024-06-21 18:07:41,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:41,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681279498] [2024-06-21 18:07:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:41,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:41,986 INFO 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 18:07:41,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:41,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681279498] [2024-06-21 18:07:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681279498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:41,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:41,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:07:41,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338846165] [2024-06-21 18:07:41,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:41,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:07:41,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:07:41,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:07:42,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:07:42,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 868 transitions, 14924 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:42,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:42,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:07:42,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:44,612 INFO L124 PetriNetUnfolderBase]: 5254/8252 cut-off events. [2024-06-21 18:07:44,612 INFO L125 PetriNetUnfolderBase]: For 2019140/2019140 co-relation queries the response was YES. [2024-06-21 18:07:44,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90188 conditions, 8252 events. 5254/8252 cut-off events. For 2019140/2019140 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 52394 event pairs, 929 based on Foata normal form. 1/8250 useless extension candidates. Maximal degree in co-relation 89946. Up to 7601 conditions per place. [2024-06-21 18:07:44,763 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 727 selfloop transitions, 154 changer transitions 0/886 dead transitions. [2024-06-21 18:07:44,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 886 transitions, 17142 flow [2024-06-21 18:07:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:07:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:07:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:07:44,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:07:44,764 INFO L175 Difference]: Start difference. First operand has 524 places, 868 transitions, 14924 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:07:44,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 886 transitions, 17142 flow [2024-06-21 18:07:52,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 886 transitions, 16735 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-21 18:07:52,160 INFO L231 Difference]: Finished difference. Result has 527 places, 871 transitions, 14936 flow [2024-06-21 18:07:52,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14517, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14936, PETRI_PLACES=527, PETRI_TRANSITIONS=871} [2024-06-21 18:07:52,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-21 18:07:52,161 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 871 transitions, 14936 flow [2024-06-21 18:07:52,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:52,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:07:52,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:07:52,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 18:07:52,161 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:07:52,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:07:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1053834752, now seen corresponding path program 9 times [2024-06-21 18:07:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:07:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249729305] [2024-06-21 18:07:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:07:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:07:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:07:52,662 INFO 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 18:07:52,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:07:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249729305] [2024-06-21 18:07:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249729305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:07:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:07:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:07:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13989498] [2024-06-21 18:07:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:07:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:07:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:07:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:07:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:07:52,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:07:52,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 871 transitions, 14936 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:07:52,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:07:52,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:07:52,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:07:55,397 INFO L124 PetriNetUnfolderBase]: 5272/8291 cut-off events. [2024-06-21 18:07:55,397 INFO L125 PetriNetUnfolderBase]: For 2044660/2044662 co-relation queries the response was YES. [2024-06-21 18:07:55,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89575 conditions, 8291 events. 5272/8291 cut-off events. For 2044660/2044662 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 52784 event pairs, 908 based on Foata normal form. 2/8292 useless extension candidates. Maximal degree in co-relation 89331. Up to 7202 conditions per place. [2024-06-21 18:07:55,541 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 671 selfloop transitions, 235 changer transitions 0/911 dead transitions. [2024-06-21 18:07:55,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 911 transitions, 17777 flow [2024-06-21 18:07:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:07:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:07:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 18:07:55,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-21 18:07:55,555 INFO L175 Difference]: Start difference. First operand has 527 places, 871 transitions, 14936 flow. Second operand 10 states and 185 transitions. [2024-06-21 18:07:55,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 911 transitions, 17777 flow [2024-06-21 18:08:03,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 911 transitions, 17411 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 18:08:03,057 INFO L231 Difference]: Finished difference. Result has 533 places, 878 transitions, 15411 flow [2024-06-21 18:08:03,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14571, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15411, PETRI_PLACES=533, PETRI_TRANSITIONS=878} [2024-06-21 18:08:03,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-21 18:08:03,057 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 878 transitions, 15411 flow [2024-06-21 18:08:03,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:03,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:03,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:03,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 18:08:03,057 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:03,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1024515222, now seen corresponding path program 6 times [2024-06-21 18:08:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998980923] [2024-06-21 18:08:03,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:03,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:03,564 INFO 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 18:08:03,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:03,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998980923] [2024-06-21 18:08:03,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998980923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:03,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:03,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:08:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910481539] [2024-06-21 18:08:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:08:03,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:08:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:08:03,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:08:03,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 878 transitions, 15411 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:03,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:03,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:08:03,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:06,300 INFO L124 PetriNetUnfolderBase]: 5269/8273 cut-off events. [2024-06-21 18:08:06,300 INFO L125 PetriNetUnfolderBase]: For 2047013/2047013 co-relation queries the response was YES. [2024-06-21 18:08:06,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90010 conditions, 8273 events. 