./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_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/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_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/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_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 17:20:08,522 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:20:08,581 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:20:08,597 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:20:08,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:20:08,631 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:20:08,632 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:20:08,632 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:20:08,633 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:20:08,636 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:20:08,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:20:08,636 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:20:08,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:20:08,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:20:08,638 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:20:08,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:20:08,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:20:08,639 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:20:08,639 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:20:08,639 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:20:08,641 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:20:08,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:20:08,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:20:08,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:20:08,642 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:20:08,642 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:20:08,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:20:08,642 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:20:08,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:20:08,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:20:08,644 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:20:08,644 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:20:08,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:20:08,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:20:08,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:20:08,645 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:20:08,645 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:20:08,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:20:08,645 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:20:08,645 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:20:08,650 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:20:08,650 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:20:08,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:20:08,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:20:08,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:20:08,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:20:08,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:20:08,871 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:20:08,871 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:20:08,872 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:20:09,916 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:20:10,109 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:20:10,110 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:20:10,123 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42732affe/7af25eee6b4440d28b2342abe4d472f5/FLAG50fbfdf80 [2024-06-21 17:20:10,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42732affe/7af25eee6b4440d28b2342abe4d472f5 [2024-06-21 17:20:10,141 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:20:10,141 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:20:10,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 17:20:10,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:20:10,315 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:20:10,320 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:20:10,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:20:10,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:20:10,324 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:20:10" (1/2) ... [2024-06-21 17:20:10,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1460aa6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:20:10, skipping insertion in model container [2024-06-21 17:20:10,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:20:10" (1/2) ... [2024-06-21 17:20:10,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74345ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:20:10, skipping insertion in model container [2024-06-21 17:20:10,327 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:20:10" (2/2) ... [2024-06-21 17:20:10,327 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1460aa6f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:20:10, skipping insertion in model container [2024-06-21 17:20:10,327 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:20:10" (2/2) ... [2024-06-21 17:20:10,328 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:20:10,400 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:20:10,401 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:20:10,402 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:20:10,402 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((! multithreaded || y$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2))) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) [2024-06-21 17:20:10,402 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:20:10,402 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-21 17:20:10,442 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:20:10,768 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:20:10,784 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:20:10,890 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:20:10,924 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:20:10,925 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:20:10 WrapperNode [2024-06-21 17:20:10,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:20:10,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:20:10,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:20:10,927 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:20:10,933 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 05:20:10" (1/1) ... [2024-06-21 17:20:10,965 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 05:20:10" (1/1) ... [2024-06-21 17:20:10,999 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 17:20:11,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:20:11,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:20:11,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:20:11,001 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:20:11,010 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,011 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,025 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,042 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 17:20:11,043 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,043 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,050 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,051 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,053 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,054 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,056 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:20:11,057 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:20:11,057 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:20:11,057 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:20:11,058 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 05:20:10" (1/1) ... [2024-06-21 17:20:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:20:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:20:11,087 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 17:20:11,108 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 17:20:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:20:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:20:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:20:11,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:20:11,119 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:20:11,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:20:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:20:11,120 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:20:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:20:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:20:11,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:20:11,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:20:11,122 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 17:20:11,255 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:20:11,258 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:20:11,577 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:20:11,577 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:20:11,754 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:20:11,756 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:20:11,757 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:20:11 BoogieIcfgContainer [2024-06-21 17:20:11,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:20:11,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:20:11,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:20:11,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:20:11,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:20:10" (1/4) ... [2024-06-21 17:20:11,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54843d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:20:11, skipping insertion in model container [2024-06-21 17:20:11,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:20:10" (2/4) ... [2024-06-21 17:20:11,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54843d35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:20:11, skipping insertion in model container [2024-06-21 17:20:11,763 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 05:20:10" (3/4) ... [2024-06-21 17:20:11,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54843d35 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:20:11, skipping insertion in model container [2024-06-21 17:20:11,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:20:11" (4/4) ... [2024-06-21 17:20:11,764 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-21 17:20:11,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:20:11,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:20:11,777 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:20:11,818 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:20:11,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:20:11,874 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 17:20:11,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:20:11,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:20:11,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:20:11,879 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 17:20:11,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:20:11,895 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;@78f6c0dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:20:11,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:20:11,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:20:11,899 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 17:20:11,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:20:11,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:11,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:20:11,900 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 17:20:11,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:11,903 INFO L85 PathProgramCache]: Analyzing trace with hash 441899971, now seen corresponding path program 1 times [2024-06-21 17:20:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279940668] [2024-06-21 17:20:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:12,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:12,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279940668] [2024-06-21 17:20:12,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279940668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:12,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:12,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:20:12,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375984053] [2024-06-21 17:20:12,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:12,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:20:12,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:20:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:20:12,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:20:12,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:12,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:12,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:20:12,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:13,154 INFO L124 PetriNetUnfolderBase]: 1354/2038 cut-off events. [2024-06-21 17:20:13,155 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-21 17:20:13,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4150 conditions, 2038 events. 1354/2038 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9585 event pairs, 709 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 4138. Up to 2016 conditions per place. [2024-06-21 17:20:13,170 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 17:20:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 181 flow [2024-06-21 17:20:13,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:20:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:20:13,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 17:20:13,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 17:20:13,180 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-21 17:20:13,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 181 flow [2024-06-21 17:20:13,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:13,185 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 17:20:13,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 17:20:13,189 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 17:20:13,189 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 17:20:13,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:13,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:13,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:13,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:20:13,190 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 17:20:13,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:13,190 INFO L85 PathProgramCache]: Analyzing trace with hash -535779076, now seen corresponding path program 1 times [2024-06-21 17:20:13,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:13,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282396614] [2024-06-21 17:20:13,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:13,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282396614] [2024-06-21 17:20:13,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282396614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:13,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:20:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84679523] [2024-06-21 17:20:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:13,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:20:13,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:20:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:20:13,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-06-21 17:20:13,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:13,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:13,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-06-21 17:20:13,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:14,087 INFO L124 PetriNetUnfolderBase]: 1363/2050 cut-off events. [2024-06-21 17:20:14,088 INFO L125 PetriNetUnfolderBase]: For 316/319 co-relation queries the response was YES. [2024-06-21 17:20:14,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4738 conditions, 2050 events. 1363/2050 cut-off events. For 316/319 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9433 event pairs, 772 based on Foata normal form. 8/2057 useless extension candidates. Maximal degree in co-relation 4726. Up to 2013 conditions per place. [2024-06-21 17:20:14,098 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-21 17:20:14,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 266 flow [2024-06-21 17:20:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:20:14,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:20:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-21 17:20:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 17:20:14,102 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 92 transitions. [2024-06-21 17:20:14,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 266 flow [2024-06-21 17:20:14,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:20:14,105 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-21 17:20:14,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 17:20:14,106 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 17:20:14,106 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-21 17:20:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:14,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:14,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:14,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:20:14,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:14,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:14,110 INFO L85 PathProgramCache]: Analyzing trace with hash 570718658, now seen corresponding path program 1 times [2024-06-21 17:20:14,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:14,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867635461] [2024-06-21 17:20:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:14,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:14,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:14,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867635461] [2024-06-21 17:20:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867635461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:14,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:14,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:20:14,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696207364] [2024-06-21 17:20:14,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:14,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:20:14,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:20:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:20:14,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:20:14,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:14,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:14,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:20:14,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:15,077 INFO L124 PetriNetUnfolderBase]: 1664/2484 cut-off events. [2024-06-21 17:20:15,077 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-06-21 17:20:15,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 2484 events. 1664/2484 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11396 event pairs, 791 based on Foata normal form. 6/2490 useless extension candidates. Maximal degree in co-relation 6461. Up to 2418 conditions per place. [2024-06-21 17:20:15,089 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 62 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-21 17:20:15,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 407 flow [2024-06-21 17:20:15,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:20:15,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:20:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-21 17:20:15,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-21 17:20:15,094 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 111 transitions. [2024-06-21 17:20:15,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 407 flow [2024-06-21 17:20:15,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 76 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 17:20:15,098 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 230 flow [2024-06-21 17:20:15,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-06-21 17:20:15,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-21 17:20:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 230 flow [2024-06-21 17:20:15,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:15,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:15,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:20:15,101 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 17:20:15,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 429293185, now seen corresponding path program 1 times [2024-06-21 17:20:15,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:15,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853375241] [2024-06-21 17:20:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:15,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:15,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:15,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853375241] [2024-06-21 17:20:15,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853375241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:15,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:15,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:20:15,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68444239] [2024-06-21 17:20:15,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:15,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:20:15,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:15,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:20:15,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:20:15,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:20:15,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 230 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:15,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:15,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:20:15,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:16,292 INFO L124 PetriNetUnfolderBase]: 1658/2475 cut-off events. [2024-06-21 17:20:16,292 INFO L125 PetriNetUnfolderBase]: For 2199/2199 co-relation queries the response was YES. [2024-06-21 17:20:16,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7118 conditions, 2475 events. 1658/2475 cut-off events. For 2199/2199 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11209 event pairs, 722 based on Foata normal form. 3/2478 useless extension candidates. Maximal degree in co-relation 7099. Up to 2418 conditions per place. [2024-06-21 17:20:16,305 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 69 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-21 17:20:16,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 507 flow [2024-06-21 17:20:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 17:20:16,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-21 17:20:16,306 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 230 flow. Second operand 6 states and 124 transitions. [2024-06-21 17:20:16,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 507 flow [2024-06-21 17:20:16,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 503 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 17:20:16,311 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 325 flow [2024-06-21 17:20:16,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-21 17:20:16,312 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 17:20:16,312 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 325 flow [2024-06-21 17:20:16,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:16,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:16,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:16,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:20:16,313 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:16,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:16,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1295155967, now seen corresponding path program 1 times [2024-06-21 17:20:16,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:16,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081050170] [2024-06-21 17:20:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:17,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:17,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081050170] [2024-06-21 17:20:17,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081050170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:17,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:17,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:20:17,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97085804] [2024-06-21 17:20:17,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:20:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:20:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:20:17,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:20:17,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:17,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:17,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:20:17,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:17,549 INFO L124 PetriNetUnfolderBase]: 1649/2460 cut-off events. [2024-06-21 17:20:17,550 INFO L125 PetriNetUnfolderBase]: For 3519/3519 co-relation queries the response was YES. [2024-06-21 17:20:17,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 2460 events. 1649/2460 cut-off events. For 3519/3519 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11068 event pairs, 558 based on Foata normal form. 6/2466 useless extension candidates. Maximal degree in co-relation 7712. Up to 2373 conditions per place. [2024-06-21 17:20:17,563 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 73 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-06-21 17:20:17,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 92 transitions, 587 flow [2024-06-21 17:20:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:17,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 17:20:17,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49642857142857144 [2024-06-21 17:20:17,565 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 325 flow. Second operand 7 states and 139 transitions. [2024-06-21 17:20:17,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 92 transitions, 587 flow [2024-06-21 17:20:17,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 575 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-21 17:20:17,570 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 356 flow [2024-06-21 17:20:17,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=356, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-21 17:20:17,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 17:20:17,571 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 356 flow [2024-06-21 17:20:17,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:17,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:17,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:17,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:20:17,572 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 17:20:17,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:17,572 INFO L85 PathProgramCache]: Analyzing trace with hash 494709971, now seen corresponding path program 1 times [2024-06-21 17:20:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:17,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688038528] [2024-06-21 17:20:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688038528] [2024-06-21 17:20:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688038528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:18,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:18,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:20:18,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084816732] [2024-06-21 17:20:18,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:18,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:20:18,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:18,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:20:18,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:20:18,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:18,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:18,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:18,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:18,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:18,499 INFO L124 PetriNetUnfolderBase]: 1639/2447 cut-off events. [2024-06-21 17:20:18,499 INFO L125 PetriNetUnfolderBase]: For 4699/4701 co-relation queries the response was YES. [2024-06-21 17:20:18,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8162 conditions, 2447 events. 1639/2447 cut-off events. For 4699/4701 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11027 event pairs, 651 based on Foata normal form. 6/2453 useless extension candidates. Maximal degree in co-relation 8135. Up to 2407 conditions per place. [2024-06-21 17:20:18,516 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 61 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-21 17:20:18,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 542 flow [2024-06-21 17:20:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:20:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:20:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-21 17:20:18,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2024-06-21 17:20:18,517 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 356 flow. Second operand 5 states and 83 transitions. [2024-06-21 17:20:18,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 542 flow [2024-06-21 17:20:18,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 74 transitions, 507 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:18,523 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 369 flow [2024-06-21 17:20:18,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-21 17:20:18,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-21 17:20:18,524 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 369 flow [2024-06-21 17:20:18,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:18,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:18,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:18,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:20:18,524 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 17:20:18,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1174386298, now seen corresponding path program 1 times [2024-06-21 17:20:18,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:18,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616015829] [2024-06-21 17:20:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:18,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:19,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616015829] [2024-06-21 17:20:19,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616015829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:19,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:19,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:19,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473278318] [2024-06-21 17:20:19,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:19,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:19,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:19,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:19,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 369 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:19,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:19,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:19,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:19,664 INFO L124 PetriNetUnfolderBase]: 1689/2517 cut-off events. [2024-06-21 17:20:19,664 INFO L125 PetriNetUnfolderBase]: For 6225/6229 co-relation queries the response was YES. [2024-06-21 17:20:19,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 2517 events. 1689/2517 cut-off events. For 6225/6229 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11471 event pairs, 628 based on Foata normal form. 9/2526 useless extension candidates. Maximal degree in co-relation 8861. Up to 2356 conditions per place. [2024-06-21 17:20:19,678 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 77 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-21 17:20:19,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 104 transitions, 741 flow [2024-06-21 17:20:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:19,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 17:20:19,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-21 17:20:19,679 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 369 flow. Second operand 7 states and 129 transitions. [2024-06-21 17:20:19,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 104 transitions, 741 flow [2024-06-21 17:20:19,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 104 transitions, 717 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:19,685 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 444 flow [2024-06-21 17:20:19,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2024-06-21 17:20:19,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-21 17:20:19,686 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 444 flow [2024-06-21 17:20:19,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:19,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:19,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:19,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:20:19,687 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 17:20:19,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:19,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417574, now seen corresponding path program 2 times [2024-06-21 17:20:19,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:19,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248534030] [2024-06-21 17:20:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:19,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:20,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:20,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248534030] [2024-06-21 17:20:20,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248534030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:20,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:20,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:20,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940550967] [2024-06-21 17:20:20,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:20,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:20,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:20,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:20,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:20,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:20,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:20,964 INFO L124 PetriNetUnfolderBase]: 1741/2591 cut-off events. [2024-06-21 17:20:20,964 INFO L125 PetriNetUnfolderBase]: For 8531/8535 co-relation queries the response was YES. [2024-06-21 17:20:20,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9848 conditions, 2591 events. 1741/2591 cut-off events. For 8531/8535 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11811 event pairs, 646 based on Foata normal form. 9/2600 useless extension candidates. Maximal degree in co-relation 9818. Up to 2479 conditions per place. [2024-06-21 17:20:20,980 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 81 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-06-21 17:20:20,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 105 transitions, 792 flow [2024-06-21 17:20:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:20,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 17:20:20,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-21 17:20:20,982 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 444 flow. Second operand 7 states and 123 transitions. [2024-06-21 17:20:20,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 105 transitions, 792 flow [2024-06-21 17:20:20,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 761 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:20,990 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 515 flow [2024-06-21 17:20:20,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=515, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-21 17:20:20,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 17:20:20,992 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 515 flow [2024-06-21 17:20:20,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:20,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:20,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:20,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:20:20,993 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 17:20:20,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1502417388, now seen corresponding path program 1 times [2024-06-21 17:20:20,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:20,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727536557] [2024-06-21 17:20:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:21,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:21,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:21,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727536557] [2024-06-21 17:20:21,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727536557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:21,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:21,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039984255] [2024-06-21 17:20:21,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:21,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:21,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:21,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 515 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:21,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:21,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:21,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:22,149 INFO L124 PetriNetUnfolderBase]: 1763/2624 cut-off events. [2024-06-21 17:20:22,149 INFO L125 PetriNetUnfolderBase]: For 10371/10371 co-relation queries the response was YES. [2024-06-21 17:20:22,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10307 conditions, 2624 events. 1763/2624 cut-off events. For 10371/10371 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11928 event pairs, 616 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 10275. Up to 2498 conditions per place. [2024-06-21 17:20:22,161 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-21 17:20:22,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 112 transitions, 910 flow [2024-06-21 17:20:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:20:22,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 17:20:22,163 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 515 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:20:22,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 112 transitions, 910 flow [2024-06-21 17:20:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 851 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:22,176 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 608 flow [2024-06-21 17:20:22,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=608, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-06-21 17:20:22,177 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-21 17:20:22,177 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 608 flow [2024-06-21 17:20:22,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:22,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:22,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:22,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:20:22,178 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 17:20:22,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:22,178 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206030, now seen corresponding path program 2 times [2024-06-21 17:20:22,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:22,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5900800] [2024-06-21 17:20:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:22,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:22,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:22,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5900800] [2024-06-21 17:20:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5900800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:22,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:22,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163203895] [2024-06-21 17:20:22,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:22,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:22,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:22,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:22,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:22,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 608 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:22,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:22,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:22,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:23,226 INFO L124 PetriNetUnfolderBase]: 1785/2656 cut-off events. [2024-06-21 17:20:23,226 INFO L125 PetriNetUnfolderBase]: For 12814/12814 co-relation queries the response was YES. [2024-06-21 17:20:23,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11037 conditions, 2656 events. 1785/2656 cut-off events. For 12814/12814 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12027 event pairs, 614 based on Foata normal form. 4/2659 useless extension candidates. Maximal degree in co-relation 11002. Up to 2517 conditions per place. [2024-06-21 17:20:23,240 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 83 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-21 17:20:23,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 948 flow [2024-06-21 17:20:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 17:20:23,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-21 17:20:23,241 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 608 flow. Second operand 6 states and 107 transitions. [2024-06-21 17:20:23,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 948 flow [2024-06-21 17:20:23,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 914 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 17:20:23,253 INFO L231 Difference]: Finished difference. Result has 82 places, 88 transitions, 683 flow [2024-06-21 17:20:23,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=683, PETRI_PLACES=82, PETRI_TRANSITIONS=88} [2024-06-21 17:20:23,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-21 17:20:23,254 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 88 transitions, 683 flow [2024-06-21 17:20:23,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:23,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:23,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:23,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:20:23,255 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 17:20:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2105206216, now seen corresponding path program 3 times [2024-06-21 17:20:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:23,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884147430] [2024-06-21 17:20:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:23,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884147430] [2024-06-21 17:20:23,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884147430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:23,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:23,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:23,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604173453] [2024-06-21 17:20:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:23,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:23,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:23,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:23,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:23,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 88 transitions, 683 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:23,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:23,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:23,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:24,351 INFO L124 PetriNetUnfolderBase]: 1771/2636 cut-off events. [2024-06-21 17:20:24,351 INFO L125 PetriNetUnfolderBase]: For 14876/14878 co-relation queries the response was YES. [2024-06-21 17:20:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 2636 events. 1771/2636 cut-off events. For 14876/14878 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11957 event pairs, 640 based on Foata normal form. 7/2643 useless extension candidates. Maximal degree in co-relation 11286. Up to 2518 conditions per place. [2024-06-21 17:20:24,367 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 87 selfloop transitions, 25 changer transitions 0/115 dead transitions. [2024-06-21 17:20:24,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 115 transitions, 995 flow [2024-06-21 17:20:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:20:24,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:20:24,368 INFO L175 Difference]: Start difference. First operand has 82 places, 88 transitions, 683 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:20:24,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 115 transitions, 995 flow [2024-06-21 17:20:24,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 939 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:24,385 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 694 flow [2024-06-21 17:20:24,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=694, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-21 17:20:24,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 17:20:24,386 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 694 flow [2024-06-21 17:20:24,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:24,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:24,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:24,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:20:24,386 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 17:20:24,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:24,387 INFO L85 PathProgramCache]: Analyzing trace with hash -224945392, now seen corresponding path program 3 times [2024-06-21 17:20:24,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:24,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825655302] [2024-06-21 17:20:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:24,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:24,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:24,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825655302] [2024-06-21 17:20:24,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825655302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:24,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:24,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:20:24,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52106259] [2024-06-21 17:20:24,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:24,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:20:24,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:20:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:20:24,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:24,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 694 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:24,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:24,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:24,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:25,367 INFO L124 PetriNetUnfolderBase]: 1777/2646 cut-off events. [2024-06-21 17:20:25,367 INFO L125 PetriNetUnfolderBase]: For 14952/14954 co-relation queries the response was YES. [2024-06-21 17:20:25,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11364 conditions, 2646 events. 1777/2646 cut-off events. For 14952/14954 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 11997 event pairs, 622 based on Foata normal form. 6/2652 useless extension candidates. Maximal degree in co-relation 11326. Up to 2587 conditions per place. [2024-06-21 17:20:25,382 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 91 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-06-21 17:20:25,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 110 transitions, 994 flow [2024-06-21 17:20:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 17:20:25,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:20:25,384 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 694 flow. Second operand 6 states and 98 transitions. [2024-06-21 17:20:25,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 110 transitions, 994 flow [2024-06-21 17:20:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 933 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:25,398 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 731 flow [2024-06-21 17:20:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=731, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-21 17:20:25,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 45 predicate places. [2024-06-21 17:20:25,399 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 731 flow [2024-06-21 17:20:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:25,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:20:25,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:25,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2104959952, now seen corresponding path program 1 times [2024-06-21 17:20:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614610114] [2024-06-21 17:20:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:26,169 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 17:20:26,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:26,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614610114] [2024-06-21 17:20:26,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614610114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:26,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:26,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910802586] [2024-06-21 17:20:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:26,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:26,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:26,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:26,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:26,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 731 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:26,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:26,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:26,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:26,770 INFO L124 PetriNetUnfolderBase]: 1769/2633 cut-off events. [2024-06-21 17:20:26,770 INFO L125 PetriNetUnfolderBase]: For 16917/16921 co-relation queries the response was YES. [2024-06-21 17:20:26,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11590 conditions, 2633 events. 1769/2633 cut-off events. For 16917/16921 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11936 event pairs, 599 based on Foata normal form. 8/2641 useless extension candidates. Maximal degree in co-relation 11550. Up to 2575 conditions per place. [2024-06-21 17:20:26,788 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2024-06-21 17:20:26,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 112 transitions, 1007 flow [2024-06-21 17:20:26,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:26,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:26,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-21 17:20:26,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-21 17:20:26,789 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 731 flow. Second operand 6 states and 97 transitions. [2024-06-21 17:20:26,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 112 transitions, 1007 flow [2024-06-21 17:20:26,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 112 transitions, 983 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 17:20:26,808 INFO L231 Difference]: Finished difference. Result has 90 places, 96 transitions, 764 flow [2024-06-21 17:20:26,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=764, PETRI_PLACES=90, PETRI_TRANSITIONS=96} [2024-06-21 17:20:26,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 17:20:26,809 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 96 transitions, 764 flow [2024-06-21 17:20:26,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:26,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:26,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:26,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:20:26,809 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 17:20:26,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:26,810 INFO L85 PathProgramCache]: Analyzing trace with hash 665887493, now seen corresponding path program 1 times [2024-06-21 17:20:26,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:26,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057011774] [2024-06-21 17:20:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:26,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:27,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:27,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057011774] [2024-06-21 17:20:27,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057011774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:27,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361639192] [2024-06-21 17:20:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:27,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:27,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:27,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:27,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 96 transitions, 764 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:27,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:27,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:27,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:28,219 INFO L124 PetriNetUnfolderBase]: 1812/2696 cut-off events. [2024-06-21 17:20:28,219 INFO L125 PetriNetUnfolderBase]: For 20222/20224 co-relation queries the response was YES. [2024-06-21 17:20:28,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12225 conditions, 2696 events. 1812/2696 cut-off events. For 20222/20224 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12275 event pairs, 548 based on Foata normal form. 2/2698 useless extension candidates. Maximal degree in co-relation 12183. Up to 2366 conditions per place. [2024-06-21 17:20:28,236 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 104 selfloop transitions, 46 changer transitions 0/153 dead transitions. [2024-06-21 17:20:28,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 153 transitions, 1430 flow [2024-06-21 17:20:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:20:28,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 17:20:28,238 INFO L175 Difference]: Start difference. First operand has 90 places, 96 transitions, 764 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:20:28,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 153 transitions, 1430 flow [2024-06-21 17:20:28,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1391 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:28,256 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 957 flow [2024-06-21 17:20:28,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=957, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2024-06-21 17:20:28,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-21 17:20:28,256 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 957 flow [2024-06-21 17:20:28,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:28,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:28,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:28,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:20:28,257 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 17:20:28,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 665977703, now seen corresponding path program 2 times [2024-06-21 17:20:28,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:28,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460139656] [2024-06-21 17:20:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:28,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:29,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:29,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460139656] [2024-06-21 17:20:29,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460139656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:29,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:29,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:29,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588375739] [2024-06-21 17:20:29,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:29,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:29,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:29,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:29,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:29,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:29,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 957 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:29,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:29,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:29,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:29,605 INFO L124 PetriNetUnfolderBase]: 1838/2732 cut-off events. [2024-06-21 17:20:29,605 INFO L125 PetriNetUnfolderBase]: For 24805/24809 co-relation queries the response was YES. [2024-06-21 17:20:29,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13355 conditions, 2732 events. 1838/2732 cut-off events. For 24805/24809 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12395 event pairs, 582 based on Foata normal form. 9/2741 useless extension candidates. Maximal degree in co-relation 13311. Up to 2522 conditions per place. [2024-06-21 17:20:29,620 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 108 selfloop transitions, 44 changer transitions 0/155 dead transitions. [2024-06-21 17:20:29,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1460 flow [2024-06-21 17:20:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:20:29,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:20:29,621 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 957 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:20:29,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1460 flow [2024-06-21 17:20:29,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 155 transitions, 1376 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:29,645 INFO L231 Difference]: Finished difference. Result has 100 places, 116 transitions, 1057 flow [2024-06-21 17:20:29,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1057, PETRI_PLACES=100, PETRI_TRANSITIONS=116} [2024-06-21 17:20:29,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-21 17:20:29,646 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 116 transitions, 1057 flow [2024-06-21 17:20:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:29,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:29,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:20:29,646 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 17:20:29,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash 665977858, now seen corresponding path program 1 times [2024-06-21 17:20:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:29,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872143356] [2024-06-21 17:20:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:29,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:30,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:30,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872143356] [2024-06-21 17:20:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872143356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:30,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357993256] [2024-06-21 17:20:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:30,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:30,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 116 transitions, 1057 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:30,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:30,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:30,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:30,878 INFO L124 PetriNetUnfolderBase]: 1914/2843 cut-off events. [2024-06-21 17:20:30,878 INFO L125 PetriNetUnfolderBase]: For 28299/28301 co-relation queries the response was YES. [2024-06-21 17:20:30,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 2843 events. 