5269/8273 cut-off events. For 2047013/2047013 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 52536 event pairs, 899 based on Foata normal form. 1/8271 useless extension candidates. Maximal degree in co-relation 89764. Up to 7623 conditions per place. [2024-06-21 18:08:06,451 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 715 selfloop transitions, 172 changer transitions 0/892 dead transitions. [2024-06-21 18:08:06,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 892 transitions, 17246 flow [2024-06-21 18:08:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:08:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:08:06,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 18:08:06,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 18:08:06,452 INFO L175 Difference]: Start difference. First operand has 533 places, 878 transitions, 15411 flow. Second operand 8 states and 136 transitions. [2024-06-21 18:08:06,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 892 transitions, 17246 flow [2024-06-21 18:08:14,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 892 transitions, 16688 flow, removed 95 selfloop flow, removed 6 redundant places. [2024-06-21 18:08:14,671 INFO L231 Difference]: Finished difference. Result has 535 places, 878 transitions, 15203 flow [2024-06-21 18:08:14,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14853, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15203, PETRI_PLACES=535, PETRI_TRANSITIONS=878} [2024-06-21 18:08:14,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-21 18:08:14,671 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 878 transitions, 15203 flow [2024-06-21 18:08:14,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:14,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:14,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:14,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 18:08:14,672 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:14,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1664257260, now seen corresponding path program 7 times [2024-06-21 18:08:14,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:14,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073858884] [2024-06-21 18:08:14,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:15,195 INFO 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 18:08:15,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:15,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073858884] [2024-06-21 18:08:15,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073858884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:15,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:15,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:08:15,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394252051] [2024-06-21 18:08:15,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:08:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:08:15,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:08:15,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:08:15,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 878 transitions, 15203 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:15,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:15,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:08:15,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:17,747 INFO L124 PetriNetUnfolderBase]: 5282/8291 cut-off events. [2024-06-21 18:08:17,747 INFO L125 PetriNetUnfolderBase]: For 2084751/2084755 co-relation queries the response was YES. [2024-06-21 18:08:17,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90027 conditions, 8291 events. 5282/8291 cut-off events. For 2084751/2084755 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 52654 event pairs, 970 based on Foata normal form. 5/8293 useless extension candidates. Maximal degree in co-relation 89780. Up to 7417 conditions per place. [2024-06-21 18:08:18,047 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 613 selfloop transitions, 279 changer transitions 0/897 dead transitions. [2024-06-21 18:08:18,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 897 transitions, 17816 flow [2024-06-21 18:08:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:08:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:08:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 18:08:18,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 18:08:18,048 INFO L175 Difference]: Start difference. First operand has 535 places, 878 transitions, 15203 flow. Second operand 8 states and 138 transitions. [2024-06-21 18:08:18,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 897 transitions, 17816 flow [2024-06-21 18:08:26,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 897 transitions, 17356 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 18:08:26,787 INFO L231 Difference]: Finished difference. Result has 535 places, 884 transitions, 15489 flow [2024-06-21 18:08:26,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14743, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15489, PETRI_PLACES=535, PETRI_TRANSITIONS=884} [2024-06-21 18:08:26,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-21 18:08:26,788 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 884 transitions, 15489 flow [2024-06-21 18:08:26,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:26,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:26,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:26,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 18:08:26,789 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:26,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:26,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1917027536, now seen corresponding path program 10 times [2024-06-21 18:08:26,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:26,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312933173] [2024-06-21 18:08:26,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:26,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:26,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:27,325 INFO 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 18:08:27,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:27,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312933173] [2024-06-21 18:08:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312933173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:27,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:27,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:08:27,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636896477] [2024-06-21 18:08:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:27,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:08:27,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:27,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:08:27,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:08:27,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:08:27,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 884 transitions, 15489 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:27,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:27,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:08:27,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:30,094 INFO L124 PetriNetUnfolderBase]: 5292/8317 cut-off events. [2024-06-21 18:08:30,094 INFO L125 PetriNetUnfolderBase]: For 2124300/2124300 co-relation queries the response was YES. [2024-06-21 18:08:30,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90641 conditions, 8317 events. 