1914/2843 cut-off events. For 28299/28301 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13006 event pairs, 521 based on Foata normal form. 8/2851 useless extension candidates. Maximal degree in co-relation 14611. Up to 2418 conditions per place. [2024-06-21 17:20:30,893 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 110 selfloop transitions, 58 changer transitions 0/171 dead transitions. [2024-06-21 17:20:30,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 171 transitions, 1814 flow [2024-06-21 17:20:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:20:30,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 17:20:30,895 INFO L175 Difference]: Start difference. First operand has 100 places, 116 transitions, 1057 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:20:30,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 171 transitions, 1814 flow [2024-06-21 17:20:30,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 171 transitions, 1699 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:30,923 INFO L231 Difference]: Finished difference. Result has 103 places, 130 transitions, 1236 flow [2024-06-21 17:20:30,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1236, PETRI_PLACES=103, PETRI_TRANSITIONS=130} [2024-06-21 17:20:30,924 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-21 17:20:30,925 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 130 transitions, 1236 flow [2024-06-21 17:20:30,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:30,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:30,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:30,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:20:30,926 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:30,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash -2042510754, now seen corresponding path program 2 times [2024-06-21 17:20:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:30,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460372823] [2024-06-21 17:20:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:30,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:31,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:31,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460372823] [2024-06-21 17:20:31,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460372823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:31,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:31,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:31,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677423420] [2024-06-21 17:20:31,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:31,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:31,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:31,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:31,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:31,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:31,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 130 transitions, 1236 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:31,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:31,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:31,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:32,362 INFO L124 PetriNetUnfolderBase]: 2048/3036 cut-off events. [2024-06-21 17:20:32,363 INFO L125 PetriNetUnfolderBase]: For 34406/34408 co-relation queries the response was YES. [2024-06-21 17:20:32,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16533 conditions, 3036 events. 2048/3036 cut-off events. For 34406/34408 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13983 event pairs, 569 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 16485. Up to 2761 conditions per place. [2024-06-21 17:20:32,382 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-21 17:20:32,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 190 transitions, 2078 flow [2024-06-21 17:20:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 17:20:32,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325 [2024-06-21 17:20:32,383 INFO L175 Difference]: Start difference. First operand has 103 places, 130 transitions, 1236 flow. Second operand 10 states and 173 transitions. [2024-06-21 17:20:32,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 190 transitions, 2078 flow [2024-06-21 17:20:32,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 190 transitions, 1997 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:32,426 INFO L231 Difference]: Finished difference. Result has 112 places, 145 transitions, 1462 flow [2024-06-21 17:20:32,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1462, PETRI_PLACES=112, PETRI_TRANSITIONS=145} [2024-06-21 17:20:32,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 17:20:32,427 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 145 transitions, 1462 flow [2024-06-21 17:20:32,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:32,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:32,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:32,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:20:32,427 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 17:20:32,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash 669696773, now seen corresponding path program 3 times [2024-06-21 17:20:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:32,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595135982] [2024-06-21 17:20:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:33,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:33,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595135982] [2024-06-21 17:20:33,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595135982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:33,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:33,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943116666] [2024-06-21 17:20:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:33,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:33,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:33,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 145 transitions, 1462 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:33,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:33,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:33,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:34,082 INFO L124 PetriNetUnfolderBase]: 2058/3049 cut-off events. [2024-06-21 17:20:34,082 INFO L125 PetriNetUnfolderBase]: For 38336/38340 co-relation queries the response was YES. [2024-06-21 17:20:34,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17143 conditions, 3049 events. 2058/3049 cut-off events. For 38336/38340 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13977 event pairs, 594 based on Foata normal form. 9/3058 useless extension candidates. Maximal degree in co-relation 17091. Up to 2917 conditions per place. [2024-06-21 17:20:34,102 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 148 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-21 17:20:34,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 2001 flow [2024-06-21 17:20:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 17:20:34,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:20:34,103 INFO L175 Difference]: Start difference. First operand has 112 places, 145 transitions, 1462 flow. Second operand 8 states and 140 transitions. [2024-06-21 17:20:34,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 2001 flow [2024-06-21 17:20:34,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 1937 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:34,144 INFO L231 Difference]: Finished difference. Result has 115 places, 151 transitions, 1562 flow [2024-06-21 17:20:34,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1401, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1562, PETRI_PLACES=115, PETRI_TRANSITIONS=151} [2024-06-21 17:20:34,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2024-06-21 17:20:34,145 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 151 transitions, 1562 flow [2024-06-21 17:20:34,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:34,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:34,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:34,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:20:34,146 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 17:20:34,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash 669696928, now seen corresponding path program 3 times [2024-06-21 17:20:34,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790087424] [2024-06-21 17:20:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:34,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:34,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:34,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790087424] [2024-06-21 17:20:34,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790087424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:34,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:34,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:34,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655245092] [2024-06-21 17:20:34,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:34,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:34,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:34,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:34,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 151 transitions, 1562 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:34,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:34,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:34,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:35,496 INFO L124 PetriNetUnfolderBase]: 2038/3022 cut-off events. [2024-06-21 17:20:35,496 INFO L125 PetriNetUnfolderBase]: For 41171/41173 co-relation queries the response was YES. [2024-06-21 17:20:35,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 3022 events. 2038/3022 cut-off events. For 41171/41173 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13858 event pairs, 560 based on Foata normal form. 8/3030 useless extension candidates. Maximal degree in co-relation 17538. Up to 2767 conditions per place. [2024-06-21 17:20:35,548 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 137 selfloop transitions, 45 changer transitions 0/185 dead transitions. [2024-06-21 17:20:35,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 185 transitions, 2152 flow [2024-06-21 17:20:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:20:35,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:20:35,549 INFO L175 Difference]: Start difference. First operand has 115 places, 151 transitions, 1562 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:20:35,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 185 transitions, 2152 flow [2024-06-21 17:20:35,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 185 transitions, 2027 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:35,589 INFO L231 Difference]: Finished difference. Result has 117 places, 151 transitions, 1539 flow [2024-06-21 17:20:35,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1539, PETRI_PLACES=117, PETRI_TRANSITIONS=151} [2024-06-21 17:20:35,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-21 17:20:35,590 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 151 transitions, 1539 flow [2024-06-21 17:20:35,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:35,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:35,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:35,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:20:35,590 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 17:20:35,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:35,590 INFO L85 PathProgramCache]: Analyzing trace with hash -829524560, now seen corresponding path program 4 times [2024-06-21 17:20:35,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:35,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002287413] [2024-06-21 17:20:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:35,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:36,135 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 17:20:36,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:36,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002287413] [2024-06-21 17:20:36,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002287413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:36,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:36,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:36,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783354155] [2024-06-21 17:20:36,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:36,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:36,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:36,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 151 transitions, 1539 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:36,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:36,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:36,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:36,856 INFO L124 PetriNetUnfolderBase]: 2060/3054 cut-off events. [2024-06-21 17:20:36,857 INFO L125 PetriNetUnfolderBase]: For 44748/44752 co-relation queries the response was YES. [2024-06-21 17:20:36,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17990 conditions, 3054 events. 2060/3054 cut-off events. For 44748/44752 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13977 event pairs, 592 based on Foata normal form. 8/3062 useless extension candidates. Maximal degree in co-relation 17935. Up to 2972 conditions per place. [2024-06-21 17:20:36,879 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 153 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2024-06-21 17:20:36,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 175 transitions, 1980 flow [2024-06-21 17:20:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:20:36,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:20:36,880 INFO L175 Difference]: Start difference. First operand has 117 places, 151 transitions, 1539 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:20:36,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 175 transitions, 1980 flow [2024-06-21 17:20:36,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 175 transitions, 1890 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 17:20:36,920 INFO L231 Difference]: Finished difference. Result has 117 places, 154 transitions, 1542 flow [2024-06-21 17:20:36,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1542, PETRI_PLACES=117, PETRI_TRANSITIONS=154} [2024-06-21 17:20:36,921 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-21 17:20:36,921 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 154 transitions, 1542 flow [2024-06-21 17:20:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:36,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:36,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:20:36,921 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 17:20:36,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash -836881945, now seen corresponding path program 4 times [2024-06-21 17:20:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:36,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672373776] [2024-06-21 17:20:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:37,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:37,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672373776] [2024-06-21 17:20:37,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672373776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:37,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597037034] [2024-06-21 17:20:37,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:37,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:37,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:37,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:37,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 154 transitions, 1542 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:37,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:37,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:37,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:38,427 INFO L124 PetriNetUnfolderBase]: 2085/3088 cut-off events. [2024-06-21 17:20:38,427 INFO L125 PetriNetUnfolderBase]: For 48905/48909 co-relation queries the response was YES. [2024-06-21 17:20:38,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18270 conditions, 3088 events. 2085/3088 cut-off events. For 48905/48909 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14176 event pairs, 591 based on Foata normal form. 12/3100 useless extension candidates. Maximal degree in co-relation 18214. Up to 2924 conditions per place. [2024-06-21 17:20:38,446 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 156 selfloop transitions, 37 changer transitions 0/196 dead transitions. [2024-06-21 17:20:38,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 196 transitions, 2139 flow [2024-06-21 17:20:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:38,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:20:38,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 17:20:38,447 INFO L175 Difference]: Start difference. First operand has 117 places, 154 transitions, 1542 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:20:38,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 196 transitions, 2139 flow [2024-06-21 17:20:38,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 196 transitions, 2083 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:38,498 INFO L231 Difference]: Finished difference. Result has 119 places, 161 transitions, 1677 flow [2024-06-21 17:20:38,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1677, PETRI_PLACES=119, PETRI_TRANSITIONS=161} [2024-06-21 17:20:38,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-21 17:20:38,498 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 161 transitions, 1677 flow [2024-06-21 17:20:38,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:38,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:38,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:38,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:20:38,499 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 17:20:38,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash -836881790, now seen corresponding path program 5 times [2024-06-21 17:20:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112845071] [2024-06-21 17:20:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:39,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:39,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112845071] [2024-06-21 17:20:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112845071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:39,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:39,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:39,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726794107] [2024-06-21 17:20:39,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:39,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:39,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:39,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:39,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 161 transitions, 1677 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:39,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:39,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:39,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:39,863 INFO L124 PetriNetUnfolderBase]: 2097/3107 cut-off events. [2024-06-21 17:20:39,863 INFO L125 PetriNetUnfolderBase]: For 53561/53563 co-relation queries the response was YES. [2024-06-21 17:20:39,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19185 conditions, 3107 events. 2097/3107 cut-off events. For 53561/53563 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14278 event pairs, 583 based on Foata normal form. 8/3115 useless extension candidates. Maximal degree in co-relation 19128. Up to 2799 conditions per place. [2024-06-21 17:20:39,886 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 148 selfloop transitions, 46 changer transitions 0/197 dead transitions. [2024-06-21 17:20:39,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2363 flow [2024-06-21 17:20:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 17:20:39,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-21 17:20:39,888 INFO L175 Difference]: Start difference. First operand has 119 places, 161 transitions, 1677 flow. Second operand 7 states and 131 transitions. [2024-06-21 17:20:39,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2363 flow [2024-06-21 17:20:39,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 2246 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:39,949 INFO L231 Difference]: Finished difference. Result has 122 places, 165 transitions, 1744 flow [2024-06-21 17:20:39,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=122, PETRI_TRANSITIONS=165} [2024-06-21 17:20:39,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 17:20:39,949 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 165 transitions, 1744 flow [2024-06-21 17:20:39,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:39,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:39,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:39,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:20:39,950 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:39,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash -829257433, now seen corresponding path program 1 times [2024-06-21 17:20:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:39,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096667468] [2024-06-21 17:20:39,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:40,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:40,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096667468] [2024-06-21 17:20:40,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096667468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:40,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:40,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:40,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021602589] [2024-06-21 17:20:40,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:40,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:40,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:40,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 165 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:40,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:40,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:40,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:41,360 INFO L124 PetriNetUnfolderBase]: 2092/3099 cut-off events. [2024-06-21 17:20:41,360 INFO L125 PetriNetUnfolderBase]: For 56468/56472 co-relation queries the response was YES. [2024-06-21 17:20:41,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19400 conditions, 3099 events. 2092/3099 cut-off events. For 56468/56472 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14244 event pairs, 577 based on Foata normal form. 6/3105 useless extension candidates. Maximal degree in co-relation 19341. Up to 3032 conditions per place. [2024-06-21 17:20:41,381 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 161 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-21 17:20:41,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 182 transitions, 2164 flow [2024-06-21 17:20:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:20:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:20:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 17:20:41,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:20:41,382 INFO L175 Difference]: Start difference. First operand has 122 places, 165 transitions, 1744 flow. Second operand 6 states and 98 transitions. [2024-06-21 17:20:41,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 182 transitions, 2164 flow [2024-06-21 17:20:41,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 182 transitions, 1991 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:20:41,442 INFO L231 Difference]: Finished difference. Result has 122 places, 166 transitions, 1641 flow [2024-06-21 17:20:41,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1641, PETRI_PLACES=122, PETRI_TRANSITIONS=166} [2024-06-21 17:20:41,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 17:20:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 166 transitions, 1641 flow [2024-06-21 17:20:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:41,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:41,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:41,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:20:41,443 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 17:20:41,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash -836876210, now seen corresponding path program 6 times [2024-06-21 17:20:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933703832] [2024-06-21 17:20:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933703832] [2024-06-21 17:20:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933703832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:42,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:42,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106837635] [2024-06-21 17:20:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:42,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:42,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:42,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:42,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 166 transitions, 1641 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:42,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:42,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:42,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:42,701 INFO L124 PetriNetUnfolderBase]: 2098/3109 cut-off events. [2024-06-21 17:20:42,701 INFO L125 PetriNetUnfolderBase]: For 59872/59874 co-relation queries the response was YES. [2024-06-21 17:20:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19317 conditions, 3109 events. 2098/3109 cut-off events. For 59872/59874 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14272 event pairs, 588 based on Foata normal form. 4/3113 useless extension candidates. Maximal degree in co-relation 19258. Up to 2802 conditions per place. [2024-06-21 17:20:42,724 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 146 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-06-21 17:20:42,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 196 transitions, 2238 flow [2024-06-21 17:20:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:20:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:20:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:20:42,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:20:42,739 INFO L175 Difference]: Start difference. First operand has 122 places, 166 transitions, 1641 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:20:42,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 196 transitions, 2238 flow [2024-06-21 17:20:42,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 196 transitions, 2196 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:42,790 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1758 flow [2024-06-21 17:20:42,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1758, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-06-21 17:20:42,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-21 17:20:42,791 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1758 flow [2024-06-21 17:20:42,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:42,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:42,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:42,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:20:42,791 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 17:20:42,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:42,792 INFO L85 PathProgramCache]: Analyzing trace with hash -832383305, now seen corresponding path program 1 times [2024-06-21 17:20:42,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:42,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159976887] [2024-06-21 17:20:42,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:42,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:43,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:43,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159976887] [2024-06-21 17:20:43,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159976887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:43,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:43,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:43,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387233234] [2024-06-21 17:20:43,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:43,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:43,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1758 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:43,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:43,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:43,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:44,714 INFO L124 PetriNetUnfolderBase]: 2380/3535 cut-off events. [2024-06-21 17:20:44,715 INFO L125 PetriNetUnfolderBase]: For 72618/72622 co-relation queries the response was YES. [2024-06-21 17:20:44,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22384 conditions, 3535 events. 2380/3535 cut-off events. For 72618/72622 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16832 event pairs, 458 based on Foata normal form. 22/3557 useless extension candidates. Maximal degree in co-relation 22324. Up to 2826 conditions per place. [2024-06-21 17:20:44,742 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 157 selfloop transitions, 77 changer transitions 0/237 dead transitions. [2024-06-21 17:20:44,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 237 transitions, 2732 flow [2024-06-21 17:20:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 17:20:44,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-06-21 17:20:44,744 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1758 flow. Second operand 9 states and 175 transitions. [2024-06-21 17:20:44,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 237 transitions, 2732 flow [2024-06-21 17:20:44,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 237 transitions, 2653 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:44,818 INFO L231 Difference]: Finished difference. Result has 133 places, 180 transitions, 2064 flow [2024-06-21 17:20:44,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2064, PETRI_PLACES=133, PETRI_TRANSITIONS=180} [2024-06-21 17:20:44,819 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 17:20:44,819 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 180 transitions, 2064 flow [2024-06-21 17:20:44,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:44,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:44,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:44,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:20:44,819 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 17:20:44,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash -832322855, now seen corresponding path program 2 times [2024-06-21 17:20:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:44,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192256067] [2024-06-21 17:20:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:44,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:45,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:45,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192256067] [2024-06-21 17:20:45,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192256067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:45,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:45,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:45,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460252700] [2024-06-21 17:20:45,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:45,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:45,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:45,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:45,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:45,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:45,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 180 transitions, 2064 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:45,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:45,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:45,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:46,675 INFO L124 PetriNetUnfolderBase]: 2440/3630 cut-off events. [2024-06-21 17:20:46,675 INFO L125 PetriNetUnfolderBase]: For 84231/84235 co-relation queries the response was YES. [2024-06-21 17:20:46,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24558 conditions, 3630 events. 2440/3630 cut-off events. For 84231/84235 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17428 event pairs, 651 based on Foata normal form. 25/3655 useless extension candidates. Maximal degree in co-relation 24495. Up to 3245 conditions per place. [2024-06-21 17:20:46,701 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 160 selfloop transitions, 75 changer transitions 0/238 dead transitions. [2024-06-21 17:20:46,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 238 transitions, 2806 flow [2024-06-21 17:20:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-21 17:20:46,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-21 17:20:46,702 INFO L175 Difference]: Start difference. First operand has 133 places, 180 transitions, 2064 flow. Second operand 10 states and 186 transitions. [2024-06-21 17:20:46,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 238 transitions, 2806 flow [2024-06-21 17:20:46,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 238 transitions, 2725 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 17:20:46,791 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 2222 flow [2024-06-21 17:20:46,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2222, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-21 17:20:46,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 17:20:46,791 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 2222 flow [2024-06-21 17:20:46,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:46,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:46,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:46,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:20:46,792 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 17:20:46,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:46,792 INFO L85 PathProgramCache]: Analyzing trace with hash -829521571, now seen corresponding path program 1 times [2024-06-21 17:20:46,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:46,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625435755] [2024-06-21 17:20:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:46,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:47,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:47,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625435755] [2024-06-21 17:20:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625435755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:47,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:47,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:47,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87936073] [2024-06-21 17:20:47,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:47,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:47,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:47,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:47,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 2222 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:47,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:47,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:47,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:48,370 INFO L124 PetriNetUnfolderBase]: 2430/3617 cut-off events. [2024-06-21 17:20:48,371 INFO L125 PetriNetUnfolderBase]: For 90098/90100 co-relation queries the response was YES. [2024-06-21 17:20:48,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25258 conditions, 3617 events. 2430/3617 cut-off events. For 90098/90100 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17416 event pairs, 613 based on Foata normal form. 4/3621 useless extension candidates. Maximal degree in co-relation 25192. Up to 3272 conditions per place. [2024-06-21 17:20:48,395 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 151 selfloop transitions, 64 changer transitions 0/218 dead transitions. [2024-06-21 17:20:48,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 218 transitions, 2844 flow [2024-06-21 17:20:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:20:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:20:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:20:48,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:20:48,396 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 2222 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:20:48,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 218 transitions, 2844 flow [2024-06-21 17:20:48,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 218 transitions, 2644 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 17:20:48,486 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 2162 flow [2024-06-21 17:20:48,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2162, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-21 17:20:48,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 17:20:48,486 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 2162 flow [2024-06-21 17:20:48,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:48,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:48,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:48,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:20:48,487 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 17:20:48,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:48,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1106684321, now seen corresponding path program 1 times [2024-06-21 17:20:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:48,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660682867] [2024-06-21 17:20:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:48,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:49,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:49,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660682867] [2024-06-21 17:20:49,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660682867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:49,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:49,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:49,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338273202] [2024-06-21 17:20:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:49,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:49,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:49,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:49,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 2162 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:49,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:49,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:49,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:50,220 INFO L124 PetriNetUnfolderBase]: 2492/3723 cut-off events. [2024-06-21 17:20:50,220 INFO L125 PetriNetUnfolderBase]: For 98640/98642 co-relation queries the response was YES. [2024-06-21 17:20:50,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26001 conditions, 3723 events. 2492/3723 cut-off events. For 98640/98642 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18133 event pairs, 1080 based on Foata normal form. 4/3727 useless extension candidates. Maximal degree in co-relation 25934. Up to 3559 conditions per place. [2024-06-21 17:20:50,249 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 35 changer transitions 0/222 dead transitions. [2024-06-21 17:20:50,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 222 transitions, 2851 flow [2024-06-21 17:20:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-21 17:20:50,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-21 17:20:50,250 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 2162 flow. Second operand 9 states and 139 transitions. [2024-06-21 17:20:50,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 222 transitions, 2851 flow [2024-06-21 17:20:50,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 222 transitions, 2717 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 17:20:50,358 INFO L231 Difference]: Finished difference. Result has 148 places, 196 transitions, 2339 flow [2024-06-21 17:20:50,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2044, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2339, PETRI_PLACES=148, PETRI_TRANSITIONS=196} [2024-06-21 17:20:50,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-21 17:20:50,359 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 196 transitions, 2339 flow [2024-06-21 17:20:50,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:50,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:50,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:50,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:20:50,360 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 17:20:50,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:50,360 INFO L85 PathProgramCache]: Analyzing trace with hash -151467589, now seen corresponding path program 2 times [2024-06-21 17:20:50,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:50,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643580758] [2024-06-21 17:20:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:51,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643580758] [2024-06-21 17:20:51,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643580758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:51,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:51,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:51,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433939543] [2024-06-21 17:20:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:51,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:51,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:51,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:51,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 196 transitions, 2339 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:51,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:51,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:51,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:52,103 INFO L124 PetriNetUnfolderBase]: 2725/4071 cut-off events. [2024-06-21 17:20:52,103 INFO L125 PetriNetUnfolderBase]: For 108659/108661 co-relation queries the response was YES. [2024-06-21 17:20:52,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28760 conditions, 4071 events. 2725/4071 cut-off events. For 108659/108661 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20156 event pairs, 957 based on Foata normal form. 4/4075 useless extension candidates. Maximal degree in co-relation 28688. Up to 3689 conditions per place. [2024-06-21 17:20:52,139 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 200 selfloop transitions, 84 changer transitions 0/287 dead transitions. [2024-06-21 17:20:52,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 287 transitions, 3836 flow [2024-06-21 17:20:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 17:20:52,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-21 17:20:52,141 INFO L175 Difference]: Start difference. First operand has 148 places, 196 transitions, 2339 flow. Second operand 10 states and 174 transitions. [2024-06-21 17:20:52,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 287 transitions, 3836 flow [2024-06-21 17:20:52,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 287 transitions, 3730 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:20:52,257 INFO L231 Difference]: Finished difference. Result has 159 places, 242 transitions, 3164 flow [2024-06-21 17:20:52,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3164, PETRI_PLACES=159, PETRI_TRANSITIONS=242} [2024-06-21 17:20:52,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 17:20:52,257 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 242 transitions, 3164 flow [2024-06-21 17:20:52,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:52,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:52,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:52,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:20:52,258 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:52,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:52,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2111582737, now seen corresponding path program 3 times [2024-06-21 17:20:52,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:52,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820204937] [2024-06-21 17:20:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:52,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:53,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:53,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820204937] [2024-06-21 17:20:53,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820204937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:53,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:53,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:53,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379500234] [2024-06-21 17:20:53,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:53,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:53,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:53,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:53,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:53,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:53,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 242 transitions, 3164 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:53,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:53,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:53,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:54,257 INFO L124 PetriNetUnfolderBase]: 2900/4321 cut-off events. [2024-06-21 17:20:54,257 INFO L125 PetriNetUnfolderBase]: For 123459/123463 co-relation queries the response was YES. [2024-06-21 17:20:54,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31128 conditions, 4321 events. 2900/4321 cut-off events. For 123459/123463 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 21521 event pairs, 956 based on Foata normal form. 22/4343 useless extension candidates. Maximal degree in co-relation 31050. Up to 4013 conditions per place. [2024-06-21 17:20:54,291 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 259 selfloop transitions, 63 changer transitions 0/325 dead transitions. [2024-06-21 17:20:54,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 325 transitions, 4425 flow [2024-06-21 17:20:54,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:20:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:20:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:20:54,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-21 17:20:54,292 INFO L175 Difference]: Start difference. First operand has 159 places, 242 transitions, 3164 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:20:54,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 325 transitions, 4425 flow [2024-06-21 17:20:54,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 325 transitions, 4392 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 17:20:54,454 INFO L231 Difference]: Finished difference. Result has 172 places, 276 transitions, 3714 flow [2024-06-21 17:20:54,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3131, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3714, PETRI_PLACES=172, PETRI_TRANSITIONS=276} [2024-06-21 17:20:54,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 17:20:54,455 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 276 transitions, 3714 flow [2024-06-21 17:20:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:54,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:54,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:20:54,455 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:54,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2111760491, now seen corresponding path program 3 times [2024-06-21 17:20:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722643603] [2024-06-21 17:20:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:55,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:55,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722643603] [2024-06-21 17:20:55,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722643603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:55,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:55,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517779166] [2024-06-21 17:20:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:55,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:55,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:55,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 276 transitions, 3714 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:55,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:55,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:55,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:56,391 INFO L124 PetriNetUnfolderBase]: 2890/4308 cut-off events. [2024-06-21 17:20:56,391 INFO L125 PetriNetUnfolderBase]: For 128155/128157 co-relation queries the response was YES. [2024-06-21 17:20:56,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32478 conditions, 4308 events. 2890/4308 cut-off events. For 128155/128157 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21506 event pairs, 963 based on Foata normal form. 4/4312 useless extension candidates. Maximal degree in co-relation 32393. Up to 3936 conditions per place. [2024-06-21 17:20:56,438 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 233 selfloop transitions, 88 changer transitions 0/324 dead transitions. [2024-06-21 17:20:56,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 324 transitions, 4513 flow [2024-06-21 17:20:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:20:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:20:56,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 17:20:56,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 17:20:56,439 INFO L175 Difference]: Start difference. First operand has 172 places, 276 transitions, 3714 flow. Second operand 12 states and 200 transitions. [2024-06-21 17:20:56,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 324 transitions, 4513 flow [2024-06-21 17:20:56,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 324 transitions, 4473 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-21 17:20:56,661 INFO L231 Difference]: Finished difference. Result has 184 places, 277 transitions, 3874 flow [2024-06-21 17:20:56,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3674, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3874, PETRI_PLACES=184, PETRI_TRANSITIONS=277} [2024-06-21 17:20:56,661 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 17:20:56,661 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 277 transitions, 3874 flow [2024-06-21 17:20:56,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:56,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:56,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:56,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:20:56,662 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:56,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:56,662 INFO L85 PathProgramCache]: Analyzing trace with hash 389855853, now seen corresponding path program 2 times [2024-06-21 17:20:56,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:56,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867454077] [2024-06-21 17:20:56,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:56,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:20:57,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:57,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867454077] [2024-06-21 17:20:57,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867454077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:57,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:57,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:20:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973705780] [2024-06-21 17:20:57,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:57,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:20:57,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:20:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:20:57,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:57,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 277 transitions, 3874 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:57,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:57,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:57,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:20:58,594 INFO L124 PetriNetUnfolderBase]: 2918/4352 cut-off events. [2024-06-21 17:20:58,594 INFO L125 PetriNetUnfolderBase]: For 136502/136504 co-relation queries the response was YES. [2024-06-21 17:20:58,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33221 conditions, 4352 events. 2918/4352 cut-off events. For 136502/136504 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 21822 event pairs, 964 based on Foata normal form. 4/4356 useless extension candidates. Maximal degree in co-relation 33132. Up to 4084 conditions per place. [2024-06-21 17:20:58,635 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 238 selfloop transitions, 72 changer transitions 0/313 dead transitions. [2024-06-21 17:20:58,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 313 transitions, 4630 flow [2024-06-21 17:20:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:20:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:20:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:20:58,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:20:58,637 INFO L175 Difference]: Start difference. First operand has 184 places, 277 transitions, 3874 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:20:58,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 313 transitions, 4630 flow [2024-06-21 17:20:58,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 313 transitions, 4443 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 17:20:58,841 INFO L231 Difference]: Finished difference. Result has 184 places, 281 transitions, 3887 flow [2024-06-21 17:20:58,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3887, PETRI_PLACES=184, PETRI_TRANSITIONS=281} [2024-06-21 17:20:58,842 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 17:20:58,842 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 281 transitions, 3887 flow [2024-06-21 17:20:58,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:58,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:20:58,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:20:58,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:20:58,843 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:20:58,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:20:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash -714230401, now seen corresponding path program 4 times [2024-06-21 17:20:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:20:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590290122] [2024-06-21 17:20:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:20:58,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:20:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:20:59,572 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 17:20:59,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:20:59,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590290122] [2024-06-21 17:20:59,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590290122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:20:59,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:20:59,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:20:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243182108] [2024-06-21 17:20:59,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:20:59,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:20:59,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:20:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:20:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:20:59,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:20:59,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 281 transitions, 3887 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:20:59,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:20:59,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:20:59,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:00,601 INFO L124 PetriNetUnfolderBase]: 2908/4340 cut-off events. [2024-06-21 17:21:00,601 INFO L125 PetriNetUnfolderBase]: For 141688/141690 co-relation queries the response was YES. [2024-06-21 17:21:00,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33351 conditions, 4340 events. 2908/4340 cut-off events. For 141688/141690 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 21771 event pairs, 965 based on Foata normal form. 4/4344 useless extension candidates. Maximal degree in co-relation 33261. Up to 3883 conditions per place. [2024-06-21 17:21:00,642 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 213 selfloop transitions, 95 changer transitions 0/311 dead transitions. [2024-06-21 17:21:00,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 311 transitions, 4613 flow [2024-06-21 17:21:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:21:00,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:21:00,643 INFO L175 Difference]: Start difference. First operand has 184 places, 281 transitions, 3887 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:21:00,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 311 transitions, 4613 flow [2024-06-21 17:21:00,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 311 transitions, 4429 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:00,854 INFO L231 Difference]: Finished difference. Result has 185 places, 281 transitions, 3922 flow [2024-06-21 17:21:00,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3922, PETRI_PLACES=185, PETRI_TRANSITIONS=281} [2024-06-21 17:21:00,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-21 17:21:00,855 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 281 transitions, 3922 flow [2024-06-21 17:21:00,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:00,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:00,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:00,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:21:00,855 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 17:21:00,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash -714235175, now seen corresponding path program 4 times [2024-06-21 17:21:00,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:00,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328238135] [2024-06-21 17:21:00,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:00,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:01,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:01,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328238135] [2024-06-21 17:21:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328238135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:01,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:01,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392917059] [2024-06-21 17:21:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:01,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:01,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:01,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 281 transitions, 3922 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:01,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:01,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:01,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:03,025 INFO L124 PetriNetUnfolderBase]: 2977/4446 cut-off events. [2024-06-21 17:21:03,025 INFO L125 PetriNetUnfolderBase]: For 158387/158391 co-relation queries the response was YES. [2024-06-21 17:21:03,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34488 conditions, 4446 events. 