5292/8317 cut-off events. For 2124300/2124300 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 52930 event pairs, 945 based on Foata normal form. 2/8318 useless extension candidates. Maximal degree in co-relation 90393. Up to 7901 conditions per place. [2024-06-21 18:08:30,240 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 839 selfloop transitions, 64 changer transitions 0/908 dead transitions. [2024-06-21 18:08:30,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 908 transitions, 17511 flow [2024-06-21 18:08:30,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:08:30,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:08:30,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 18:08:30,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 18:08:30,241 INFO L175 Difference]: Start difference. First operand has 535 places, 884 transitions, 15489 flow. Second operand 10 states and 164 transitions. [2024-06-21 18:08:30,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 908 transitions, 17511 flow [2024-06-21 18:08:38,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 908 transitions, 16818 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 18:08:38,174 INFO L231 Difference]: Finished difference. Result has 540 places, 887 transitions, 15073 flow [2024-06-21 18:08:38,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14796, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15073, PETRI_PLACES=540, PETRI_TRANSITIONS=887} [2024-06-21 18:08:38,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-21 18:08:38,175 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 887 transitions, 15073 flow [2024-06-21 18:08:38,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:38,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:38,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:38,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 18:08:38,176 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:38,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1032187168, now seen corresponding path program 8 times [2024-06-21 18:08:38,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:38,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352829714] [2024-06-21 18:08:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:38,699 INFO 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 18:08:38,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:38,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352829714] [2024-06-21 18:08:38,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352829714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:38,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:38,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:08:38,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013352025] [2024-06-21 18:08:38,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:38,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:08:38,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:38,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:08:38,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:08:38,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:08:38,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 887 transitions, 15073 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:38,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:38,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:08:38,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:41,525 INFO L124 PetriNetUnfolderBase]: 5310/8339 cut-off events. [2024-06-21 18:08:41,525 INFO L125 PetriNetUnfolderBase]: For 2152073/2152073 co-relation queries the response was YES. [2024-06-21 18:08:41,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91172 conditions, 8339 events. 5310/8339 cut-off events. For 2152073/2152073 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53065 event pairs, 955 based on Foata normal form. 1/8337 useless extension candidates. Maximal degree in co-relation 90923. Up to 7849 conditions per place. [2024-06-21 18:08:41,675 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 813 selfloop transitions, 92 changer transitions 0/910 dead transitions. [2024-06-21 18:08:41,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 910 transitions, 17739 flow [2024-06-21 18:08:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:08:41,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:08:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-21 18:08:41,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878048780487805 [2024-06-21 18:08:41,676 INFO L175 Difference]: Start difference. First operand has 540 places, 887 transitions, 15073 flow. Second operand 10 states and 159 transitions. [2024-06-21 18:08:41,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 910 transitions, 17739 flow [2024-06-21 18:08:48,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 910 transitions, 17494 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 18:08:48,645 INFO L231 Difference]: Finished difference. Result has 544 places, 896 transitions, 15237 flow [2024-06-21 18:08:48,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14828, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=887, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15237, PETRI_PLACES=544, PETRI_TRANSITIONS=896} [2024-06-21 18:08:48,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-21 18:08:48,646 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 896 transitions, 15237 flow [2024-06-21 18:08:48,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:48,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:48,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:48,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 18:08:48,646 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:48,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:48,646 INFO L85 PathProgramCache]: Analyzing trace with hash -526972712, now seen corresponding path program 9 times [2024-06-21 18:08:48,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:48,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230595377] [2024-06-21 18:08:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:48,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:08:49,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 18:08:49,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:08:49,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230595377] [2024-06-21 18:08:49,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230595377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:08:49,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:08:49,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:08:49,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492885930] [2024-06-21 18:08:49,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:08:49,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:08:49,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:08:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:08:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:08:49,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:08:49,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 896 transitions, 15237 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:49,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:08:49,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:08:49,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:08:51,943 INFO L124 PetriNetUnfolderBase]: 5307/8335 cut-off events. [2024-06-21 18:08:51,944 INFO L125 PetriNetUnfolderBase]: For 2164022/2164022 co-relation queries the response was YES. [2024-06-21 18:08:52,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91016 conditions, 8335 events. 