2977/4446 cut-off events. For 158387/158391 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 22423 event pairs, 1004 based on Foata normal form. 22/4468 useless extension candidates. Maximal degree in co-relation 34397. Up to 4012 conditions per place. [2024-06-21 17:21:03,069 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 245 selfloop transitions, 78 changer transitions 0/326 dead transitions. [2024-06-21 17:21:03,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 326 transitions, 4843 flow [2024-06-21 17:21:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:21:03,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:21:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:21:03,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:21:03,070 INFO L175 Difference]: Start difference. First operand has 185 places, 281 transitions, 3922 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:21:03,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 326 transitions, 4843 flow [2024-06-21 17:21:03,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 4668 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:03,385 INFO L231 Difference]: Finished difference. Result has 187 places, 284 transitions, 3986 flow [2024-06-21 17:21:03,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3749, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3986, PETRI_PLACES=187, PETRI_TRANSITIONS=284} [2024-06-21 17:21:03,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-21 17:21:03,386 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 284 transitions, 3986 flow [2024-06-21 17:21:03,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:03,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:03,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:21:03,386 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 17:21:03,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash -173535177, now seen corresponding path program 5 times [2024-06-21 17:21:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778567077] [2024-06-21 17:21:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:03,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:04,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:04,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778567077] [2024-06-21 17:21:04,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778567077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:04,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:04,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:04,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114958292] [2024-06-21 17:21:04,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:04,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:04,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:04,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:04,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:04,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:04,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 284 transitions, 3986 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:04,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:04,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:04,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:05,268 INFO L124 PetriNetUnfolderBase]: 3049/4568 cut-off events. [2024-06-21 17:21:05,268 INFO L125 PetriNetUnfolderBase]: For 142731/142743 co-relation queries the response was YES. [2024-06-21 17:21:05,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34305 conditions, 4568 events. 3049/4568 cut-off events. For 142731/142743 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23188 event pairs, 765 based on Foata normal form. 38/4606 useless extension candidates. Maximal degree in co-relation 34215. Up to 4026 conditions per place. [2024-06-21 17:21:05,311 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 251 selfloop transitions, 74 changer transitions 0/328 dead transitions. [2024-06-21 17:21:05,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 328 transitions, 4963 flow [2024-06-21 17:21:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:21:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:21:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 17:21:05,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-21 17:21:05,312 INFO L175 Difference]: Start difference. First operand has 187 places, 284 transitions, 3986 flow. Second operand 8 states and 153 transitions. [2024-06-21 17:21:05,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 328 transitions, 4963 flow [2024-06-21 17:21:05,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 328 transitions, 4785 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:05,546 INFO L231 Difference]: Finished difference. Result has 189 places, 286 transitions, 4043 flow [2024-06-21 17:21:05,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3814, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4043, PETRI_PLACES=189, PETRI_TRANSITIONS=286} [2024-06-21 17:21:05,547 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-21 17:21:05,547 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 286 transitions, 4043 flow [2024-06-21 17:21:05,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:05,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:05,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:05,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:21:05,548 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 17:21:05,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:05,548 INFO L85 PathProgramCache]: Analyzing trace with hash -173350479, now seen corresponding path program 3 times [2024-06-21 17:21:05,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:05,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337572486] [2024-06-21 17:21:05,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:05,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:06,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:06,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337572486] [2024-06-21 17:21:06,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337572486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:06,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:06,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:06,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509027027] [2024-06-21 17:21:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:06,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:06,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:06,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:06,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 286 transitions, 4043 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:06,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:06,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:06,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:07,399 INFO L124 PetriNetUnfolderBase]: 3066/4605 cut-off events. [2024-06-21 17:21:07,399 INFO L125 PetriNetUnfolderBase]: For 142848/142850 co-relation queries the response was YES. [2024-06-21 17:21:07,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34755 conditions, 4605 events. 3066/4605 cut-off events. For 142848/142850 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 23674 event pairs, 980 based on Foata normal form. 4/4609 useless extension candidates. Maximal degree in co-relation 34663. Up to 4294 conditions per place. [2024-06-21 17:21:07,444 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 234 selfloop transitions, 75 changer transitions 0/312 dead transitions. [2024-06-21 17:21:07,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 312 transitions, 4775 flow [2024-06-21 17:21:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:21:07,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:21:07,446 INFO L175 Difference]: Start difference. First operand has 189 places, 286 transitions, 4043 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:21:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 312 transitions, 4775 flow [2024-06-21 17:21:07,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 312 transitions, 4473 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:07,690 INFO L231 Difference]: Finished difference. Result has 189 places, 288 transitions, 3949 flow [2024-06-21 17:21:07,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3949, PETRI_PLACES=189, PETRI_TRANSITIONS=288} [2024-06-21 17:21:07,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-21 17:21:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 288 transitions, 3949 flow [2024-06-21 17:21:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:07,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:07,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:21:07,691 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 17:21:07,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 54550671, now seen corresponding path program 4 times [2024-06-21 17:21:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:07,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714221581] [2024-06-21 17:21:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:08,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:08,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714221581] [2024-06-21 17:21:08,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714221581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:08,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:08,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:08,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889249986] [2024-06-21 17:21:08,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:08,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:08,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:08,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:08,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:08,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:08,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 288 transitions, 3949 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:08,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:08,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:08,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:09,390 INFO L124 PetriNetUnfolderBase]: 3083/4629 cut-off events. [2024-06-21 17:21:09,390 INFO L125 PetriNetUnfolderBase]: For 147373/147377 co-relation queries the response was YES. [2024-06-21 17:21:09,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34682 conditions, 4629 events. 3083/4629 cut-off events. For 147373/147377 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23631 event pairs, 1149 based on Foata normal form. 8/4637 useless extension candidates. Maximal degree in co-relation 34590. Up to 4523 conditions per place. [2024-06-21 17:21:09,435 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-21 17:21:09,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 310 transitions, 4667 flow [2024-06-21 17:21:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:21:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:21:09,437 INFO L175 Difference]: Start difference. First operand has 189 places, 288 transitions, 3949 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:21:09,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 310 transitions, 4667 flow [2024-06-21 17:21:09,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 310 transitions, 4495 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:09,682 INFO L231 Difference]: Finished difference. Result has 191 places, 290 transitions, 3873 flow [2024-06-21 17:21:09,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3873, PETRI_PLACES=191, PETRI_TRANSITIONS=290} [2024-06-21 17:21:09,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 17:21:09,683 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 290 transitions, 3873 flow [2024-06-21 17:21:09,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:09,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:09,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:21:09,684 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:09,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:09,684 INFO L85 PathProgramCache]: Analyzing trace with hash 54781311, now seen corresponding path program 5 times [2024-06-21 17:21:09,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:09,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61719574] [2024-06-21 17:21:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:09,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:10,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:10,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61719574] [2024-06-21 17:21:10,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61719574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:10,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:10,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:10,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807172988] [2024-06-21 17:21:10,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:10,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:10,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:10,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:10,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 290 transitions, 3873 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:10,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:10,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:10,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:11,505 INFO L124 PetriNetUnfolderBase]: 3100/4655 cut-off events. [2024-06-21 17:21:11,505 INFO L125 PetriNetUnfolderBase]: For 146720/146724 co-relation queries the response was YES. [2024-06-21 17:21:11,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34581 conditions, 4655 events. 3100/4655 cut-off events. For 146720/146724 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23845 event pairs, 1135 based on Foata normal form. 8/4663 useless extension candidates. Maximal degree in co-relation 34488. Up to 4518 conditions per place. [2024-06-21 17:21:11,544 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 280 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-21 17:21:11,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 312 transitions, 4595 flow [2024-06-21 17:21:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 17:21:11,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:21:11,546 INFO L175 Difference]: Start difference. First operand has 191 places, 290 transitions, 3873 flow. Second operand 7 states and 112 transitions. [2024-06-21 17:21:11,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 312 transitions, 4595 flow [2024-06-21 17:21:11,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 312 transitions, 4523 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:11,765 INFO L231 Difference]: Finished difference. Result has 193 places, 292 transitions, 3915 flow [2024-06-21 17:21:11,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3801, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3915, PETRI_PLACES=193, PETRI_TRANSITIONS=292} [2024-06-21 17:21:11,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 17:21:11,766 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 292 transitions, 3915 flow [2024-06-21 17:21:11,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:11,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:11,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:11,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:21:11,766 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:11,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:11,767 INFO L85 PathProgramCache]: Analyzing trace with hash 63121551, now seen corresponding path program 6 times [2024-06-21 17:21:11,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:11,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826281217] [2024-06-21 17:21:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:11,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826281217] [2024-06-21 17:21:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826281217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:12,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:12,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:12,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438178382] [2024-06-21 17:21:12,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:12,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:12,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:12,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:12,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:12,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 292 transitions, 3915 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:12,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:12,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:12,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:13,395 INFO L124 PetriNetUnfolderBase]: 3092/4643 cut-off events. [2024-06-21 17:21:13,395 INFO L125 PetriNetUnfolderBase]: For 152336/152340 co-relation queries the response was YES. [2024-06-21 17:21:13,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34719 conditions, 4643 events. 3092/4643 cut-off events. For 152336/152340 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 23744 event pairs, 1118 based on Foata normal form. 8/4651 useless extension candidates. Maximal degree in co-relation 34625. Up to 4543 conditions per place. [2024-06-21 17:21:13,435 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 294 selfloop transitions, 17 changer transitions 0/314 dead transitions. [2024-06-21 17:21:13,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 314 transitions, 4639 flow [2024-06-21 17:21:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 17:21:13,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-21 17:21:13,436 INFO L175 Difference]: Start difference. First operand has 193 places, 292 transitions, 3915 flow. Second operand 7 states and 111 transitions. [2024-06-21 17:21:13,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 314 transitions, 4639 flow [2024-06-21 17:21:13,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 314 transitions, 4545 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:13,722 INFO L231 Difference]: Finished difference. Result has 195 places, 294 transitions, 3910 flow [2024-06-21 17:21:13,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3910, PETRI_PLACES=195, PETRI_TRANSITIONS=294} [2024-06-21 17:21:13,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-21 17:21:13,723 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 294 transitions, 3910 flow [2024-06-21 17:21:13,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:13,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:13,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:13,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:21:13,723 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:13,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:13,724 INFO L85 PathProgramCache]: Analyzing trace with hash 62824633, now seen corresponding path program 1 times [2024-06-21 17:21:13,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:13,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709946756] [2024-06-21 17:21:13,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:13,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:13,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:14,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:14,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709946756] [2024-06-21 17:21:14,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709946756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:14,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:14,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566826569] [2024-06-21 17:21:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:14,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:14,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:14,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:14,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:14,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 294 transitions, 3910 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:14,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:14,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:14,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:15,663 INFO L124 PetriNetUnfolderBase]: 3072/4603 cut-off events. [2024-06-21 17:21:15,663 INFO L125 PetriNetUnfolderBase]: For 149208/149212 co-relation queries the response was YES. [2024-06-21 17:21:15,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34284 conditions, 4603 events. 3072/4603 cut-off events. For 149208/149212 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23364 event pairs, 1144 based on Foata normal form. 6/4609 useless extension candidates. Maximal degree in co-relation 34189. Up to 4467 conditions per place. [2024-06-21 17:21:15,714 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 31 changer transitions 0/315 dead transitions. [2024-06-21 17:21:15,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 315 transitions, 4619 flow [2024-06-21 17:21:15,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:21:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:21:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 17:21:15,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-21 17:21:15,715 INFO L175 Difference]: Start difference. First operand has 195 places, 294 transitions, 3910 flow. Second operand 7 states and 113 transitions. [2024-06-21 17:21:15,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 315 transitions, 4619 flow [2024-06-21 17:21:16,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 315 transitions, 4536 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:16,010 INFO L231 Difference]: Finished difference. Result has 197 places, 295 transitions, 3924 flow [2024-06-21 17:21:16,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3924, PETRI_PLACES=197, PETRI_TRANSITIONS=295} [2024-06-21 17:21:16,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 17:21:16,011 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 295 transitions, 3924 flow [2024-06-21 17:21:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:16,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:16,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:16,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:21:16,011 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 17:21:16,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:16,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1912667077, now seen corresponding path program 1 times [2024-06-21 17:21:16,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:16,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602526360] [2024-06-21 17:21:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:16,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:16,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:16,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602526360] [2024-06-21 17:21:16,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602526360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:16,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:16,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:21:16,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232013029] [2024-06-21 17:21:16,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:16,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:21:16,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:16,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:21:16,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:21:16,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:21:16,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 295 transitions, 3924 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:16,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:16,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:21:16,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:17,404 INFO L124 PetriNetUnfolderBase]: 2903/4385 cut-off events. [2024-06-21 17:21:17,404 INFO L125 PetriNetUnfolderBase]: For 159352/159494 co-relation queries the response was YES. [2024-06-21 17:21:17,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33110 conditions, 4385 events. 2903/4385 cut-off events. For 159352/159494 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 22639 event pairs, 936 based on Foata normal form. 115/4460 useless extension candidates. Maximal degree in co-relation 33014. Up to 4114 conditions per place. [2024-06-21 17:21:17,448 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 246 selfloop transitions, 51 changer transitions 0/313 dead transitions. [2024-06-21 17:21:17,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 313 transitions, 4646 flow [2024-06-21 17:21:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:21:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:21:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-21 17:21:17,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-21 17:21:17,449 INFO L175 Difference]: Start difference. First operand has 197 places, 295 transitions, 3924 flow. Second operand 5 states and 93 transitions. [2024-06-21 17:21:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 313 transitions, 4646 flow [2024-06-21 17:21:17,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 313 transitions, 4562 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:17,668 INFO L231 Difference]: Finished difference. Result has 197 places, 298 transitions, 4049 flow [2024-06-21 17:21:17,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4049, PETRI_PLACES=197, PETRI_TRANSITIONS=298} [2024-06-21 17:21:17,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-21 17:21:17,669 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 298 transitions, 4049 flow [2024-06-21 17:21:17,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:17,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:17,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:21:17,669 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:17,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:17,669 INFO L85 PathProgramCache]: Analyzing trace with hash -661574543, now seen corresponding path program 1 times [2024-06-21 17:21:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569998766] [2024-06-21 17:21:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:18,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569998766] [2024-06-21 17:21:18,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569998766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:18,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:18,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:18,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150103063] [2024-06-21 17:21:18,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:18,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:18,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:18,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:18,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:18,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 298 transitions, 4049 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:18,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:18,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:18,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:19,486 INFO L124 PetriNetUnfolderBase]: 3744/5669 cut-off events. [2024-06-21 17:21:19,486 INFO L125 PetriNetUnfolderBase]: For 181965/181978 co-relation queries the response was YES. [2024-06-21 17:21:19,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41467 conditions, 5669 events. 3744/5669 cut-off events. For 181965/181978 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30786 event pairs, 849 based on Foata normal form. 26/5695 useless extension candidates. Maximal degree in co-relation 41370. Up to 3966 conditions per place. [2024-06-21 17:21:19,540 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 252 selfloop transitions, 198 changer transitions 0/453 dead transitions. [2024-06-21 17:21:19,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 453 transitions, 6595 flow [2024-06-21 17:21:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:19,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 17:21:19,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575 [2024-06-21 17:21:19,541 INFO L175 Difference]: Start difference. First operand has 197 places, 298 transitions, 4049 flow. Second operand 10 states and 183 transitions. [2024-06-21 17:21:19,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 453 transitions, 6595 flow [2024-06-21 17:21:19,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 453 transitions, 6508 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:19,806 INFO L231 Difference]: Finished difference. Result has 207 places, 373 transitions, 5422 flow [2024-06-21 17:21:19,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3970, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5422, PETRI_PLACES=207, PETRI_TRANSITIONS=373} [2024-06-21 17:21:19,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 166 predicate places. [2024-06-21 17:21:19,807 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 373 transitions, 5422 flow [2024-06-21 17:21:19,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:19,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:19,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:19,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:21:19,808 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:19,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:19,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1111556749, now seen corresponding path program 2 times [2024-06-21 17:21:19,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:19,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521629419] [2024-06-21 17:21:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:19,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:20,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:20,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521629419] [2024-06-21 17:21:20,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521629419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:20,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:20,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353662676] [2024-06-21 17:21:20,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:20,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:20,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:20,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 373 transitions, 5422 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:20,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:20,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:20,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:21,916 INFO L124 PetriNetUnfolderBase]: 3964/6022 cut-off events. [2024-06-21 17:21:21,916 INFO L125 PetriNetUnfolderBase]: For 196953/196970 co-relation queries the response was YES. [2024-06-21 17:21:21,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45262 conditions, 6022 events. 3964/6022 cut-off events. For 196953/196970 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33297 event pairs, 935 based on Foata normal form. 30/6052 useless extension candidates. Maximal degree in co-relation 45161. Up to 4511 conditions per place. [2024-06-21 17:21:21,975 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 261 selfloop transitions, 206 changer transitions 0/470 dead transitions. [2024-06-21 17:21:21,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 470 transitions, 7346 flow [2024-06-21 17:21:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:21,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 17:21:21,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 17:21:21,976 INFO L175 Difference]: Start difference. First operand has 207 places, 373 transitions, 5422 flow. Second operand 10 states and 184 transitions. [2024-06-21 17:21:21,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 470 transitions, 7346 flow [2024-06-21 17:21:22,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 470 transitions, 7233 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 17:21:22,315 INFO L231 Difference]: Finished difference. Result has 216 places, 392 transitions, 6107 flow [2024-06-21 17:21:22,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6107, PETRI_PLACES=216, PETRI_TRANSITIONS=392} [2024-06-21 17:21:22,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 17:21:22,316 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 392 transitions, 6107 flow [2024-06-21 17:21:22,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:22,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:22,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:22,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:21:22,316 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:22,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1081173649, now seen corresponding path program 3 times [2024-06-21 17:21:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:22,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223840734] [2024-06-21 17:21:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:22,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:22,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223840734] [2024-06-21 17:21:22,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223840734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:22,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:22,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184347274] [2024-06-21 17:21:22,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:22,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:22,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:22,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 392 transitions, 6107 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:22,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:22,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:22,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:24,382 INFO L124 PetriNetUnfolderBase]: 4031/6135 cut-off events. [2024-06-21 17:21:24,382 INFO L125 PetriNetUnfolderBase]: For 213575/213592 co-relation queries the response was YES. [2024-06-21 17:21:24,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47000 conditions, 6135 events. 4031/6135 cut-off events. For 213575/213592 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 34193 event pairs, 974 based on Foata normal form. 38/6173 useless extension candidates. Maximal degree in co-relation 46895. Up to 4820 conditions per place. [2024-06-21 17:21:24,447 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 255 selfloop transitions, 208 changer transitions 0/466 dead transitions. [2024-06-21 17:21:24,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 466 transitions, 7609 flow [2024-06-21 17:21:24,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 17:21:24,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-21 17:21:24,448 INFO L175 Difference]: Start difference. First operand has 216 places, 392 transitions, 6107 flow. Second operand 10 states and 181 transitions. [2024-06-21 17:21:24,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 466 transitions, 7609 flow [2024-06-21 17:21:24,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 466 transitions, 7367 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:24,855 INFO L231 Difference]: Finished difference. Result has 223 places, 398 transitions, 6411 flow [2024-06-21 17:21:24,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6411, PETRI_PLACES=223, PETRI_TRANSITIONS=398} [2024-06-21 17:21:24,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-21 17:21:24,855 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 398 transitions, 6411 flow [2024-06-21 17:21:24,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:24,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:24,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:21:24,856 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 17:21:24,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:24,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1572215825, now seen corresponding path program 4 times [2024-06-21 17:21:24,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:24,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618704607] [2024-06-21 17:21:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:25,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:25,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618704607] [2024-06-21 17:21:25,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618704607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:25,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:25,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:25,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026613143] [2024-06-21 17:21:25,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:25,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:25,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:25,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:25,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 398 transitions, 6411 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:25,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:25,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:25,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:27,244 INFO L124 PetriNetUnfolderBase]: 4692/7241 cut-off events. [2024-06-21 17:21:27,244 INFO L125 PetriNetUnfolderBase]: For 255935/255952 co-relation queries the response was YES. [2024-06-21 17:21:27,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55902 conditions, 7241 events. 4692/7241 cut-off events. For 255935/255952 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42691 event pairs, 901 based on Foata normal form. 30/7271 useless extension candidates. Maximal degree in co-relation 55793. Up to 3769 conditions per place. [2024-06-21 17:21:27,331 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 244 selfloop transitions, 244 changer transitions 0/491 dead transitions. [2024-06-21 17:21:27,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 491 transitions, 8483 flow [2024-06-21 17:21:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:21:27,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 17:21:27,336 INFO L175 Difference]: Start difference. First operand has 223 places, 398 transitions, 6411 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:21:27,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 491 transitions, 8483 flow [2024-06-21 17:21:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 491 transitions, 8104 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:27,919 INFO L231 Difference]: Finished difference. Result has 230 places, 423 transitions, 7078 flow [2024-06-21 17:21:27,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7078, PETRI_PLACES=230, PETRI_TRANSITIONS=423} [2024-06-21 17:21:27,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 17:21:27,919 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 423 transitions, 7078 flow [2024-06-21 17:21:27,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:27,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:27,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:27,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:21:27,920 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 17:21:27,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:27,920 INFO L85 PathProgramCache]: Analyzing trace with hash 896791535, now seen corresponding path program 5 times [2024-06-21 17:21:27,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:27,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487671090] [2024-06-21 17:21:27,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:27,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:28,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:28,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487671090] [2024-06-21 17:21:28,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487671090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:28,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:28,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:21:28,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396697076] [2024-06-21 17:21:28,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:28,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:21:28,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:21:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:21:28,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:28,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 423 transitions, 7078 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:28,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:28,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:28,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:30,639 INFO L124 PetriNetUnfolderBase]: 4734/7326 cut-off events. [2024-06-21 17:21:30,640 INFO L125 PetriNetUnfolderBase]: For 276179/276196 co-relation queries the response was YES. [2024-06-21 17:21:30,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57218 conditions, 7326 events. 4734/7326 cut-off events. For 276179/276196 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43644 event pairs, 1340 based on Foata normal form. 44/7370 useless extension candidates. Maximal degree in co-relation 57105. Up to 5712 conditions per place. [2024-06-21 17:21:30,740 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 283 selfloop transitions, 211 changer transitions 0/497 dead transitions. [2024-06-21 17:21:30,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 497 transitions, 8664 flow [2024-06-21 17:21:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 194 transitions. [2024-06-21 17:21:30,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-21 17:21:30,741 INFO L175 Difference]: Start difference. First operand has 230 places, 423 transitions, 7078 flow. Second operand 11 states and 194 transitions. [2024-06-21 17:21:30,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 497 transitions, 8664 flow [2024-06-21 17:21:31,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 497 transitions, 8381 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:31,326 INFO L231 Difference]: Finished difference. Result has 236 places, 425 transitions, 7309 flow [2024-06-21 17:21:31,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6799, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7309, PETRI_PLACES=236, PETRI_TRANSITIONS=425} [2024-06-21 17:21:31,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-21 17:21:31,327 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 425 transitions, 7309 flow [2024-06-21 17:21:31,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:31,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:31,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:31,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:21:31,327 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 17:21:31,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1666932139, now seen corresponding path program 6 times [2024-06-21 17:21:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:31,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229865980] [2024-06-21 17:21:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:31,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:31,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:31,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229865980] [2024-06-21 17:21:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229865980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:31,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:31,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953989566] [2024-06-21 17:21:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:31,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:32,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:32,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 425 transitions, 7309 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:32,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:32,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:32,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:34,284 INFO L124 PetriNetUnfolderBase]: 6040/9334 cut-off events. [2024-06-21 17:21:34,284 INFO L125 PetriNetUnfolderBase]: For 340376/340393 co-relation queries the response was YES. [2024-06-21 17:21:34,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74232 conditions, 9334 events. 6040/9334 cut-off events. For 340376/340393 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57829 event pairs, 1487 based on Foata normal form. 38/9372 useless extension candidates. Maximal degree in co-relation 74118. Up to 6380 conditions per place. [2024-06-21 17:21:34,414 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 324 selfloop transitions, 304 changer transitions 0/631 dead transitions. [2024-06-21 17:21:34,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 631 transitions, 11718 flow [2024-06-21 17:21:34,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:34,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:34,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-21 17:21:34,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-06-21 17:21:34,415 INFO L175 Difference]: Start difference. First operand has 236 places, 425 transitions, 7309 flow. Second operand 10 states and 184 transitions. [2024-06-21 17:21:34,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 631 transitions, 11718 flow [2024-06-21 17:21:35,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 631 transitions, 11225 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 17:21:35,309 INFO L231 Difference]: Finished difference. Result has 242 places, 532 transitions, 9727 flow [2024-06-21 17:21:35,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9727, PETRI_PLACES=242, PETRI_TRANSITIONS=532} [2024-06-21 17:21:35,309 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 17:21:35,309 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 532 transitions, 9727 flow [2024-06-21 17:21:35,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:35,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:35,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:35,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:21:35,310 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 17:21:35,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:35,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1668806089, now seen corresponding path program 7 times [2024-06-21 17:21:35,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:35,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593926923] [2024-06-21 17:21:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:35,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:35,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:35,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593926923] [2024-06-21 17:21:35,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593926923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:35,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:35,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:35,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905527487] [2024-06-21 17:21:35,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:35,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:35,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:35,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:35,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 532 transitions, 9727 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:35,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:35,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:35,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:38,631 INFO L124 PetriNetUnfolderBase]: 6486/10065 cut-off events. [2024-06-21 17:21:38,631 INFO L125 PetriNetUnfolderBase]: For 413797/413814 co-relation queries the response was YES. [2024-06-21 17:21:38,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82134 conditions, 10065 events. 6486/10065 cut-off events. For 413797/413814 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 63672 event pairs, 1649 based on Foata normal form. 46/10111 useless extension candidates. Maximal degree in co-relation 82016. Up to 7553 conditions per place. [2024-06-21 17:21:38,756 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 340 selfloop transitions, 290 changer transitions 0/633 dead transitions. [2024-06-21 17:21:38,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 633 transitions, 12207 flow [2024-06-21 17:21:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:38,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 17:21:38,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-21 17:21:38,757 INFO L175 Difference]: Start difference. First operand has 242 places, 532 transitions, 9727 flow. Second operand 10 states and 185 transitions. [2024-06-21 17:21:38,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 633 transitions, 12207 flow [2024-06-21 17:21:39,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 633 transitions, 12144 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 17:21:39,697 INFO L231 Difference]: Finished difference. Result has 252 places, 544 transitions, 10721 flow [2024-06-21 17:21:39,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9664, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10721, PETRI_PLACES=252, PETRI_TRANSITIONS=544} [2024-06-21 17:21:39,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-21 17:21:39,698 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 544 transitions, 10721 flow [2024-06-21 17:21:39,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:39,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:39,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:39,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:21:39,698 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 17:21:39,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:39,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1668809809, now seen corresponding path program 8 times [2024-06-21 17:21:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:39,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572715599] [2024-06-21 17:21:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:39,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:40,306 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 17:21:40,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:40,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572715599] [2024-06-21 17:21:40,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572715599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:40,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:40,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:21:40,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6997539] [2024-06-21 17:21:40,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:40,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:21:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:40,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:21:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:21:40,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:40,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 544 transitions, 10721 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:40,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:40,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:40,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:42,973 INFO L124 PetriNetUnfolderBase]: 6641/10335 cut-off events. [2024-06-21 17:21:42,973 INFO L125 PetriNetUnfolderBase]: For 454861/454878 co-relation queries the response was YES. [2024-06-21 17:21:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85826 conditions, 10335 events. 6641/10335 cut-off events. For 454861/454878 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 66126 event pairs, 1802 based on Foata normal form. 62/10397 useless extension candidates. Maximal degree in co-relation 85704. Up to 8392 conditions per place. [2024-06-21 17:21:43,087 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 340 selfloop transitions, 288 changer transitions 0/631 dead transitions. [2024-06-21 17:21:43,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 631 transitions, 12807 flow [2024-06-21 17:21:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 17:21:43,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 17:21:43,088 INFO L175 Difference]: Start difference. First operand has 252 places, 544 transitions, 10721 flow. Second operand 10 states and 182 transitions. [2024-06-21 17:21:43,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 631 transitions, 12807 flow [2024-06-21 17:21:44,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 631 transitions, 12472 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:21:44,026 INFO L231 Difference]: Finished difference. Result has 259 places, 557 transitions, 11310 flow [2024-06-21 17:21:44,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11310, PETRI_PLACES=259, PETRI_TRANSITIONS=557} [2024-06-21 17:21:44,027 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-21 17:21:44,027 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 557 transitions, 11310 flow [2024-06-21 17:21:44,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:44,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:44,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:44,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:21:44,027 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 17:21:44,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:44,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1755645769, now seen corresponding path program 9 times [2024-06-21 17:21:44,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351615422] [2024-06-21 17:21:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:45,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351615422] [2024-06-21 17:21:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351615422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:45,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:45,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:21:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019058973] [2024-06-21 17:21:45,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:21:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:21:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:21:45,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:45,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 557 transitions, 11310 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:45,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:45,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:45,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:48,261 INFO L124 PetriNetUnfolderBase]: 6700/10444 cut-off events. [2024-06-21 17:21:48,261 INFO L125 PetriNetUnfolderBase]: For 454200/454217 co-relation queries the response was YES. [2024-06-21 17:21:48,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87912 conditions, 10444 events. 6700/10444 cut-off events. For 454200/454217 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 67112 event pairs, 1814 based on Foata normal form. 54/10498 useless extension candidates. Maximal degree in co-relation 87786. Up to 8186 conditions per place. [2024-06-21 17:21:48,381 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 343 selfloop transitions, 292 changer transitions 0/638 dead transitions. [2024-06-21 17:21:48,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 638 transitions, 13306 flow [2024-06-21 17:21:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:21:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:21:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 17:21:48,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 17:21:48,383 INFO L175 Difference]: Start difference. First operand has 259 places, 557 transitions, 11310 flow. Second operand 11 states and 195 transitions. [2024-06-21 17:21:48,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 638 transitions, 13306 flow [2024-06-21 17:21:49,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 638 transitions, 12797 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:49,516 INFO L231 Difference]: Finished difference. Result has 264 places, 560 transitions, 11534 flow [2024-06-21 17:21:49,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10801, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11534, PETRI_PLACES=264, PETRI_TRANSITIONS=560} [2024-06-21 17:21:49,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-21 17:21:49,517 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 560 transitions, 11534 flow [2024-06-21 17:21:49,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:49,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:49,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:49,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:21:49,518 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 17:21:49,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash -400520669, now seen corresponding path program 1 times [2024-06-21 17:21:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:49,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089335390] [2024-06-21 17:21:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:50,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:50,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089335390] [2024-06-21 17:21:50,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089335390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:50,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:50,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:21:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97447315] [2024-06-21 17:21:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:21:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:21:50,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:21:50,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:50,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 560 transitions, 11534 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:50,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:50,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:50,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:53,093 INFO L124 PetriNetUnfolderBase]: 6912/10789 cut-off events. [2024-06-21 17:21:53,093 INFO L125 PetriNetUnfolderBase]: For 483492/483497 co-relation queries the response was YES. [2024-06-21 17:21:53,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90605 conditions, 10789 events. 