5307/8335 cut-off events. For 2164022/2164022 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 53054 event pairs, 955 based on Foata normal form. 1/8333 useless extension candidates. Maximal degree in co-relation 90765. Up to 7846 conditions per place. [2024-06-21 18:08:52,094 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 814 selfloop transitions, 88 changer transitions 0/907 dead transitions. [2024-06-21 18:08:52,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 907 transitions, 17383 flow [2024-06-21 18:08:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:08:52,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:08:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 18:08:52,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 18:08:52,095 INFO L175 Difference]: Start difference. First operand has 544 places, 896 transitions, 15237 flow. Second operand 8 states and 132 transitions. [2024-06-21 18:08:52,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 907 transitions, 17383 flow [2024-06-21 18:08:59,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 907 transitions, 16946 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-21 18:08:59,538 INFO L231 Difference]: Finished difference. Result has 546 places, 896 transitions, 14985 flow [2024-06-21 18:08:59,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14800, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=808, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14985, PETRI_PLACES=546, PETRI_TRANSITIONS=896} [2024-06-21 18:08:59,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-21 18:08:59,538 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 896 transitions, 14985 flow [2024-06-21 18:08:59,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:08:59,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:08:59,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:08:59,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 18:08:59,539 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:08:59,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:08:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash -521466182, now seen corresponding path program 10 times [2024-06-21 18:08:59,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:08:59,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425319925] [2024-06-21 18:08:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:08:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:08:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:00,036 INFO 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 18:09:00,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:00,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425319925] [2024-06-21 18:09:00,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425319925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:00,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:00,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 18:09:00,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152393606] [2024-06-21 18:09:00,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:00,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 18:09:00,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:00,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 18:09:00,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 18:09:00,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:09:00,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 896 transitions, 14985 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:00,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:00,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:09:00,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:09:02,593 INFO L124 PetriNetUnfolderBase]: 5312/8337 cut-off events. [2024-06-21 18:09:02,593 INFO L125 PetriNetUnfolderBase]: For 2189894/2189898 co-relation queries the response was YES. [2024-06-21 18:09:02,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90933 conditions, 8337 events. 5312/8337 cut-off events. For 2189894/2189898 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 52989 event pairs, 972 based on Foata normal form. 5/8339 useless extension candidates. Maximal degree in co-relation 90683. Up to 7453 conditions per place. [2024-06-21 18:09:02,916 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 656 selfloop transitions, 251 changer transitions 0/912 dead transitions. [2024-06-21 18:09:02,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 912 transitions, 17555 flow [2024-06-21 18:09:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 18:09:02,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 18:09:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 18:09:02,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 18:09:02,917 INFO L175 Difference]: Start difference. First operand has 546 places, 896 transitions, 14985 flow. Second operand 8 states and 137 transitions. [2024-06-21 18:09:02,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 912 transitions, 17555 flow [2024-06-21 18:09:10,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 912 transitions, 17414 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 18:09:10,367 INFO L231 Difference]: Finished difference. Result has 548 places, 899 transitions, 15449 flow [2024-06-21 18:09:10,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14844, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15449, PETRI_PLACES=548, PETRI_TRANSITIONS=899} [2024-06-21 18:09:10,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-21 18:09:10,368 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 899 transitions, 15449 flow [2024-06-21 18:09:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:10,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 18:09:10,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 18:09:10,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 18:09:10,368 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 18:09:10,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 18:09:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1435969974, now seen corresponding path program 11 times [2024-06-21 18:09:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 18:09:10,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606650145] [2024-06-21 18:09:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 18:09:10,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 18:09:10,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 18:09:10,884 INFO 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 18:09:10,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 18:09:10,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606650145] [2024-06-21 18:09:10,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606650145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 18:09:10,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 18:09:10,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 18:09:10,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079954331] [2024-06-21 18:09:10,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 18:09:10,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 18:09:10,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 18:09:10,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 18:09:10,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 18:09:10,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 18:09:10,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 899 transitions, 15449 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 18:09:10,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 18:09:10,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 18:09:10,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 18:09:13,816 INFO L124 PetriNetUnfolderBase]: 5445/8543 cut-off events. [2024-06-21 18:09:13,816 INFO L125 PetriNetUnfolderBase]: For 2319018/2319020 co-relation queries the response was YES. [2024-06-21 18:09:13,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95065 conditions, 8543 events. 5445/8543 cut-off events. For 2319018/2319020 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 54552 event pairs, 979 based on Foata normal form. 2/8544 useless extension candidates. Maximal degree in co-relation 94814. Up to 7206 conditions per place. [2024-06-21 18:09:13,973 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 649 selfloop transitions, 318 changer transitions 0/972 dead transitions. [2024-06-21 18:09:13,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 972 transitions, 19562 flow [2024-06-21 18:09:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 18:09:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 18:09:13,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 18:09:13,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44878048780487806 [2024-06-21 18:09:13,974 INFO L175 Difference]: Start difference. First operand has 548 places, 899 transitions, 15449 flow. Second operand 10 states and 184 transitions. [2024-06-21 18:09:13,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 972 transitions, 19562 flow