6912/10789 cut-off events. For 483492/483497 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 70171 event pairs, 2541 based on Foata normal form. 50/10839 useless extension candidates. Maximal degree in co-relation 90478. Up to 9957 conditions per place. [2024-06-21 17:21:53,242 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 498 selfloop transitions, 105 changer transitions 0/606 dead transitions. [2024-06-21 17:21:53,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 606 transitions, 13031 flow [2024-06-21 17:21:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:21:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:21:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 17:21:53,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:21:53,244 INFO L175 Difference]: Start difference. First operand has 264 places, 560 transitions, 11534 flow. Second operand 10 states and 175 transitions. [2024-06-21 17:21:53,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 606 transitions, 13031 flow [2024-06-21 17:21:54,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 606 transitions, 12537 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:54,611 INFO L231 Difference]: Finished difference. Result has 268 places, 564 transitions, 11389 flow [2024-06-21 17:21:54,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11040, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11389, PETRI_PLACES=268, PETRI_TRANSITIONS=564} [2024-06-21 17:21:54,611 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-21 17:21:54,611 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 564 transitions, 11389 flow [2024-06-21 17:21:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:54,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:54,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:21:54,612 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:54,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash 468080573, now seen corresponding path program 2 times [2024-06-21 17:21:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:54,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868521433] [2024-06-21 17:21:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:21:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:21:55,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:21:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868521433] [2024-06-21 17:21:55,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868521433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:21:55,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:21:55,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:21:55,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746277152] [2024-06-21 17:21:55,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:21:55,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:21:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:21:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:21:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:21:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:21:55,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 564 transitions, 11389 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:55,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:21:55,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:21:55,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:21:58,465 INFO L124 PetriNetUnfolderBase]: 6910/10784 cut-off events. [2024-06-21 17:21:58,465 INFO L125 PetriNetUnfolderBase]: For 454519/454524 co-relation queries the response was YES. [2024-06-21 17:21:58,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89943 conditions, 10784 events. 6910/10784 cut-off events. For 454519/454524 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 70109 event pairs, 2601 based on Foata normal form. 10/10794 useless extension candidates. Maximal degree in co-relation 89815. Up to 10202 conditions per place. [2024-06-21 17:21:58,601 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 504 selfloop transitions, 108 changer transitions 0/615 dead transitions. [2024-06-21 17:21:58,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 615 transitions, 12920 flow [2024-06-21 17:21:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:21:58,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:21:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-21 17:21:58,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41458333333333336 [2024-06-21 17:21:58,602 INFO L175 Difference]: Start difference. First operand has 268 places, 564 transitions, 11389 flow. Second operand 12 states and 199 transitions. [2024-06-21 17:21:58,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 615 transitions, 12920 flow [2024-06-21 17:21:59,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 615 transitions, 12712 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:21:59,967 INFO L231 Difference]: Finished difference. Result has 274 places, 568 transitions, 11540 flow [2024-06-21 17:21:59,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11181, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11540, PETRI_PLACES=274, PETRI_TRANSITIONS=568} [2024-06-21 17:21:59,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 17:21:59,968 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 568 transitions, 11540 flow [2024-06-21 17:21:59,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:21:59,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:21:59,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:21:59,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:21:59,969 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:21:59,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:21:59,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1040282325, now seen corresponding path program 3 times [2024-06-21 17:21:59,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:21:59,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294931846] [2024-06-21 17:21:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:21:59,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:21:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:00,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:00,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294931846] [2024-06-21 17:22:00,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294931846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:00,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:00,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:00,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374555441] [2024-06-21 17:22:00,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:00,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:00,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:00,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:00,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 568 transitions, 11540 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:00,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:00,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:00,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:04,230 INFO L124 PetriNetUnfolderBase]: 6927/10809 cut-off events. [2024-06-21 17:22:04,231 INFO L125 PetriNetUnfolderBase]: For 462402/462407 co-relation queries the response was YES. [2024-06-21 17:22:04,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90100 conditions, 10809 events. 6927/10809 cut-off events. For 462402/462407 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 70284 event pairs, 2528 based on Foata normal form. 6/10815 useless extension candidates. Maximal degree in co-relation 89971. Up to 9890 conditions per place. [2024-06-21 17:22:04,377 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 501 selfloop transitions, 118 changer transitions 0/622 dead transitions. [2024-06-21 17:22:04,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 622 transitions, 13038 flow [2024-06-21 17:22:04,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:22:04,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:22:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-21 17:22:04,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42291666666666666 [2024-06-21 17:22:04,378 INFO L175 Difference]: Start difference. First operand has 274 places, 568 transitions, 11540 flow. Second operand 12 states and 203 transitions. [2024-06-21 17:22:04,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 622 transitions, 13038 flow [2024-06-21 17:22:05,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 622 transitions, 12736 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:05,725 INFO L231 Difference]: Finished difference. Result has 276 places, 570 transitions, 11530 flow [2024-06-21 17:22:05,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11238, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11530, PETRI_PLACES=276, PETRI_TRANSITIONS=570} [2024-06-21 17:22:05,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-21 17:22:05,725 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 570 transitions, 11530 flow [2024-06-21 17:22:05,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:05,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:05,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:05,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:22:05,726 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 17:22:05,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:05,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1040067123, now seen corresponding path program 10 times [2024-06-21 17:22:05,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:05,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282363648] [2024-06-21 17:22:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:05,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:06,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282363648] [2024-06-21 17:22:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282363648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:06,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:06,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693360343] [2024-06-21 17:22:06,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:06,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:06,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:06,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:06,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 570 transitions, 11530 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:06,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:06,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:06,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:09,597 INFO L124 PetriNetUnfolderBase]: 7100/11094 cut-off events. [2024-06-21 17:22:09,597 INFO L125 PetriNetUnfolderBase]: For 519606/519611 co-relation queries the response was YES. [2024-06-21 17:22:09,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92579 conditions, 11094 events. 7100/11094 cut-off events. For 519606/519611 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 72746 event pairs, 2646 based on Foata normal form. 42/11136 useless extension candidates. Maximal degree in co-relation 92449. Up to 10265 conditions per place. [2024-06-21 17:22:09,754 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 515 selfloop transitions, 111 changer transitions 0/629 dead transitions. [2024-06-21 17:22:09,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 629 transitions, 13133 flow [2024-06-21 17:22:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 17:22:09,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 17:22:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-06-21 17:22:09,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41923076923076924 [2024-06-21 17:22:09,755 INFO L175 Difference]: Start difference. First operand has 276 places, 570 transitions, 11530 flow. Second operand 13 states and 218 transitions. [2024-06-21 17:22:09,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 629 transitions, 13133 flow [2024-06-21 17:22:11,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 629 transitions, 12861 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:11,195 INFO L231 Difference]: Finished difference. Result has 279 places, 573 transitions, 11620 flow [2024-06-21 17:22:11,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11258, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11620, PETRI_PLACES=279, PETRI_TRANSITIONS=573} [2024-06-21 17:22:11,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-21 17:22:11,196 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 573 transitions, 11620 flow [2024-06-21 17:22:11,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:11,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:11,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:11,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:22:11,196 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 17:22:11,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:11,197 INFO L85 PathProgramCache]: Analyzing trace with hash -805094617, now seen corresponding path program 11 times [2024-06-21 17:22:11,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:11,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910018482] [2024-06-21 17:22:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:11,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:11,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:11,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910018482] [2024-06-21 17:22:11,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910018482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:11,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:11,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:11,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885671369] [2024-06-21 17:22:11,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:11,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:11,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:11,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:11,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:11,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:11,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 573 transitions, 11620 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:11,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:11,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:11,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:14,675 INFO L124 PetriNetUnfolderBase]: 7306/11429 cut-off events. [2024-06-21 17:22:14,676 INFO L125 PetriNetUnfolderBase]: For 551117/551122 co-relation queries the response was YES. [2024-06-21 17:22:14,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95945 conditions, 11429 events. 7306/11429 cut-off events. For 551117/551122 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 75264 event pairs, 2607 based on Foata normal form. 34/11463 useless extension candidates. Maximal degree in co-relation 95814. Up to 9703 conditions per place. [2024-06-21 17:22:14,835 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 505 selfloop transitions, 117 changer transitions 0/625 dead transitions. [2024-06-21 17:22:14,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 625 transitions, 13419 flow [2024-06-21 17:22:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 17:22:14,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-21 17:22:14,836 INFO L175 Difference]: Start difference. First operand has 279 places, 573 transitions, 11620 flow. Second operand 10 states and 178 transitions. [2024-06-21 17:22:14,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 625 transitions, 13419 flow [2024-06-21 17:22:16,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 625 transitions, 13162 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 17:22:16,497 INFO L231 Difference]: Finished difference. Result has 280 places, 578 transitions, 11830 flow [2024-06-21 17:22:16,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11363, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11830, PETRI_PLACES=280, PETRI_TRANSITIONS=578} [2024-06-21 17:22:16,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 17:22:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 578 transitions, 11830 flow [2024-06-21 17:22:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:16,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:22:16,499 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 17:22:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -804946747, now seen corresponding path program 12 times [2024-06-21 17:22:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:16,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069064587] [2024-06-21 17:22:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069064587] [2024-06-21 17:22:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069064587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:17,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:17,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:17,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878669639] [2024-06-21 17:22:17,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:17,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:17,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:17,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 578 transitions, 11830 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:17,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:17,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:17,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:20,463 INFO L124 PetriNetUnfolderBase]: 7365/11551 cut-off events. [2024-06-21 17:22:20,463 INFO L125 PetriNetUnfolderBase]: For 566065/566070 co-relation queries the response was YES. [2024-06-21 17:22:20,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96504 conditions, 11551 events. 7365/11551 cut-off events. For 566065/566070 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 76745 event pairs, 2722 based on Foata normal form. 42/11593 useless extension candidates. Maximal degree in co-relation 96371. Up to 10461 conditions per place. [2024-06-21 17:22:20,606 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 517 selfloop transitions, 108 changer transitions 0/628 dead transitions. [2024-06-21 17:22:20,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 628 transitions, 13408 flow [2024-06-21 17:22:20,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:20,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-21 17:22:20,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 17:22:20,608 INFO L175 Difference]: Start difference. First operand has 280 places, 578 transitions, 11830 flow. Second operand 11 states and 190 transitions. [2024-06-21 17:22:20,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 628 transitions, 13408 flow [2024-06-21 17:22:22,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 628 transitions, 13209 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-21 17:22:22,137 INFO L231 Difference]: Finished difference. Result has 285 places, 581 transitions, 12006 flow [2024-06-21 17:22:22,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11639, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12006, PETRI_PLACES=285, PETRI_TRANSITIONS=581} [2024-06-21 17:22:22,138 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-21 17:22:22,138 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 581 transitions, 12006 flow [2024-06-21 17:22:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:22,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:22,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:22,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:22:22,138 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 17:22:22,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:22,138 INFO L85 PathProgramCache]: Analyzing trace with hash 574126677, now seen corresponding path program 13 times [2024-06-21 17:22:22,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:22,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425854215] [2024-06-21 17:22:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:22,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:22,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:22,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425854215] [2024-06-21 17:22:22,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425854215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:22,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:22,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:22,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382395296] [2024-06-21 17:22:22,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:22,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:22,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:22,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:22,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:22,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 581 transitions, 12006 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:22,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:22,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:22,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:25,724 INFO L124 PetriNetUnfolderBase]: 7461/11677 cut-off events. [2024-06-21 17:22:25,724 INFO L125 PetriNetUnfolderBase]: For 562114/562131 co-relation queries the response was YES. [2024-06-21 17:22:25,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97760 conditions, 11677 events. 7461/11677 cut-off events. For 562114/562131 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 77107 event pairs, 1726 based on Foata normal form. 38/11715 useless extension candidates. Maximal degree in co-relation 97625. Up to 4742 conditions per place. [2024-06-21 17:22:25,872 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 384 changer transitions 0/633 dead transitions. [2024-06-21 17:22:25,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 633 transitions, 13797 flow [2024-06-21 17:22:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:22:25,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 17:22:25,873 INFO L175 Difference]: Start difference. First operand has 285 places, 581 transitions, 12006 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:22:25,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 633 transitions, 13797 flow [2024-06-21 17:22:27,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 633 transitions, 13524 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 17:22:27,319 INFO L231 Difference]: Finished difference. Result has 286 places, 584 transitions, 12635 flow [2024-06-21 17:22:27,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11733, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12635, PETRI_PLACES=286, PETRI_TRANSITIONS=584} [2024-06-21 17:22:27,319 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-21 17:22:27,320 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 584 transitions, 12635 flow [2024-06-21 17:22:27,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:27,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:27,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:27,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:22:27,320 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 17:22:27,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 659121237, now seen corresponding path program 14 times [2024-06-21 17:22:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:27,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344729329] [2024-06-21 17:22:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:28,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:28,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344729329] [2024-06-21 17:22:28,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344729329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:28,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:28,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:28,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973540789] [2024-06-21 17:22:28,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:28,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:28,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:28,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:28,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:28,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 584 transitions, 12635 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:28,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:28,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:31,158 INFO L124 PetriNetUnfolderBase]: 7673/12075 cut-off events. [2024-06-21 17:22:31,159 INFO L125 PetriNetUnfolderBase]: For 629223/629240 co-relation queries the response was YES. [2024-06-21 17:22:31,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102345 conditions, 12075 events. 7673/12075 cut-off events. For 629223/629240 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 81459 event pairs, 2358 based on Foata normal form. 62/12137 useless extension candidates. Maximal degree in co-relation 102208. Up to 9614 conditions per place. [2024-06-21 17:22:31,323 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 318 selfloop transitions, 310 changer transitions 0/631 dead transitions. [2024-06-21 17:22:31,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 631 transitions, 14215 flow [2024-06-21 17:22:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 17:22:31,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:22:31,324 INFO L175 Difference]: Start difference. First operand has 286 places, 584 transitions, 12635 flow. Second operand 9 states and 162 transitions. [2024-06-21 17:22:31,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 631 transitions, 14215 flow [2024-06-21 17:22:32,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 631 transitions, 13600 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:32,961 INFO L231 Difference]: Finished difference. Result has 288 places, 588 transitions, 12803 flow [2024-06-21 17:22:32,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12023, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12803, PETRI_PLACES=288, PETRI_TRANSITIONS=588} [2024-06-21 17:22:32,962 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-21 17:22:32,962 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 588 transitions, 12803 flow [2024-06-21 17:22:32,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:32,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:32,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:32,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:22:32,963 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 17:22:32,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash 576000627, now seen corresponding path program 15 times [2024-06-21 17:22:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:32,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288956022] [2024-06-21 17:22:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288956022] [2024-06-21 17:22:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288956022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:33,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:33,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:22:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203805127] [2024-06-21 17:22:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:33,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:22:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:33,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:22:33,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:22:33,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:33,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 588 transitions, 12803 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:33,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:33,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:33,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:37,332 INFO L124 PetriNetUnfolderBase]: 8062/12692 cut-off events. [2024-06-21 17:22:37,332 INFO L125 PetriNetUnfolderBase]: For 631869/631886 co-relation queries the response was YES. [2024-06-21 17:22:37,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107231 conditions, 12692 events. 8062/12692 cut-off events. For 631869/631886 co-relation queries the response was YES. Maximal size of possible extension queue 755. Compared 86167 event pairs, 2244 based on Foata normal form. 46/12738 useless extension candidates. Maximal degree in co-relation 107095. Up to 8271 conditions per place. [2024-06-21 17:22:37,487 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 327 changer transitions 0/641 dead transitions. [2024-06-21 17:22:37,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 641 transitions, 14696 flow [2024-06-21 17:22:37,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:22:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:22:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 17:22:37,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:22:37,489 INFO L175 Difference]: Start difference. First operand has 288 places, 588 transitions, 12803 flow. Second operand 9 states and 165 transitions. [2024-06-21 17:22:37,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 641 transitions, 14696 flow [2024-06-21 17:22:39,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 641 transitions, 14053 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:39,279 INFO L231 Difference]: Finished difference. Result has 291 places, 595 transitions, 13153 flow [2024-06-21 17:22:39,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12160, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13153, PETRI_PLACES=291, PETRI_TRANSITIONS=595} [2024-06-21 17:22:39,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-21 17:22:39,281 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 595 transitions, 13153 flow [2024-06-21 17:22:39,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:39,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:39,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:22:39,281 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 17:22:39,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash 662840307, now seen corresponding path program 16 times [2024-06-21 17:22:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571538677] [2024-06-21 17:22:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:40,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571538677] [2024-06-21 17:22:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571538677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:40,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:40,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270934621] [2024-06-21 17:22:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:40,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:40,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 595 transitions, 13153 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:40,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:40,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:40,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:43,751 INFO L124 PetriNetUnfolderBase]: 8121/12800 cut-off events. [2024-06-21 17:22:43,752 INFO L125 PetriNetUnfolderBase]: For 652764/652781 co-relation queries the response was YES. [2024-06-21 17:22:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108416 conditions, 12800 events. 8121/12800 cut-off events. For 652764/652781 co-relation queries the response was YES. Maximal size of possible extension queue 763. Compared 87608 event pairs, 2619 based on Foata normal form. 54/12854 useless extension candidates. Maximal degree in co-relation 108278. Up to 10981 conditions per place. [2024-06-21 17:22:44,012 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 456 selfloop transitions, 200 changer transitions 0/659 dead transitions. [2024-06-21 17:22:44,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 659 transitions, 15122 flow [2024-06-21 17:22:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:22:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:22:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:22:44,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 17:22:44,014 INFO L175 Difference]: Start difference. First operand has 291 places, 595 transitions, 13153 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:22:44,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 659 transitions, 15122 flow [2024-06-21 17:22:46,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 659 transitions, 14732 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:46,241 INFO L231 Difference]: Finished difference. Result has 294 places, 607 transitions, 13612 flow [2024-06-21 17:22:46,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12763, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13612, PETRI_PLACES=294, PETRI_TRANSITIONS=607} [2024-06-21 17:22:46,242 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-21 17:22:46,242 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 607 transitions, 13612 flow [2024-06-21 17:22:46,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:46,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:46,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:46,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:22:46,243 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:46,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:46,244 INFO L85 PathProgramCache]: Analyzing trace with hash -52530577, now seen corresponding path program 4 times [2024-06-21 17:22:46,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:46,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938521936] [2024-06-21 17:22:46,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:46,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:47,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:47,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938521936] [2024-06-21 17:22:47,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938521936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:47,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:47,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:47,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789171582] [2024-06-21 17:22:47,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:47,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:47,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:47,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:47,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 607 transitions, 13612 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:47,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:47,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:47,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:50,651 INFO L124 PetriNetUnfolderBase]: 8171/12885 cut-off events. [2024-06-21 17:22:50,652 INFO L125 PetriNetUnfolderBase]: For 598729/598734 co-relation queries the response was YES. [2024-06-21 17:22:50,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109698 conditions, 12885 events. 8171/12885 cut-off events. For 598729/598734 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 88473 event pairs, 3195 based on Foata normal form. 12/12897 useless extension candidates. Maximal degree in co-relation 109560. Up to 12245 conditions per place. [2024-06-21 17:22:50,852 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 545 selfloop transitions, 110 changer transitions 0/658 dead transitions. [2024-06-21 17:22:50,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 658 transitions, 15320 flow [2024-06-21 17:22:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-21 17:22:50,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022727272727273 [2024-06-21 17:22:50,854 INFO L175 Difference]: Start difference. First operand has 294 places, 607 transitions, 13612 flow. Second operand 11 states and 177 transitions. [2024-06-21 17:22:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 658 transitions, 15320 flow [2024-06-21 17:22:52,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 658 transitions, 14868 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 17:22:52,970 INFO L231 Difference]: Finished difference. Result has 298 places, 612 transitions, 13580 flow [2024-06-21 17:22:52,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13160, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13580, PETRI_PLACES=298, PETRI_TRANSITIONS=612} [2024-06-21 17:22:52,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-21 17:22:52,971 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 612 transitions, 13580 flow [2024-06-21 17:22:52,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:52,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:22:52,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:22:52,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:22:52,972 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:22:52,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:22:52,972 INFO L85 PathProgramCache]: Analyzing trace with hash -660727027, now seen corresponding path program 5 times [2024-06-21 17:22:52,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:22:52,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751333496] [2024-06-21 17:22:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:22:52,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:22:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:22:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:22:54,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:22:54,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751333496] [2024-06-21 17:22:54,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751333496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:22:54,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:22:54,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:22:54,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793514633] [2024-06-21 17:22:54,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:22:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:22:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:22:54,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:22:54,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:22:54,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:22:54,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 612 transitions, 13580 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:22:54,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:22:54,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:22:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:22:57,971 INFO L124 PetriNetUnfolderBase]: 8588/13563 cut-off events. [2024-06-21 17:22:57,971 INFO L125 PetriNetUnfolderBase]: For 693799/693804 co-relation queries the response was YES. [2024-06-21 17:22:58,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117509 conditions, 13563 events. 8588/13563 cut-off events. For 693799/693804 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 94066 event pairs, 3228 based on Foata normal form. 6/13569 useless extension candidates. Maximal degree in co-relation 117370. Up to 11785 conditions per place. [2024-06-21 17:22:58,446 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 494 selfloop transitions, 175 changer transitions 0/672 dead transitions. [2024-06-21 17:22:58,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 672 transitions, 15596 flow [2024-06-21 17:22:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:22:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:22:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 187 transitions. [2024-06-21 17:22:58,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:22:58,448 INFO L175 Difference]: Start difference. First operand has 298 places, 612 transitions, 13580 flow. Second operand 11 states and 187 transitions. [2024-06-21 17:22:58,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 672 transitions, 15596 flow [2024-06-21 17:23:00,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 672 transitions, 15210 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-21 17:23:00,194 INFO L231 Difference]: Finished difference. Result has 301 places, 619 transitions, 13849 flow [2024-06-21 17:23:00,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13194, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13849, PETRI_PLACES=301, PETRI_TRANSITIONS=619} [2024-06-21 17:23:00,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-21 17:23:00,195 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 619 transitions, 13849 flow [2024-06-21 17:23:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:00,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:00,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:00,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:23:00,195 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:00,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash -58094767, now seen corresponding path program 6 times [2024-06-21 17:23:00,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:00,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665131855] [2024-06-21 17:23:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:01,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:01,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665131855] [2024-06-21 17:23:01,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665131855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:01,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:01,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:01,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809895829] [2024-06-21 17:23:01,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:01,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:01,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:01,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:01,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 619 transitions, 13849 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:01,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:01,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:01,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:05,998 INFO L124 PetriNetUnfolderBase]: 8460/13384 cut-off events. [2024-06-21 17:23:05,999 INFO L125 PetriNetUnfolderBase]: For 710975/710980 co-relation queries the response was YES. [2024-06-21 17:23:06,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114205 conditions, 13384 events. 8460/13384 cut-off events. For 710975/710980 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 92916 event pairs, 3207 based on Foata normal form. 62/13446 useless extension candidates. Maximal degree in co-relation 114064. Up to 11908 conditions per place. [2024-06-21 17:23:06,179 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 507 selfloop transitions, 150 changer transitions 0/660 dead transitions. [2024-06-21 17:23:06,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 660 transitions, 15373 flow [2024-06-21 17:23:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 17:23:06,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-21 17:23:06,180 INFO L175 Difference]: Start difference. First operand has 301 places, 619 transitions, 13849 flow. Second operand 9 states and 157 transitions. [2024-06-21 17:23:06,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 660 transitions, 15373 flow [2024-06-21 17:23:07,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 660 transitions, 15077 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 17:23:07,913 INFO L231 Difference]: Finished difference. Result has 303 places, 619 transitions, 13881 flow [2024-06-21 17:23:07,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13553, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13881, PETRI_PLACES=303, PETRI_TRANSITIONS=619} [2024-06-21 17:23:07,913 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-21 17:23:07,914 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 619 transitions, 13881 flow [2024-06-21 17:23:07,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:07,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:23:07,914 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:07,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -666304609, now seen corresponding path program 17 times [2024-06-21 17:23:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:07,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488395735] [2024-06-21 17:23:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:08,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:08,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488395735] [2024-06-21 17:23:08,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488395735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:08,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:08,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:08,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359800628] [2024-06-21 17:23:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:08,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:08,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:08,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:08,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 619 transitions, 13881 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:08,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:08,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:08,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:12,895 INFO L124 PetriNetUnfolderBase]: 8682/13726 cut-off events. [2024-06-21 17:23:12,895 INFO L125 PetriNetUnfolderBase]: For 719103/719108 co-relation queries the response was YES. [2024-06-21 17:23:13,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117082 conditions, 13726 events. 8682/13726 cut-off events. For 719103/719108 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 95554 event pairs, 3346 based on Foata normal form. 52/13778 useless extension candidates. Maximal degree in co-relation 116939. Up to 12089 conditions per place. [2024-06-21 17:23:13,093 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 515 selfloop transitions, 147 changer transitions 0/665 dead transitions. [2024-06-21 17:23:13,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 665 transitions, 15606 flow [2024-06-21 17:23:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 17:23:13,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 17:23:13,095 INFO L175 Difference]: Start difference. First operand has 303 places, 619 transitions, 13881 flow. Second operand 9 states and 156 transitions. [2024-06-21 17:23:13,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 665 transitions, 15606 flow [2024-06-21 17:23:15,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 665 transitions, 15258 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 17:23:15,055 INFO L231 Difference]: Finished difference. Result has 304 places, 624 transitions, 14070 flow [2024-06-21 17:23:15,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13533, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14070, PETRI_PLACES=304, PETRI_TRANSITIONS=624} [2024-06-21 17:23:15,056 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 17:23:15,056 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 624 transitions, 14070 flow [2024-06-21 17:23:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:15,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:15,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:15,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:23:15,057 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:15,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash -666452479, now seen corresponding path program 18 times [2024-06-21 17:23:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:15,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775669632] [2024-06-21 17:23:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:15,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:15,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:15,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775669632] [2024-06-21 17:23:15,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775669632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:15,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:15,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:23:15,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488654934] [2024-06-21 17:23:15,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:15,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:23:15,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:23:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:23:15,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:15,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 624 transitions, 14070 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:15,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:15,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:15,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:19,764 INFO L124 PetriNetUnfolderBase]: 9035/14309 cut-off events. [2024-06-21 17:23:19,764 INFO L125 PetriNetUnfolderBase]: For 783649/783654 co-relation queries the response was YES. [2024-06-21 17:23:19,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123669 conditions, 14309 events. 9035/14309 cut-off events. For 783649/783654 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 100448 event pairs, 3280 based on Foata normal form. 42/14351 useless extension candidates. Maximal degree in co-relation 123525. Up to 10936 conditions per place. [2024-06-21 17:23:19,975 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 492 selfloop transitions, 182 changer transitions 0/677 dead transitions. [2024-06-21 17:23:19,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 677 transitions, 16182 flow [2024-06-21 17:23:19,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:23:19,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:23:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 17:23:19,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 17:23:19,977 INFO L175 Difference]: Start difference. First operand has 304 places, 624 transitions, 14070 flow. Second operand 9 states and 160 transitions. [2024-06-21 17:23:19,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 677 transitions, 16182 flow [2024-06-21 17:23:22,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 677 transitions, 15861 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:22,285 INFO L231 Difference]: Finished difference. Result has 307 places, 632 transitions, 14486 flow [2024-06-21 17:23:22,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13749, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14486, PETRI_PLACES=307, PETRI_TRANSITIONS=632} [2024-06-21 17:23:22,286 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-21 17:23:22,286 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 632 transitions, 14486 flow [2024-06-21 17:23:22,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:22,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:22,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:22,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:23:22,286 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:22,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1078903713, now seen corresponding path program 7 times [2024-06-21 17:23:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:22,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887578732] [2024-06-21 17:23:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:23,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:23,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887578732] [2024-06-21 17:23:23,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887578732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:23,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:23,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:23,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275504410] [2024-06-21 17:23:23,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:23,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 632 transitions, 14486 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:23,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:23,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:23,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:27,579 INFO L124 PetriNetUnfolderBase]: 9085/14383 cut-off events. [2024-06-21 17:23:27,579 INFO L125 PetriNetUnfolderBase]: For 771948/771974 co-relation queries the response was YES. [2024-06-21 17:23:27,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124684 conditions, 14383 events. 9085/14383 cut-off events. For 771948/771974 co-relation queries the response was YES. Maximal size of possible extension queue 893. Compared 101495 event pairs, 3356 based on Foata normal form. 34/14417 useless extension candidates. Maximal degree in co-relation 124539. Up to 13627 conditions per place. [2024-06-21 17:23:27,785 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 551 selfloop transitions, 116 changer transitions 0/670 dead transitions. [2024-06-21 17:23:27,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 670 transitions, 16203 flow [2024-06-21 17:23:27,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:27,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:23:27,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:23:27,786 INFO L175 Difference]: Start difference. First operand has 307 places, 632 transitions, 14486 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:23:27,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 670 transitions, 16203 flow [2024-06-21 17:23:30,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 670 transitions, 15931 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:30,477 INFO L231 Difference]: Finished difference. Result has 309 places, 637 transitions, 14676 flow [2024-06-21 17:23:30,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14216, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14676, PETRI_PLACES=309, PETRI_TRANSITIONS=637} [2024-06-21 17:23:30,477 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-21 17:23:30,477 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 637 transitions, 14676 flow [2024-06-21 17:23:30,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:30,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:30,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:30,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:23:30,478 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:30,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1078896273, now seen corresponding path program 8 times [2024-06-21 17:23:30,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:30,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815728943] [2024-06-21 17:23:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:30,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:31,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:31,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:31,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815728943] [2024-06-21 17:23:31,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815728943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:31,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:31,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517515086] [2024-06-21 17:23:31,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:31,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:31,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:31,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:31,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 637 transitions, 14676 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:31,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:31,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:31,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:23:36,019 INFO L124 PetriNetUnfolderBase]: 9502/15042 cut-off events. [2024-06-21 17:23:36,020 INFO L125 PetriNetUnfolderBase]: For 858317/858343 co-relation queries the response was YES. [2024-06-21 17:23:36,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133418 conditions, 15042 events. 9502/15042 cut-off events. For 858317/858343 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 106797 event pairs, 3486 based on Foata normal form. 28/15070 useless extension candidates. Maximal degree in co-relation 133272. Up to 13748 conditions per place. [2024-06-21 17:23:36,223 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 558 selfloop transitions, 123 changer transitions 0/684 dead transitions. [2024-06-21 17:23:36,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 684 transitions, 16727 flow [2024-06-21 17:23:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:23:36,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:23:36,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:23:36,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:23:36,224 INFO L175 Difference]: Start difference. First operand has 309 places, 637 transitions, 14676 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:23:36,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 684 transitions, 16727 flow [2024-06-21 17:23:39,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 684 transitions, 16341 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-21 17:23:39,215 INFO L231 Difference]: Finished difference. Result has 312 places, 644 transitions, 14855 flow [2024-06-21 17:23:39,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14290, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14855, PETRI_PLACES=312, PETRI_TRANSITIONS=644} [2024-06-21 17:23:39,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-21 17:23:39,216 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 644 transitions, 14855 flow [2024-06-21 17:23:39,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:39,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:23:39,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:23:39,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:23:39,216 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:23:39,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:23:39,217 INFO L85 PathProgramCache]: Analyzing trace with hash 533975275, now seen corresponding path program 9 times [2024-06-21 17:23:39,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:23:39,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775008928] [2024-06-21 17:23:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:23:39,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:23:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:23:40,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:23:40,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:23:40,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775008928] [2024-06-21 17:23:40,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775008928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:23:40,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:23:40,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:23:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708052381] [2024-06-21 17:23:40,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:23:40,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:23:40,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:23:40,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:23:40,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:23:40,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-21 17:23:40,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 644 transitions, 14855 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:23:40,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:23:40,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-21 17:23:40,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand