./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:20:04,317 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:20:04,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:20:04,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:20:04,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:20:04,372 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:20:04,372 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:20:04,373 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:20:04,373 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:20:04,373 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:20:04,374 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:20:04,374 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:20:04,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:20:04,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:20:04,375 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:20:04,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:20:04,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:20:04,376 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:20:04,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:20:04,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:20:04,376 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:20:04,377 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:20:04,377 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:20:04,377 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:20:04,377 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:20:04,378 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:20:04,378 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:20:04,378 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:20:04,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:20:04,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:20:04,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:20:04,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:20:04,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:20:04,379 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:20:04,379 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:20:04,380 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:20:04,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:20:04,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:20:04,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:20:04,380 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:20:04,381 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:20:04,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:20:04,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:20:04,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:20:04,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:20:04,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:20:04,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:20:04,597 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:20:04,597 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:20:04,598 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:20:05,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:20:05,732 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:20:05,733 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:20:05,744 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6868b621e/48471b5f546e49638f6ee5e4e2d247de/FLAG45eaf0bf1 [2024-06-21 16:20:05,759 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6868b621e/48471b5f546e49638f6ee5e4e2d247de [2024-06-21 16:20:05,761 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:20:05,764 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:20:05,764 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix011_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-21 16:20:05,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:20:05,911 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:20:05,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:20:05,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:20:05,917 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:20:05,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:20:05" (1/2) ... [2024-06-21 16:20:05,918 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15171113 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:20:05, skipping insertion in model container [2024-06-21 16:20:05,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:20:05" (1/2) ... [2024-06-21 16:20:05,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4bbc00dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:20:05, skipping insertion in model container [2024-06-21 16:20:05,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:20:05" (2/2) ... [2024-06-21 16:20:05,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15171113 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:20:05, skipping insertion in model container [2024-06-21 16:20:05,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:20:05" (2/2) ... [2024-06-21 16:20:05,920 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:20:06,023 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:20:06,024 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-21 16:20:06,024 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-21 16:20:06,025 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || a$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) [2024-06-21 16:20:06,025 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:20:06,025 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-21 16:20:06,059 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:20:06,312 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:20:06,319 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:20:06,459 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:20:06,498 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:20:06,499 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:20:06 WrapperNode [2024-06-21 16:20:06,499 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:20:06,500 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:20:06,500 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:20:06,500 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:20:06,507 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,521 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,546 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-21 16:20:06,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:20:06,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:20:06,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:20:06,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:20:06,555 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,564 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:20:06" (1/1) ... [2024-06-21 16:20:06,583 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 16:20:06,584 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,584 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,591 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:20:06" (1/1) ... [2024-06-21 16:20:06,592 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,594 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,595 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,597 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:20:06,598 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:20:06,598 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:20:06,598 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:20:06,599 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 04:20:06" (1/1) ... [2024-06-21 16:20:06,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:20:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:20:06,631 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 16:20:06,652 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 16:20:06,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:20:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:20:06,665 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:20:06,665 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:20:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:20:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:20:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:20:06,666 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:20:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:20:06,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:20:06,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:20:06,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:20:06,668 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 16:20:06,802 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:20:06,805 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:20:07,161 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:20:07,163 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:20:07,309 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:20:07,310 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:20:07,310 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:20:07 BoogieIcfgContainer [2024-06-21 16:20:07,310 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:20:07,312 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:20:07,312 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:20:07,315 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:20:07,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:20:05" (1/4) ... [2024-06-21 16:20:07,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeb9bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:20:07, skipping insertion in model container [2024-06-21 16:20:07,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:20:05" (2/4) ... [2024-06-21 16:20:07,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeb9bbe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:20:07, skipping insertion in model container [2024-06-21 16:20:07,316 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 04:20:06" (3/4) ... [2024-06-21 16:20:07,316 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeb9bbe and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:20:07, skipping insertion in model container [2024-06-21 16:20:07,316 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:20:07" (4/4) ... [2024-06-21 16:20:07,317 INFO L112 eAbstractionObserver]: Analyzing ICFG mix011_power.oepc_pso.oepc_rmo.oepc.i [2024-06-21 16:20:07,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:20:07,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:20:07,330 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:20:07,389 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:20:07,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 16:20:07,432 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-21 16:20:07,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:20:07,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:20:07,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-21 16:20:07,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-21 16:20:07,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:20:07,453 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;@573fbfd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:20:07,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:20:07,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:20:07,458 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:20:07,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:20:07,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:07,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:20:07,459 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 16:20:07,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:07,463 INFO L85 PathProgramCache]: Analyzing trace with hash 383652908, now seen corresponding path program 1 times [2024-06-21 16:20:07,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:07,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512026271] [2024-06-21 16:20:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:07,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:08,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512026271] [2024-06-21 16:20:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512026271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:20:08,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551926345] [2024-06-21 16:20:08,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:20:08,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:20:08,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:20:08,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:20:08,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:08,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:08,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:20:08,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:08,911 INFO L124 PetriNetUnfolderBase]: 1659/2585 cut-off events. [2024-06-21 16:20:08,912 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 16:20:08,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5149 conditions, 2585 events. 1659/2585 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12998 event pairs, 1184 based on Foata normal form. 1/2520 useless extension candidates. Maximal degree in co-relation 5137. Up to 2465 conditions per place. [2024-06-21 16:20:08,928 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-21 16:20:08,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-21 16:20:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:20:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:20:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-21 16:20:08,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-21 16:20:08,939 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-21 16:20:08,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-21 16:20:08,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:08,945 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-21 16:20:08,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-21 16:20:08,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-21 16:20:08,949 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-21 16:20:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:08,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:08,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:08,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:20:08,950 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 16:20:08,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:08,951 INFO L85 PathProgramCache]: Analyzing trace with hash -675957289, now seen corresponding path program 1 times [2024-06-21 16:20:08,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:08,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476204659] [2024-06-21 16:20:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:08,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:09,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:09,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476204659] [2024-06-21 16:20:09,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476204659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:09,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:09,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:20:09,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988280546] [2024-06-21 16:20:09,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:20:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:20:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:20:09,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:20:09,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:09,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:09,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:20:09,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:09,958 INFO L124 PetriNetUnfolderBase]: 1653/2576 cut-off events. [2024-06-21 16:20:09,958 INFO L125 PetriNetUnfolderBase]: For 483/483 co-relation queries the response was YES. [2024-06-21 16:20:09,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5765 conditions, 2576 events. 1653/2576 cut-off events. For 483/483 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13013 event pairs, 1038 based on Foata normal form. 3/2553 useless extension candidates. Maximal degree in co-relation 5753. Up to 2441 conditions per place. [2024-06-21 16:20:09,974 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 16:20:09,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-21 16:20:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:20:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:20:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 16:20:09,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-21 16:20:09,978 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-21 16:20:09,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-21 16:20:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:20:09,980 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-21 16:20:09,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-21 16:20:09,981 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-21 16:20:09,981 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-21 16:20:09,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:09,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:09,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:09,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:20:09,984 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 16:20:09,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:09,986 INFO L85 PathProgramCache]: Analyzing trace with hash 520161707, now seen corresponding path program 1 times [2024-06-21 16:20:09,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608248162] [2024-06-21 16:20:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:09,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:10,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:10,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608248162] [2024-06-21 16:20:10,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608248162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:10,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:10,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:20:10,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898118856] [2024-06-21 16:20:10,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:10,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:20:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:10,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:20:10,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:20:10,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:20:10,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 16:20:10,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:10,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:20:10,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:11,269 INFO L124 PetriNetUnfolderBase]: 1661/2602 cut-off events. [2024-06-21 16:20:11,269 INFO L125 PetriNetUnfolderBase]: For 1388/1388 co-relation queries the response was YES. [2024-06-21 16:20:11,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6428 conditions, 2602 events. 1661/2602 cut-off events. For 1388/1388 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13228 event pairs, 812 based on Foata normal form. 5/2584 useless extension candidates. Maximal degree in co-relation 6414. Up to 2387 conditions per place. [2024-06-21 16:20:11,282 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 53 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-21 16:20:11,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 398 flow [2024-06-21 16:20:11,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:20:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:20:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 16:20:11,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6186046511627907 [2024-06-21 16:20:11,284 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 133 transitions. [2024-06-21 16:20:11,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 398 flow [2024-06-21 16:20:11,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:20:11,286 INFO L231 Difference]: Finished difference. Result has 52 places, 51 transitions, 239 flow [2024-06-21 16:20:11,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=52, PETRI_TRANSITIONS=51} [2024-06-21 16:20:11,287 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-21 16:20:11,287 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 51 transitions, 239 flow [2024-06-21 16:20:11,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 16:20:11,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:11,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:11,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:20:11,288 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 16:20:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1775201430, now seen corresponding path program 1 times [2024-06-21 16:20:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:11,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942654275] [2024-06-21 16:20:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942654275] [2024-06-21 16:20:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942654275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:12,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:20:12,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995786717] [2024-06-21 16:20:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:12,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:20:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:20:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:20:12,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:20:12,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 51 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:12,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:12,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:20:12,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:12,881 INFO L124 PetriNetUnfolderBase]: 1669/2614 cut-off events. [2024-06-21 16:20:12,881 INFO L125 PetriNetUnfolderBase]: For 3185/3188 co-relation queries the response was YES. [2024-06-21 16:20:12,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7547 conditions, 2614 events. 1669/2614 cut-off events. For 3185/3188 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13261 event pairs, 666 based on Foata normal form. 7/2598 useless extension candidates. Maximal degree in co-relation 7530. Up to 2373 conditions per place. [2024-06-21 16:20:12,895 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 60 selfloop transitions, 20 changer transitions 0/87 dead transitions. [2024-06-21 16:20:12,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 525 flow [2024-06-21 16:20:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:20:12,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:20:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 16:20:12,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6085271317829457 [2024-06-21 16:20:12,897 INFO L175 Difference]: Start difference. First operand has 52 places, 51 transitions, 239 flow. Second operand 6 states and 157 transitions. [2024-06-21 16:20:12,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 525 flow [2024-06-21 16:20:12,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 87 transitions, 517 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:20:12,901 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 312 flow [2024-06-21 16:20:12,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 16:20:12,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-21 16:20:12,902 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 312 flow [2024-06-21 16:20:12,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:12,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:12,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:12,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:20:12,903 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 16:20:12,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:12,903 INFO L85 PathProgramCache]: Analyzing trace with hash 803331766, now seen corresponding path program 1 times [2024-06-21 16:20:12,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:12,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993484956] [2024-06-21 16:20:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:12,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:14,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:14,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993484956] [2024-06-21 16:20:14,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993484956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:14,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:14,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:20:14,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962246916] [2024-06-21 16:20:14,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:14,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:20:14,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:14,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:20:14,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:20:14,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-21 16:20:14,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 312 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:14,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:14,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-21 16:20:14,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:14,663 INFO L124 PetriNetUnfolderBase]: 1681/2634 cut-off events. [2024-06-21 16:20:14,664 INFO L125 PetriNetUnfolderBase]: For 5035/5038 co-relation queries the response was YES. [2024-06-21 16:20:14,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8418 conditions, 2634 events. 1681/2634 cut-off events. For 5035/5038 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13365 event pairs, 502 based on Foata normal form. 12/2623 useless extension candidates. Maximal degree in co-relation 8398. Up to 2341 conditions per place. [2024-06-21 16:20:14,681 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2024-06-21 16:20:14,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 94 transitions, 626 flow [2024-06-21 16:20:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:20:14,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880398671096345 [2024-06-21 16:20:14,682 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 312 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:20:14,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 94 transitions, 626 flow [2024-06-21 16:20:14,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 577 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:14,687 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 339 flow [2024-06-21 16:20:14,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=339, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-21 16:20:14,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 16:20:14,688 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 339 flow [2024-06-21 16:20:14,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:14,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:14,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:14,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:20:14,688 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 16:20:14,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:14,689 INFO L85 PathProgramCache]: Analyzing trace with hash 139442829, now seen corresponding path program 1 times [2024-06-21 16:20:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454992791] [2024-06-21 16:20:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:15,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:15,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454992791] [2024-06-21 16:20:15,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454992791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:15,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:15,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:20:15,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722236176] [2024-06-21 16:20:15,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:15,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:20:15,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:15,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:20:15,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:20:15,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:15,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 16:20:15,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:15,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:15,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:15,653 INFO L124 PetriNetUnfolderBase]: 1676/2621 cut-off events. [2024-06-21 16:20:15,653 INFO L125 PetriNetUnfolderBase]: For 6848/6848 co-relation queries the response was YES. [2024-06-21 16:20:15,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8939 conditions, 2621 events. 1676/2621 cut-off events. For 6848/6848 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13226 event pairs, 659 based on Foata normal form. 2/2600 useless extension candidates. Maximal degree in co-relation 8917. Up to 2484 conditions per place. [2024-06-21 16:20:15,668 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-06-21 16:20:15,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 68 transitions, 491 flow [2024-06-21 16:20:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:20:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:20:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-21 16:20:15,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 16:20:15,669 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 339 flow. Second operand 5 states and 101 transitions. [2024-06-21 16:20:15,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 68 transitions, 491 flow [2024-06-21 16:20:15,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 68 transitions, 427 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:15,674 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 299 flow [2024-06-21 16:20:15,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=299, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-06-21 16:20:15,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-21 16:20:15,675 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 299 flow [2024-06-21 16:20:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 16:20:15,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:15,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:15,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:20:15,676 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 16:20:15,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:15,676 INFO L85 PathProgramCache]: Analyzing trace with hash 27358305, now seen corresponding path program 1 times [2024-06-21 16:20:15,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:15,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198028459] [2024-06-21 16:20:15,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:15,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:15,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:16,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:16,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198028459] [2024-06-21 16:20:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198028459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:16,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:16,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:20:16,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756298592] [2024-06-21 16:20:16,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:16,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:20:16,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:16,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:20:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:20:16,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:16,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:16,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:16,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:16,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:16,831 INFO L124 PetriNetUnfolderBase]: 1967/3061 cut-off events. [2024-06-21 16:20:16,831 INFO L125 PetriNetUnfolderBase]: For 9000/9000 co-relation queries the response was YES. [2024-06-21 16:20:16,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10285 conditions, 3061 events. 1967/3061 cut-off events. For 9000/9000 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15411 event pairs, 795 based on Foata normal form. 2/3061 useless extension candidates. Maximal degree in co-relation 10261. Up to 2896 conditions per place. [2024-06-21 16:20:16,850 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-21 16:20:16,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 75 transitions, 497 flow [2024-06-21 16:20:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:20:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:20:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 16:20:16,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:20:16,852 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 299 flow. Second operand 6 states and 114 transitions. [2024-06-21 16:20:16,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 75 transitions, 497 flow [2024-06-21 16:20:16,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 75 transitions, 475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:16,857 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 333 flow [2024-06-21 16:20:16,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-21 16:20:16,858 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-21 16:20:16,858 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 333 flow [2024-06-21 16:20:16,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:16,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:16,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:16,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:20:16,858 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 16:20:16,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1055171052, now seen corresponding path program 1 times [2024-06-21 16:20:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412353949] [2024-06-21 16:20:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:16,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:17,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412353949] [2024-06-21 16:20:17,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412353949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:20:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139205276] [2024-06-21 16:20:17,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:17,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:20:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:20:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:20:17,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:17,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 333 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:17,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:17,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:17,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:17,952 INFO L124 PetriNetUnfolderBase]: 1856/2950 cut-off events. [2024-06-21 16:20:17,952 INFO L125 PetriNetUnfolderBase]: For 11514/11520 co-relation queries the response was YES. [2024-06-21 16:20:17,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10566 conditions, 2950 events. 1856/2950 cut-off events. For 11514/11520 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15285 event pairs, 727 based on Foata normal form. 8/2955 useless extension candidates. Maximal degree in co-relation 10542. Up to 2663 conditions per place. [2024-06-21 16:20:17,964 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 57 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-21 16:20:17,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 585 flow [2024-06-21 16:20:17,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:20:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:20:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 16:20:17,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-06-21 16:20:17,967 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 333 flow. Second operand 6 states and 128 transitions. [2024-06-21 16:20:17,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 585 flow [2024-06-21 16:20:17,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 553 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:17,973 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 373 flow [2024-06-21 16:20:17,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-21 16:20:17,975 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-06-21 16:20:17,975 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 373 flow [2024-06-21 16:20:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:17,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:17,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:17,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:20:17,975 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 16:20:17,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1067342892, now seen corresponding path program 2 times [2024-06-21 16:20:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:17,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700488718] [2024-06-21 16:20:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:18,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:18,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700488718] [2024-06-21 16:20:18,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700488718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:18,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:18,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:20:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453431823] [2024-06-21 16:20:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:18,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:20:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:20:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:20:18,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:18,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 373 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:18,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:18,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:18,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:19,095 INFO L124 PetriNetUnfolderBase]: 1841/2924 cut-off events. [2024-06-21 16:20:19,095 INFO L125 PetriNetUnfolderBase]: For 13354/13354 co-relation queries the response was YES. [2024-06-21 16:20:19,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10799 conditions, 2924 events. 1841/2924 cut-off events. For 13354/13354 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15127 event pairs, 723 based on Foata normal form. 2/2924 useless extension candidates. Maximal degree in co-relation 10774. Up to 2704 conditions per place. [2024-06-21 16:20:19,106 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 60 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-21 16:20:19,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 553 flow [2024-06-21 16:20:19,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:20:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:20:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 16:20:19,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-21 16:20:19,108 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 373 flow. Second operand 6 states and 119 transitions. [2024-06-21 16:20:19,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 553 flow [2024-06-21 16:20:19,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 524 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:19,115 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 374 flow [2024-06-21 16:20:19,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-21 16:20:19,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-21 16:20:19,116 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 374 flow [2024-06-21 16:20:19,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:19,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:19,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:19,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:20:19,117 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 16:20:19,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 848109008, now seen corresponding path program 1 times [2024-06-21 16:20:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:19,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016834104] [2024-06-21 16:20:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:19,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:19,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016834104] [2024-06-21 16:20:19,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016834104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:19,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:19,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143030248] [2024-06-21 16:20:19,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:19,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:19,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:19,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 374 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:19,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:19,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:19,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:20,448 INFO L124 PetriNetUnfolderBase]: 1948/3010 cut-off events. [2024-06-21 16:20:20,448 INFO L125 PetriNetUnfolderBase]: For 15615/15615 co-relation queries the response was YES. [2024-06-21 16:20:20,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11343 conditions, 3010 events. 1948/3010 cut-off events. For 15615/15615 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14975 event pairs, 753 based on Foata normal form. 4/3012 useless extension candidates. Maximal degree in co-relation 11317. Up to 2848 conditions per place. [2024-06-21 16:20:20,462 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2024-06-21 16:20:20,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 610 flow [2024-06-21 16:20:20,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:20:20,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 16:20:20,463 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 374 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:20:20,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 610 flow [2024-06-21 16:20:20,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 563 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:20,470 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 393 flow [2024-06-21 16:20:20,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-21 16:20:20,472 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-21 16:20:20,472 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 393 flow [2024-06-21 16:20:20,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:20,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:20,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:20,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:20:20,473 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 16:20:20,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:20,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2063732456, now seen corresponding path program 1 times [2024-06-21 16:20:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:20,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049771487] [2024-06-21 16:20:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:21,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:21,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049771487] [2024-06-21 16:20:21,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049771487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:21,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:21,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357629852] [2024-06-21 16:20:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:21,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:21,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:21,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:21,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:21,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:21,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:21,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:21,770 INFO L124 PetriNetUnfolderBase]: 1970/3077 cut-off events. [2024-06-21 16:20:21,770 INFO L125 PetriNetUnfolderBase]: For 18589/18595 co-relation queries the response was YES. [2024-06-21 16:20:21,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12099 conditions, 3077 events. 1970/3077 cut-off events. For 18589/18595 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15571 event pairs, 740 based on Foata normal form. 5/3079 useless extension candidates. Maximal degree in co-relation 12072. Up to 2770 conditions per place. [2024-06-21 16:20:21,783 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-21 16:20:21,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 98 transitions, 739 flow [2024-06-21 16:20:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:21,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:20:21,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-21 16:20:21,785 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 393 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:20:21,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 98 transitions, 739 flow [2024-06-21 16:20:21,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 697 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:21,799 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 474 flow [2024-06-21 16:20:21,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=474, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-21 16:20:21,800 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-21 16:20:21,800 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 474 flow [2024-06-21 16:20:21,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:21,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:21,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:21,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:20:21,801 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 16:20:21,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:21,801 INFO L85 PathProgramCache]: Analyzing trace with hash 909209798, now seen corresponding path program 2 times [2024-06-21 16:20:21,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:21,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562316597] [2024-06-21 16:20:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:21,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:22,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562316597] [2024-06-21 16:20:22,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562316597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:22,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:22,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880181272] [2024-06-21 16:20:22,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:22,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:22,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:22,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:22,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:22,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 474 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:22,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:22,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:22,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:22,969 INFO L124 PetriNetUnfolderBase]: 1981/3092 cut-off events. [2024-06-21 16:20:22,969 INFO L125 PetriNetUnfolderBase]: For 22356/22356 co-relation queries the response was YES. [2024-06-21 16:20:22,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12964 conditions, 3092 events. 1981/3092 cut-off events. For 22356/22356 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15606 event pairs, 732 based on Foata normal form. 2/3092 useless extension candidates. Maximal degree in co-relation 12936. Up to 2885 conditions per place. [2024-06-21 16:20:22,987 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 76 selfloop transitions, 19 changer transitions 0/100 dead transitions. [2024-06-21 16:20:22,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 824 flow [2024-06-21 16:20:22,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:20:22,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-21 16:20:22,988 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 474 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:20:22,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 824 flow [2024-06-21 16:20:23,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 786 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:23,002 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 552 flow [2024-06-21 16:20:23,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-21 16:20:23,003 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-21 16:20:23,003 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 552 flow [2024-06-21 16:20:23,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:23,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:23,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:23,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:20:23,004 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 16:20:23,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash 521568128, now seen corresponding path program 3 times [2024-06-21 16:20:23,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:23,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656463173] [2024-06-21 16:20:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:23,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:23,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:23,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656463173] [2024-06-21 16:20:23,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656463173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:23,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:23,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:23,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205830838] [2024-06-21 16:20:23,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:23,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:23,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:23,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:23,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:23,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 552 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:23,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:23,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:23,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:24,271 INFO L124 PetriNetUnfolderBase]: 1976/3085 cut-off events. [2024-06-21 16:20:24,271 INFO L125 PetriNetUnfolderBase]: For 25855/25855 co-relation queries the response was YES. [2024-06-21 16:20:24,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13342 conditions, 3085 events. 1976/3085 cut-off events. For 25855/25855 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15595 event pairs, 732 based on Foata normal form. 2/3085 useless extension candidates. Maximal degree in co-relation 13312. Up to 2898 conditions per place. [2024-06-21 16:20:24,289 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 79 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-21 16:20:24,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 98 transitions, 786 flow [2024-06-21 16:20:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:20:24,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 16:20:24,291 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 552 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:20:24,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 98 transitions, 786 flow [2024-06-21 16:20:24,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 734 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:24,304 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 536 flow [2024-06-21 16:20:24,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=536, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-21 16:20:24,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-21 16:20:24,305 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 536 flow [2024-06-21 16:20:24,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 16:20:24,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:24,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:24,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:20:24,307 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:24,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1253364638, now seen corresponding path program 1 times [2024-06-21 16:20:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:24,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857215621] [2024-06-21 16:20:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:24,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857215621] [2024-06-21 16:20:24,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857215621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:24,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:24,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:20:24,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268392002] [2024-06-21 16:20:24,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:24,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:20:24,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:24,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:20:24,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:20:24,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:20:24,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:24,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:24,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:20:24,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:25,236 INFO L124 PetriNetUnfolderBase]: 2486/3720 cut-off events. [2024-06-21 16:20:25,236 INFO L125 PetriNetUnfolderBase]: For 37967/37967 co-relation queries the response was YES. [2024-06-21 16:20:25,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16701 conditions, 3720 events. 2486/3720 cut-off events. For 37967/37967 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 17894 event pairs, 990 based on Foata normal form. 1/3719 useless extension candidates. Maximal degree in co-relation 16669. Up to 3628 conditions per place. [2024-06-21 16:20:25,254 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 73 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-21 16:20:25,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 90 transitions, 742 flow [2024-06-21 16:20:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:20:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:20:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-21 16:20:25,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-21 16:20:25,255 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 536 flow. Second operand 5 states and 89 transitions. [2024-06-21 16:20:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 90 transitions, 742 flow [2024-06-21 16:20:25,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 90 transitions, 706 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:25,274 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 552 flow [2024-06-21 16:20:25,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 16:20:25,274 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-21 16:20:25,274 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 552 flow [2024-06-21 16:20:25,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:25,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:25,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:25,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:20:25,275 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 16:20:25,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -452530493, now seen corresponding path program 1 times [2024-06-21 16:20:25,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:25,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759314496] [2024-06-21 16:20:25,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:26,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:26,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759314496] [2024-06-21 16:20:26,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759314496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:26,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:26,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:26,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890056723] [2024-06-21 16:20:26,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:26,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:26,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:26,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:26,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:26,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 552 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:26,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:26,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:26,839 INFO L124 PetriNetUnfolderBase]: 1964/3079 cut-off events. [2024-06-21 16:20:26,839 INFO L125 PetriNetUnfolderBase]: For 37670/37673 co-relation queries the response was YES. [2024-06-21 16:20:26,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14661 conditions, 3079 events. 1964/3079 cut-off events. For 37670/37673 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15856 event pairs, 720 based on Foata normal form. 4/3080 useless extension candidates. Maximal degree in co-relation 14628. Up to 2716 conditions per place. [2024-06-21 16:20:26,852 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-21 16:20:26,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 860 flow [2024-06-21 16:20:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 16:20:26,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48255813953488375 [2024-06-21 16:20:26,854 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 552 flow. Second operand 8 states and 166 transitions. [2024-06-21 16:20:26,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 860 flow [2024-06-21 16:20:26,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 830 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:26,867 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 619 flow [2024-06-21 16:20:26,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=619, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-06-21 16:20:26,868 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-06-21 16:20:26,868 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 619 flow [2024-06-21 16:20:26,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:26,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:26,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:26,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:20:26,869 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 16:20:26,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash 407142054, now seen corresponding path program 1 times [2024-06-21 16:20:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:26,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692539728] [2024-06-21 16:20:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:26,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:27,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:27,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692539728] [2024-06-21 16:20:27,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692539728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:27,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:27,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:27,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484805885] [2024-06-21 16:20:27,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:27,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:27,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:27,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 619 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:27,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:27,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:27,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:28,131 INFO L124 PetriNetUnfolderBase]: 2078/3198 cut-off events. [2024-06-21 16:20:28,131 INFO L125 PetriNetUnfolderBase]: For 42843/42846 co-relation queries the response was YES. [2024-06-21 16:20:28,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15916 conditions, 3198 events. 2078/3198 cut-off events. For 42843/42846 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16045 event pairs, 765 based on Foata normal form. 2/3197 useless extension candidates. Maximal degree in co-relation 15882. Up to 2875 conditions per place. [2024-06-21 16:20:28,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-21 16:20:28,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 115 transitions, 997 flow [2024-06-21 16:20:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 16:20:28,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850498338870432 [2024-06-21 16:20:28,148 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 619 flow. Second operand 7 states and 146 transitions. [2024-06-21 16:20:28,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 115 transitions, 997 flow [2024-06-21 16:20:28,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 115 transitions, 926 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:28,168 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 662 flow [2024-06-21 16:20:28,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=662, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-21 16:20:28,168 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-21 16:20:28,169 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 662 flow [2024-06-21 16:20:28,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:28,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:28,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:28,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:20:28,169 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 16:20:28,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 407147634, now seen corresponding path program 2 times [2024-06-21 16:20:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089791025] [2024-06-21 16:20:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:28,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:28,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089791025] [2024-06-21 16:20:28,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089791025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:28,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:28,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933137897] [2024-06-21 16:20:28,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:28,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:28,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:28,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:28,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:28,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 662 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:28,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:28,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:28,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:29,411 INFO L124 PetriNetUnfolderBase]: 2089/3214 cut-off events. [2024-06-21 16:20:29,411 INFO L125 PetriNetUnfolderBase]: For 47759/47762 co-relation queries the response was YES. [2024-06-21 16:20:29,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16337 conditions, 3214 events. 2089/3214 cut-off events. For 47759/47762 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16124 event pairs, 765 based on Foata normal form. 2/3213 useless extension candidates. Maximal degree in co-relation 16302. Up to 2887 conditions per place. [2024-06-21 16:20:29,426 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 73 selfloop transitions, 36 changer transitions 0/115 dead transitions. [2024-06-21 16:20:29,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 115 transitions, 1042 flow [2024-06-21 16:20:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:29,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:20:29,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4717607973421927 [2024-06-21 16:20:29,427 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 662 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:20:29,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 115 transitions, 1042 flow [2024-06-21 16:20:29,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 115 transitions, 930 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:20:29,450 INFO L231 Difference]: Finished difference. Result has 85 places, 91 transitions, 671 flow [2024-06-21 16:20:29,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=671, PETRI_PLACES=85, PETRI_TRANSITIONS=91} [2024-06-21 16:20:29,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-21 16:20:29,451 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 91 transitions, 671 flow [2024-06-21 16:20:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:29,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:29,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:29,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:20:29,451 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 16:20:29,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:29,452 INFO L85 PathProgramCache]: Analyzing trace with hash 407147851, now seen corresponding path program 1 times [2024-06-21 16:20:29,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:29,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627586500] [2024-06-21 16:20:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:30,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627586500] [2024-06-21 16:20:30,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627586500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:30,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:30,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:30,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311682562] [2024-06-21 16:20:30,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:30,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:30,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:30,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:30,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:30,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 91 transitions, 671 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:30,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:30,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:30,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:30,800 INFO L124 PetriNetUnfolderBase]: 2173/3342 cut-off events. [2024-06-21 16:20:30,801 INFO L125 PetriNetUnfolderBase]: For 54445/54448 co-relation queries the response was YES. [2024-06-21 16:20:30,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17196 conditions, 3342 events. 2173/3342 cut-off events. For 54445/54448 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16797 event pairs, 687 based on Foata normal form. 8/3347 useless extension candidates. Maximal degree in co-relation 17160. Up to 2866 conditions per place. [2024-06-21 16:20:30,818 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 86 selfloop transitions, 40 changer transitions 0/132 dead transitions. [2024-06-21 16:20:30,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 1153 flow [2024-06-21 16:20:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:20:30,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 16:20:30,820 INFO L175 Difference]: Start difference. First operand has 85 places, 91 transitions, 671 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:20:30,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 1153 flow [2024-06-21 16:20:30,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 1085 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:30,844 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 796 flow [2024-06-21 16:20:30,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=796, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-06-21 16:20:30,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-06-21 16:20:30,844 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 796 flow [2024-06-21 16:20:30,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:30,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:30,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:30,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:20:30,845 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 16:20:30,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1871914131, now seen corresponding path program 2 times [2024-06-21 16:20:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:30,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622162329] [2024-06-21 16:20:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:31,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:31,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:31,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622162329] [2024-06-21 16:20:31,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622162329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:31,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:31,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581546316] [2024-06-21 16:20:31,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:31,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:31,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:31,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:31,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:31,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 796 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:31,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:31,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:31,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:32,266 INFO L124 PetriNetUnfolderBase]: 2227/3424 cut-off events. [2024-06-21 16:20:32,266 INFO L125 PetriNetUnfolderBase]: For 62320/62320 co-relation queries the response was YES. [2024-06-21 16:20:32,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18763 conditions, 3424 events. 2227/3424 cut-off events. For 62320/62320 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 17267 event pairs, 709 based on Foata normal form. 4/3426 useless extension candidates. Maximal degree in co-relation 18725. Up to 3164 conditions per place. [2024-06-21 16:20:32,284 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 106 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-21 16:20:32,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1272 flow [2024-06-21 16:20:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:20:32,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:20:32,286 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 796 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:20:32,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1272 flow [2024-06-21 16:20:32,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1227 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:20:32,314 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 889 flow [2024-06-21 16:20:32,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-06-21 16:20:32,314 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-06-21 16:20:32,314 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 889 flow [2024-06-21 16:20:32,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:32,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:32,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:32,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:20:32,315 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 16:20:32,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 754667163, now seen corresponding path program 3 times [2024-06-21 16:20:32,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:32,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947770816] [2024-06-21 16:20:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:32,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:33,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:33,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947770816] [2024-06-21 16:20:33,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947770816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:33,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:33,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:33,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090767143] [2024-06-21 16:20:33,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:33,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:33,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:33,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:33,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:33,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 889 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:33,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:33,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:33,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:33,684 INFO L124 PetriNetUnfolderBase]: 2217/3410 cut-off events. [2024-06-21 16:20:33,684 INFO L125 PetriNetUnfolderBase]: For 68539/68539 co-relation queries the response was YES. [2024-06-21 16:20:33,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19057 conditions, 3410 events. 2217/3410 cut-off events. For 68539/68539 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17132 event pairs, 707 based on Foata normal form. 4/3412 useless extension candidates. Maximal degree in co-relation 19016. Up to 3183 conditions per place. [2024-06-21 16:20:33,703 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 108 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-21 16:20:33,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 131 transitions, 1201 flow [2024-06-21 16:20:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:20:33,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 16:20:33,704 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 889 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:20:33,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 131 transitions, 1201 flow [2024-06-21 16:20:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 131 transitions, 1125 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:33,737 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 855 flow [2024-06-21 16:20:33,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-21 16:20:33,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-21 16:20:33,737 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 855 flow [2024-06-21 16:20:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:33,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:33,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:33,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:20:33,738 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 16:20:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash 551038381, now seen corresponding path program 4 times [2024-06-21 16:20:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:33,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003707922] [2024-06-21 16:20:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:34,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003707922] [2024-06-21 16:20:34,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003707922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:34,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:34,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872966189] [2024-06-21 16:20:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:34,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:34,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:34,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:34,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:34,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:34,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:35,154 INFO L124 PetriNetUnfolderBase]: 2207/3396 cut-off events. [2024-06-21 16:20:35,155 INFO L125 PetriNetUnfolderBase]: For 73001/73001 co-relation queries the response was YES. [2024-06-21 16:20:35,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19125 conditions, 3396 events. 2207/3396 cut-off events. For 73001/73001 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17107 event pairs, 705 based on Foata normal form. 4/3398 useless extension candidates. Maximal degree in co-relation 19083. Up to 3106 conditions per place. [2024-06-21 16:20:35,174 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 100 selfloop transitions, 29 changer transitions 0/135 dead transitions. [2024-06-21 16:20:35,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 135 transitions, 1225 flow [2024-06-21 16:20:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:35,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:20:35,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:20:35,175 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 855 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:20:35,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 135 transitions, 1225 flow [2024-06-21 16:20:35,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 135 transitions, 1181 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:35,207 INFO L231 Difference]: Finished difference. Result has 100 places, 110 transitions, 929 flow [2024-06-21 16:20:35,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=929, PETRI_PLACES=100, PETRI_TRANSITIONS=110} [2024-06-21 16:20:35,207 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-21 16:20:35,207 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 110 transitions, 929 flow [2024-06-21 16:20:35,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:35,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:35,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:35,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:20:35,208 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 16:20:35,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1011255880, now seen corresponding path program 3 times [2024-06-21 16:20:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:35,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77768156] [2024-06-21 16:20:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:35,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:35,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77768156] [2024-06-21 16:20:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77768156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:20:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50354154] [2024-06-21 16:20:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:20:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:20:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:20:35,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:35,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 110 transitions, 929 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:35,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:35,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:36,427 INFO L124 PetriNetUnfolderBase]: 2202/3390 cut-off events. [2024-06-21 16:20:36,428 INFO L125 PetriNetUnfolderBase]: For 79288/79291 co-relation queries the response was YES. [2024-06-21 16:20:36,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19563 conditions, 3390 events. 2202/3390 cut-off events. For 79288/79291 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17126 event pairs, 709 based on Foata normal form. 4/3391 useless extension candidates. Maximal degree in co-relation 19520. Up to 3171 conditions per place. [2024-06-21 16:20:36,447 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 107 selfloop transitions, 16 changer transitions 0/129 dead transitions. [2024-06-21 16:20:36,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 129 transitions, 1223 flow [2024-06-21 16:20:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:20:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:20:36,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 16:20:36,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-21 16:20:36,449 INFO L175 Difference]: Start difference. First operand has 100 places, 110 transitions, 929 flow. Second operand 7 states and 132 transitions. [2024-06-21 16:20:36,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 129 transitions, 1223 flow [2024-06-21 16:20:36,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 129 transitions, 1119 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:36,488 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 865 flow [2024-06-21 16:20:36,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=865, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-06-21 16:20:36,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-21 16:20:36,488 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 865 flow [2024-06-21 16:20:36,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:36,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:36,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:36,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:20:36,489 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:36,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:36,489 INFO L85 PathProgramCache]: Analyzing trace with hash 199599284, now seen corresponding path program 1 times [2024-06-21 16:20:36,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:36,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206040563] [2024-06-21 16:20:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:37,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206040563] [2024-06-21 16:20:37,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206040563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:37,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:37,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:20:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774476281] [2024-06-21 16:20:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:20:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:20:37,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:20:37,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:20:37,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 865 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:37,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:37,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:20:37,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:37,677 INFO L124 PetriNetUnfolderBase]: 2625/3930 cut-off events. [2024-06-21 16:20:37,677 INFO L125 PetriNetUnfolderBase]: For 96359/96359 co-relation queries the response was YES. [2024-06-21 16:20:37,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22451 conditions, 3930 events. 2625/3930 cut-off events. For 96359/96359 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18832 event pairs, 906 based on Foata normal form. 3/3931 useless extension candidates. Maximal degree in co-relation 22407. Up to 3824 conditions per place. [2024-06-21 16:20:37,701 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 102 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-21 16:20:37,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 124 transitions, 1145 flow [2024-06-21 16:20:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:20:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:20:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 16:20:37,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 16:20:37,702 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 865 flow. Second operand 6 states and 104 transitions. [2024-06-21 16:20:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 124 transitions, 1145 flow [2024-06-21 16:20:37,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 124 transitions, 1080 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:37,750 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 862 flow [2024-06-21 16:20:37,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=862, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-21 16:20:37,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-21 16:20:37,751 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 862 flow [2024-06-21 16:20:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:37,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:37,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:20:37,751 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 16:20:37,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1032722267, now seen corresponding path program 1 times [2024-06-21 16:20:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891559556] [2024-06-21 16:20:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:38,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:38,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891559556] [2024-06-21 16:20:38,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891559556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:38,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:38,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:38,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607583697] [2024-06-21 16:20:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:38,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:38,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:38,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:38,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:38,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 862 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:38,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:38,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:38,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:39,337 INFO L124 PetriNetUnfolderBase]: 2101/3296 cut-off events. [2024-06-21 16:20:39,337 INFO L125 PetriNetUnfolderBase]: For 90635/90638 co-relation queries the response was YES. [2024-06-21 16:20:39,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19806 conditions, 3296 events. 2101/3296 cut-off events. For 90635/90638 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17117 event pairs, 488 based on Foata normal form. 6/3299 useless extension candidates. Maximal degree in co-relation 19761. Up to 2812 conditions per place. [2024-06-21 16:20:39,356 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 107 selfloop transitions, 29 changer transitions 0/150 dead transitions. [2024-06-21 16:20:39,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 150 transitions, 1368 flow [2024-06-21 16:20:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:20:39,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 16:20:39,358 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 862 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:20:39,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 150 transitions, 1368 flow [2024-06-21 16:20:39,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 150 transitions, 1328 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:39,410 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 955 flow [2024-06-21 16:20:39,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=955, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-21 16:20:39,410 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-21 16:20:39,410 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 955 flow [2024-06-21 16:20:39,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:39,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:39,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:39,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:20:39,411 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 16:20:39,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash 894756511, now seen corresponding path program 1 times [2024-06-21 16:20:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:39,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937490385] [2024-06-21 16:20:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:40,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:40,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937490385] [2024-06-21 16:20:40,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937490385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:40,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:40,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474651982] [2024-06-21 16:20:40,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:40,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:40,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:40,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 955 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:40,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:40,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:40,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:41,174 INFO L124 PetriNetUnfolderBase]: 2226/3428 cut-off events. [2024-06-21 16:20:41,174 INFO L125 PetriNetUnfolderBase]: For 97853/97856 co-relation queries the response was YES. [2024-06-21 16:20:41,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20915 conditions, 3428 events. 2226/3428 cut-off events. For 97853/97856 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17339 event pairs, 657 based on Foata normal form. 2/3427 useless extension candidates. Maximal degree in co-relation 20869. Up to 3008 conditions per place. [2024-06-21 16:20:41,193 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 108 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2024-06-21 16:20:41,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 162 transitions, 1529 flow [2024-06-21 16:20:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:20:41,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:20:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:20:41,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 16:20:41,194 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 955 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:20:41,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 162 transitions, 1529 flow [2024-06-21 16:20:41,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 162 transitions, 1466 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:41,238 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 1075 flow [2024-06-21 16:20:41,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1075, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-21 16:20:41,239 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-21 16:20:41,239 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 1075 flow [2024-06-21 16:20:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:41,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:41,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:41,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:20:41,239 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 16:20:41,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1146223187, now seen corresponding path program 2 times [2024-06-21 16:20:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:41,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567224707] [2024-06-21 16:20:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:41,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567224707] [2024-06-21 16:20:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567224707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:42,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042654331] [2024-06-21 16:20:42,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:42,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:42,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:42,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 1075 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:42,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:42,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:42,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:42,793 INFO L124 PetriNetUnfolderBase]: 2149/3364 cut-off events. [2024-06-21 16:20:42,793 INFO L125 PetriNetUnfolderBase]: For 107351/107354 co-relation queries the response was YES. [2024-06-21 16:20:42,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21301 conditions, 3364 events. 2149/3364 cut-off events. For 107351/107354 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17451 event pairs, 624 based on Foata normal form. 6/3367 useless extension candidates. Maximal degree in co-relation 21253. Up to 2945 conditions per place. [2024-06-21 16:20:42,816 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 114 selfloop transitions, 28 changer transitions 0/158 dead transitions. [2024-06-21 16:20:42,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 158 transitions, 1485 flow [2024-06-21 16:20:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:42,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:20:42,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-21 16:20:42,817 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 1075 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:20:42,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 158 transitions, 1485 flow [2024-06-21 16:20:42,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1394 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:42,868 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 1101 flow [2024-06-21 16:20:42,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1101, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-21 16:20:42,869 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-21 16:20:42,869 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 1101 flow [2024-06-21 16:20:42,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:42,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:42,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:42,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:20:42,870 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 16:20:42,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:42,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1143426677, now seen corresponding path program 3 times [2024-06-21 16:20:42,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:42,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092115745] [2024-06-21 16:20:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:42,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:43,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092115745] [2024-06-21 16:20:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092115745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:43,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:43,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:43,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884598038] [2024-06-21 16:20:43,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:43,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:43,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:43,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:43,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:43,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-21 16:20:43,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 1101 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:43,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:43,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-21 16:20:43,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:44,491 INFO L124 PetriNetUnfolderBase]: 2141/3352 cut-off events. [2024-06-21 16:20:44,491 INFO L125 PetriNetUnfolderBase]: For 113933/113936 co-relation queries the response was YES. [2024-06-21 16:20:44,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21498 conditions, 3352 events. 2141/3352 cut-off events. For 113933/113936 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17404 event pairs, 622 based on Foata normal form. 6/3355 useless extension candidates. Maximal degree in co-relation 21448. Up to 2966 conditions per place. [2024-06-21 16:20:44,512 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 115 selfloop transitions, 24 changer transitions 0/155 dead transitions. [2024-06-21 16:20:44,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1447 flow [2024-06-21 16:20:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:20:44,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47093023255813954 [2024-06-21 16:20:44,514 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 1101 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:20:44,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1447 flow [2024-06-21 16:20:44,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 155 transitions, 1371 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:44,569 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1080 flow [2024-06-21 16:20:44,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1080, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-21 16:20:44,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-21 16:20:44,570 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1080 flow [2024-06-21 16:20:44,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:44,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:44,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:44,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:20:44,570 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 16:20:44,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -263501497, now seen corresponding path program 2 times [2024-06-21 16:20:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342677702] [2024-06-21 16:20:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:45,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:45,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342677702] [2024-06-21 16:20:45,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342677702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:45,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:45,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374578537] [2024-06-21 16:20:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:45,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:45,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:45,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:45,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1080 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:45,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:45,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:45,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:46,200 INFO L124 PetriNetUnfolderBase]: 2257/3473 cut-off events. [2024-06-21 16:20:46,200 INFO L125 PetriNetUnfolderBase]: For 120812/120815 co-relation queries the response was YES. [2024-06-21 16:20:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22306 conditions, 3473 events. 2257/3473 cut-off events. For 120812/120815 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17600 event pairs, 655 based on Foata normal form. 2/3472 useless extension candidates. Maximal degree in co-relation 22255. Up to 3079 conditions per place. [2024-06-21 16:20:46,219 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 114 selfloop transitions, 49 changer transitions 0/169 dead transitions. [2024-06-21 16:20:46,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 169 transitions, 1640 flow [2024-06-21 16:20:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:20:46,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:20:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:20:46,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-21 16:20:46,220 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1080 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:20:46,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 169 transitions, 1640 flow [2024-06-21 16:20:46,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 169 transitions, 1564 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:20:46,279 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 1145 flow [2024-06-21 16:20:46,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1145, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2024-06-21 16:20:46,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-21 16:20:46,280 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 1145 flow [2024-06-21 16:20:46,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:46,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:46,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:46,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:20:46,281 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 16:20:46,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash -263496661, now seen corresponding path program 1 times [2024-06-21 16:20:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:46,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539033702] [2024-06-21 16:20:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539033702] [2024-06-21 16:20:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539033702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:47,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:47,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:47,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144829582] [2024-06-21 16:20:47,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:47,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:47,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:47,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:47,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:47,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 1145 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:47,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:47,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:47,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:47,735 INFO L124 PetriNetUnfolderBase]: 2279/3505 cut-off events. [2024-06-21 16:20:47,735 INFO L125 PetriNetUnfolderBase]: For 129865/129868 co-relation queries the response was YES. [2024-06-21 16:20:47,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22833 conditions, 3505 events. 2279/3505 cut-off events. For 129865/129868 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 17788 event pairs, 625 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 22781. Up to 2979 conditions per place. [2024-06-21 16:20:47,757 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 107 selfloop transitions, 55 changer transitions 0/168 dead transitions. [2024-06-21 16:20:47,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 168 transitions, 1711 flow [2024-06-21 16:20:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 16:20:47,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49127906976744184 [2024-06-21 16:20:47,758 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 1145 flow. Second operand 8 states and 169 transitions. [2024-06-21 16:20:47,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 168 transitions, 1711 flow [2024-06-21 16:20:47,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1593 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:47,825 INFO L231 Difference]: Finished difference. Result has 118 places, 134 transitions, 1189 flow [2024-06-21 16:20:47,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1189, PETRI_PLACES=118, PETRI_TRANSITIONS=134} [2024-06-21 16:20:47,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-21 16:20:47,826 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 134 transitions, 1189 flow [2024-06-21 16:20:47,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:47,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:47,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:47,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:20:47,826 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 16:20:47,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash -263317171, now seen corresponding path program 2 times [2024-06-21 16:20:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:47,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312587935] [2024-06-21 16:20:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312587935] [2024-06-21 16:20:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312587935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:48,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:48,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:48,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057719470] [2024-06-21 16:20:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:48,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:48,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:48,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 134 transitions, 1189 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:48,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:48,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:48,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:49,249 INFO L124 PetriNetUnfolderBase]: 2333/3588 cut-off events. [2024-06-21 16:20:49,249 INFO L125 PetriNetUnfolderBase]: For 140888/140891 co-relation queries the response was YES. [2024-06-21 16:20:49,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23766 conditions, 3588 events. 2333/3588 cut-off events. For 140888/140891 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18245 event pairs, 634 based on Foata normal form. 4/3589 useless extension candidates. Maximal degree in co-relation 23713. Up to 3025 conditions per place. [2024-06-21 16:20:49,273 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 110 selfloop transitions, 57 changer transitions 0/173 dead transitions. [2024-06-21 16:20:49,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 173 transitions, 1933 flow [2024-06-21 16:20:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:20:49,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-21 16:20:49,274 INFO L175 Difference]: Start difference. First operand has 118 places, 134 transitions, 1189 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:20:49,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 173 transitions, 1933 flow [2024-06-21 16:20:49,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1759 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:49,369 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1238 flow [2024-06-21 16:20:49,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1238, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-21 16:20:49,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-21 16:20:49,370 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1238 flow [2024-06-21 16:20:49,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:49,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:49,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:49,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:20:49,370 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 16:20:49,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash -263323867, now seen corresponding path program 3 times [2024-06-21 16:20:49,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:49,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053681356] [2024-06-21 16:20:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:50,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:50,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053681356] [2024-06-21 16:20:50,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053681356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:50,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:50,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:50,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100219555] [2024-06-21 16:20:50,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:50,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:50,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:50,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:50,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:50,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:50,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1238 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:50,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:50,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:50,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:50,869 INFO L124 PetriNetUnfolderBase]: 2344/3604 cut-off events. [2024-06-21 16:20:50,869 INFO L125 PetriNetUnfolderBase]: For 148340/148343 co-relation queries the response was YES. [2024-06-21 16:20:50,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24063 conditions, 3604 events. 2344/3604 cut-off events. For 148340/148343 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18325 event pairs, 667 based on Foata normal form. 2/3603 useless extension candidates. Maximal degree in co-relation 24009. Up to 3250 conditions per place. [2024-06-21 16:20:50,894 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 124 selfloop transitions, 39 changer transitions 0/169 dead transitions. [2024-06-21 16:20:50,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 169 transitions, 1664 flow [2024-06-21 16:20:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:20:50,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:20:50,895 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1238 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:20:50,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 169 transitions, 1664 flow [2024-06-21 16:20:50,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 169 transitions, 1559 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:20:50,976 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1259 flow [2024-06-21 16:20:50,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-21 16:20:50,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-21 16:20:50,976 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1259 flow [2024-06-21 16:20:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:50,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:50,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:50,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:20:50,977 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 16:20:50,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:50,977 INFO L85 PathProgramCache]: Analyzing trace with hash 899518297, now seen corresponding path program 3 times [2024-06-21 16:20:50,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:50,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081101216] [2024-06-21 16:20:50,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:50,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:51,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:51,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081101216] [2024-06-21 16:20:51,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081101216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:51,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:51,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:51,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277565757] [2024-06-21 16:20:51,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:51,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:51,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:51,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1259 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:51,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:51,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:51,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:52,439 INFO L124 PetriNetUnfolderBase]: 2334/3590 cut-off events. [2024-06-21 16:20:52,439 INFO L125 PetriNetUnfolderBase]: For 156290/156293 co-relation queries the response was YES. [2024-06-21 16:20:52,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24033 conditions, 3590 events. 2334/3590 cut-off events. For 156290/156293 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18263 event pairs, 632 based on Foata normal form. 4/3591 useless extension candidates. Maximal degree in co-relation 23978. Up to 3033 conditions per place. [2024-06-21 16:20:52,464 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 113 selfloop transitions, 56 changer transitions 0/175 dead transitions. [2024-06-21 16:20:52,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 175 transitions, 1803 flow [2024-06-21 16:20:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:20:52,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-21 16:20:52,465 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1259 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:20:52,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 175 transitions, 1803 flow [2024-06-21 16:20:52,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 175 transitions, 1691 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:52,565 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1267 flow [2024-06-21 16:20:52,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1267, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2024-06-21 16:20:52,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-21 16:20:52,566 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1267 flow [2024-06-21 16:20:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:52,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:52,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:20:52,566 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:52,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash -646907903, now seen corresponding path program 1 times [2024-06-21 16:20:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684382001] [2024-06-21 16:20:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:53,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:53,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684382001] [2024-06-21 16:20:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684382001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:53,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:20:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584689999] [2024-06-21 16:20:53,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:53,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:20:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:20:53,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:20:53,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:20:53,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1267 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:53,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:53,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:20:53,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:53,737 INFO L124 PetriNetUnfolderBase]: 2809/4197 cut-off events. [2024-06-21 16:20:53,737 INFO L125 PetriNetUnfolderBase]: For 187415/187415 co-relation queries the response was YES. [2024-06-21 16:20:53,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28053 conditions, 4197 events. 2809/4197 cut-off events. For 187415/187415 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20383 event pairs, 876 based on Foata normal form. 1/4196 useless extension candidates. Maximal degree in co-relation 27997. Up to 4054 conditions per place. [2024-06-21 16:20:53,766 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 134 selfloop transitions, 16 changer transitions 0/165 dead transitions. [2024-06-21 16:20:53,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 165 transitions, 1743 flow [2024-06-21 16:20:53,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:20:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:20:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 16:20:53,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-21 16:20:53,767 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1267 flow. Second operand 6 states and 111 transitions. [2024-06-21 16:20:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 165 transitions, 1743 flow [2024-06-21 16:20:53,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 165 transitions, 1614 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:20:53,873 INFO L231 Difference]: Finished difference. Result has 125 places, 149 transitions, 1254 flow [2024-06-21 16:20:53,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1254, PETRI_PLACES=125, PETRI_TRANSITIONS=149} [2024-06-21 16:20:53,873 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 81 predicate places. [2024-06-21 16:20:53,874 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 149 transitions, 1254 flow [2024-06-21 16:20:53,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:53,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:53,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:53,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:20:53,874 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 16:20:53,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:53,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1275878935, now seen corresponding path program 4 times [2024-06-21 16:20:53,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:53,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722034078] [2024-06-21 16:20:53,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:53,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:54,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722034078] [2024-06-21 16:20:54,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722034078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:54,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:54,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657796578] [2024-06-21 16:20:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:54,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:54,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:54,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:54,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:54,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:54,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 149 transitions, 1254 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:54,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:54,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:54,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:55,244 INFO L124 PetriNetUnfolderBase]: 2377/3645 cut-off events. [2024-06-21 16:20:55,245 INFO L125 PetriNetUnfolderBase]: For 176407/176410 co-relation queries the response was YES. [2024-06-21 16:20:55,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25127 conditions, 3645 events. 2377/3645 cut-off events. For 176407/176410 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18486 event pairs, 660 based on Foata normal form. 6/3648 useless extension candidates. Maximal degree in co-relation 25070. Up to 3387 conditions per place. [2024-06-21 16:20:55,269 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 150 selfloop transitions, 19 changer transitions 0/177 dead transitions. [2024-06-21 16:20:55,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 177 transitions, 1701 flow [2024-06-21 16:20:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:20:55,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-21 16:20:55,270 INFO L175 Difference]: Start difference. First operand has 125 places, 149 transitions, 1254 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:20:55,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 177 transitions, 1701 flow [2024-06-21 16:20:55,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 177 transitions, 1659 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 16:20:55,367 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1307 flow [2024-06-21 16:20:55,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1307, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-21 16:20:55,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-21 16:20:55,367 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1307 flow [2024-06-21 16:20:55,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:55,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:55,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:55,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:20:55,368 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 16:20:55,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash 2100205419, now seen corresponding path program 5 times [2024-06-21 16:20:55,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:55,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60304061] [2024-06-21 16:20:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:55,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:56,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:56,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60304061] [2024-06-21 16:20:56,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60304061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:56,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:56,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12293383] [2024-06-21 16:20:56,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:56,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:56,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:56,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:56,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:56,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:56,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1307 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:56,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:56,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:56,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:56,760 INFO L124 PetriNetUnfolderBase]: 2399/3682 cut-off events. [2024-06-21 16:20:56,760 INFO L125 PetriNetUnfolderBase]: For 187052/187055 co-relation queries the response was YES. [2024-06-21 16:20:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25707 conditions, 3682 events. 2399/3682 cut-off events. For 187052/187055 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 18726 event pairs, 660 based on Foata normal form. 6/3685 useless extension candidates. Maximal degree in co-relation 25648. Up to 3336 conditions per place. [2024-06-21 16:20:56,783 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 144 selfloop transitions, 31 changer transitions 0/183 dead transitions. [2024-06-21 16:20:56,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1910 flow [2024-06-21 16:20:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:20:56,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-21 16:20:56,784 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1307 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:20:56,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1910 flow [2024-06-21 16:20:56,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 183 transitions, 1848 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:56,888 INFO L231 Difference]: Finished difference. Result has 133 places, 155 transitions, 1364 flow [2024-06-21 16:20:56,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1245, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1364, PETRI_PLACES=133, PETRI_TRANSITIONS=155} [2024-06-21 16:20:56,888 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-21 16:20:56,888 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 155 transitions, 1364 flow [2024-06-21 16:20:56,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:56,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:56,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:56,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:20:56,889 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 16:20:56,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2100198909, now seen corresponding path program 6 times [2024-06-21 16:20:56,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:56,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656173781] [2024-06-21 16:20:56,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:56,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:57,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:57,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:57,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656173781] [2024-06-21 16:20:57,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656173781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:57,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:57,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:57,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162599428] [2024-06-21 16:20:57,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:57,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:57,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:57,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:57,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:57,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 155 transitions, 1364 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:57,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:57,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:57,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:58,327 INFO L124 PetriNetUnfolderBase]: 2389/3668 cut-off events. [2024-06-21 16:20:58,327 INFO L125 PetriNetUnfolderBase]: For 194901/194904 co-relation queries the response was YES. [2024-06-21 16:20:58,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25814 conditions, 3668 events. 2389/3668 cut-off events. For 194901/194904 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18657 event pairs, 653 based on Foata normal form. 6/3671 useless extension candidates. Maximal degree in co-relation 25754. Up to 3328 conditions per place. [2024-06-21 16:20:58,352 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 141 selfloop transitions, 32 changer transitions 0/181 dead transitions. [2024-06-21 16:20:58,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 181 transitions, 1780 flow [2024-06-21 16:20:58,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:20:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:20:58,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:20:58,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 16:20:58,353 INFO L175 Difference]: Start difference. First operand has 133 places, 155 transitions, 1364 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:20:58,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 181 transitions, 1780 flow [2024-06-21 16:20:58,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 181 transitions, 1633 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:58,486 INFO L231 Difference]: Finished difference. Result has 135 places, 155 transitions, 1289 flow [2024-06-21 16:20:58,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1289, PETRI_PLACES=135, PETRI_TRANSITIONS=155} [2024-06-21 16:20:58,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 16:20:58,487 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 155 transitions, 1289 flow [2024-06-21 16:20:58,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:58,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:58,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:58,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:20:58,487 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 16:20:58,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2100198723, now seen corresponding path program 4 times [2024-06-21 16:20:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:58,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727681031] [2024-06-21 16:20:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:58,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:59,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:59,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727681031] [2024-06-21 16:20:59,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727681031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:59,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:59,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:20:59,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237462987] [2024-06-21 16:20:59,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:59,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:20:59,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:59,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:20:59,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:20:59,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:20:59,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 155 transitions, 1289 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:59,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:59,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:20:59,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:59,997 INFO L124 PetriNetUnfolderBase]: 2384/3661 cut-off events. [2024-06-21 16:20:59,997 INFO L125 PetriNetUnfolderBase]: For 201889/201892 co-relation queries the response was YES. [2024-06-21 16:21:00,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25850 conditions, 3661 events. 2384/3661 cut-off events. For 201889/201892 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18599 event pairs, 663 based on Foata normal form. 4/3662 useless extension candidates. Maximal degree in co-relation 25789. Up to 3421 conditions per place. [2024-06-21 16:21:00,023 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 19 changer transitions 0/178 dead transitions. [2024-06-21 16:21:00,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 178 transitions, 1687 flow [2024-06-21 16:21:00,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:21:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:21:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:21:00,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-21 16:21:00,025 INFO L175 Difference]: Start difference. First operand has 135 places, 155 transitions, 1289 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:21:00,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 178 transitions, 1687 flow [2024-06-21 16:21:00,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 178 transitions, 1570 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:00,154 INFO L231 Difference]: Finished difference. Result has 135 places, 155 transitions, 1218 flow [2024-06-21 16:21:00,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1218, PETRI_PLACES=135, PETRI_TRANSITIONS=155} [2024-06-21 16:21:00,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 16:21:00,155 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 155 transitions, 1218 flow [2024-06-21 16:21:00,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:00,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:00,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:00,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:21:00,156 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:00,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1892595837, now seen corresponding path program 2 times [2024-06-21 16:21:00,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:00,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131247921] [2024-06-21 16:21:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:00,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:00,710 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 16:21:00,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:00,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131247921] [2024-06-21 16:21:00,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131247921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:00,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:00,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:21:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859404430] [2024-06-21 16:21:00,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:00,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:21:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:21:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:21:00,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:00,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 155 transitions, 1218 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:00,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:00,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:00,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:01,353 INFO L124 PetriNetUnfolderBase]: 2848/4257 cut-off events. [2024-06-21 16:21:01,353 INFO L125 PetriNetUnfolderBase]: For 238728/238728 co-relation queries the response was YES. [2024-06-21 16:21:01,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29490 conditions, 4257 events. 2848/4257 cut-off events. For 238728/238728 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20676 event pairs, 881 based on Foata normal form. 1/4256 useless extension candidates. Maximal degree in co-relation 29428. Up to 4135 conditions per place. [2024-06-21 16:21:01,385 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 138 selfloop transitions, 11 changer transitions 0/164 dead transitions. [2024-06-21 16:21:01,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 164 transitions, 1538 flow [2024-06-21 16:21:01,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:21:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:21:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 16:21:01,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:21:01,387 INFO L175 Difference]: Start difference. First operand has 135 places, 155 transitions, 1218 flow. Second operand 6 states and 102 transitions. [2024-06-21 16:21:01,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 164 transitions, 1538 flow [2024-06-21 16:21:01,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 164 transitions, 1459 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:01,525 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1167 flow [2024-06-21 16:21:01,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1167, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-21 16:21:01,526 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-21 16:21:01,526 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1167 flow [2024-06-21 16:21:01,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:01,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:01,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:01,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:21:01,527 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:01,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1884983229, now seen corresponding path program 1 times [2024-06-21 16:21:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:01,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562582065] [2024-06-21 16:21:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:01,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:02,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:02,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562582065] [2024-06-21 16:21:02,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562582065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:02,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:02,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:21:02,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765336428] [2024-06-21 16:21:02,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:02,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:21:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:21:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:21:02,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:02,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1167 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:02,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:02,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:02,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:02,811 INFO L124 PetriNetUnfolderBase]: 2853/4264 cut-off events. [2024-06-21 16:21:02,811 INFO L125 PetriNetUnfolderBase]: For 250156/250156 co-relation queries the response was YES. [2024-06-21 16:21:02,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29743 conditions, 4264 events. 2853/4264 cut-off events. For 250156/250156 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20680 event pairs, 881 based on Foata normal form. 1/4263 useless extension candidates. Maximal degree in co-relation 29680. Up to 4129 conditions per place. [2024-06-21 16:21:02,840 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 143 selfloop transitions, 16 changer transitions 0/174 dead transitions. [2024-06-21 16:21:02,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 174 transitions, 1657 flow [2024-06-21 16:21:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:21:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:21:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 16:21:02,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:21:02,841 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1167 flow. Second operand 6 states and 108 transitions. [2024-06-21 16:21:02,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 174 transitions, 1657 flow [2024-06-21 16:21:03,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 174 transitions, 1625 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:03,040 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 1243 flow [2024-06-21 16:21:03,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1243, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2024-06-21 16:21:03,041 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-21 16:21:03,041 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 1243 flow [2024-06-21 16:21:03,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:03,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:03,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:03,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:21:03,042 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:03,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -857106337, now seen corresponding path program 2 times [2024-06-21 16:21:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:03,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794686850] [2024-06-21 16:21:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:03,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:03,535 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 16:21:03,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794686850] [2024-06-21 16:21:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794686850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:03,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:03,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:21:03,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801046694] [2024-06-21 16:21:03,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:03,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:21:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:21:03,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:21:03,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:03,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 1243 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:03,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:03,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:03,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:04,285 INFO L124 PetriNetUnfolderBase]: 2850/4261 cut-off events. [2024-06-21 16:21:04,285 INFO L125 PetriNetUnfolderBase]: For 262641/262644 co-relation queries the response was YES. [2024-06-21 16:21:04,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30384 conditions, 4261 events. 2850/4261 cut-off events. For 262641/262644 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 20675 event pairs, 884 based on Foata normal form. 3/4261 useless extension candidates. Maximal degree in co-relation 30320. Up to 4126 conditions per place. [2024-06-21 16:21:04,314 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 139 selfloop transitions, 16 changer transitions 0/170 dead transitions. [2024-06-21 16:21:04,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 170 transitions, 1575 flow [2024-06-21 16:21:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:21:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:21:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 16:21:04,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-21 16:21:04,315 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 1243 flow. Second operand 6 states and 104 transitions. [2024-06-21 16:21:04,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 170 transitions, 1575 flow [2024-06-21 16:21:04,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 170 transitions, 1519 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 16:21:04,458 INFO L231 Difference]: Finished difference. Result has 139 places, 161 transitions, 1225 flow [2024-06-21 16:21:04,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1225, PETRI_PLACES=139, PETRI_TRANSITIONS=161} [2024-06-21 16:21:04,458 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-21 16:21:04,459 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 161 transitions, 1225 flow [2024-06-21 16:21:04,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:04,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:04,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:04,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:21:04,459 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:04,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2108787459, now seen corresponding path program 1 times [2024-06-21 16:21:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:04,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840801857] [2024-06-21 16:21:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:04,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:05,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:05,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840801857] [2024-06-21 16:21:05,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840801857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:05,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:05,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:05,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177431861] [2024-06-21 16:21:05,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:05,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:05,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:05,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:05,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 161 transitions, 1225 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:05,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:05,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:05,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:06,382 INFO L124 PetriNetUnfolderBase]: 2784/4190 cut-off events. [2024-06-21 16:21:06,382 INFO L125 PetriNetUnfolderBase]: For 275176/275176 co-relation queries the response was YES. [2024-06-21 16:21:06,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30224 conditions, 4190 events. 2784/4190 cut-off events. For 275176/275176 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20485 event pairs, 787 based on Foata normal form. 4/4192 useless extension candidates. Maximal degree in co-relation 30158. Up to 3970 conditions per place. [2024-06-21 16:21:06,411 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 164 selfloop transitions, 21 changer transitions 0/194 dead transitions. [2024-06-21 16:21:06,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 194 transitions, 1723 flow [2024-06-21 16:21:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:21:06,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-21 16:21:06,412 INFO L175 Difference]: Start difference. First operand has 139 places, 161 transitions, 1225 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:21:06,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 194 transitions, 1723 flow [2024-06-21 16:21:06,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 194 transitions, 1675 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:06,570 INFO L231 Difference]: Finished difference. Result has 143 places, 166 transitions, 1294 flow [2024-06-21 16:21:06,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1294, PETRI_PLACES=143, PETRI_TRANSITIONS=166} [2024-06-21 16:21:06,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-21 16:21:06,570 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 166 transitions, 1294 flow [2024-06-21 16:21:06,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:06,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:06,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:06,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:21:06,571 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 16:21:06,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:06,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1794804017, now seen corresponding path program 1 times [2024-06-21 16:21:06,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:06,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713564304] [2024-06-21 16:21:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:06,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:07,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713564304] [2024-06-21 16:21:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713564304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:07,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:07,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635917805] [2024-06-21 16:21:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:07,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:07,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:07,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:07,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 166 transitions, 1294 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:07,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:07,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:07,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:08,406 INFO L124 PetriNetUnfolderBase]: 2644/4040 cut-off events. [2024-06-21 16:21:08,406 INFO L125 PetriNetUnfolderBase]: For 282848/282851 co-relation queries the response was YES. [2024-06-21 16:21:08,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30103 conditions, 4040 events. 2644/4040 cut-off events. For 282848/282851 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 20440 event pairs, 591 based on Foata normal form. 4/4036 useless extension candidates. Maximal degree in co-relation 30036. Up to 3377 conditions per place. [2024-06-21 16:21:08,438 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 138 selfloop transitions, 59 changer transitions 0/208 dead transitions. [2024-06-21 16:21:08,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 208 transitions, 2006 flow [2024-06-21 16:21:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:21:08,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 16:21:08,439 INFO L175 Difference]: Start difference. First operand has 143 places, 166 transitions, 1294 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:21:08,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 208 transitions, 2006 flow [2024-06-21 16:21:08,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 208 transitions, 1933 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:08,585 INFO L231 Difference]: Finished difference. Result has 146 places, 170 transitions, 1422 flow [2024-06-21 16:21:08,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=146, PETRI_TRANSITIONS=170} [2024-06-21 16:21:08,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-21 16:21:08,586 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 170 transitions, 1422 flow [2024-06-21 16:21:08,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:08,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:08,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:08,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:21:08,587 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 16:21:08,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:08,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1173178907, now seen corresponding path program 2 times [2024-06-21 16:21:08,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:08,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624772241] [2024-06-21 16:21:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:08,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:09,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:09,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624772241] [2024-06-21 16:21:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624772241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:09,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:09,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902729941] [2024-06-21 16:21:09,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:09,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:09,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:09,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 170 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:09,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:09,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:09,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:10,470 INFO L124 PetriNetUnfolderBase]: 2697/4122 cut-off events. [2024-06-21 16:21:10,471 INFO L125 PetriNetUnfolderBase]: For 301055/301058 co-relation queries the response was YES. [2024-06-21 16:21:10,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31291 conditions, 4122 events. 2697/4122 cut-off events. For 301055/301058 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20966 event pairs, 734 based on Foata normal form. 4/4118 useless extension candidates. Maximal degree in co-relation 31223. Up to 3589 conditions per place. [2024-06-21 16:21:10,504 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 144 selfloop transitions, 59 changer transitions 0/214 dead transitions. [2024-06-21 16:21:10,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 214 transitions, 2177 flow [2024-06-21 16:21:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:21:10,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-21 16:21:10,505 INFO L175 Difference]: Start difference. First operand has 146 places, 170 transitions, 1422 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:21:10,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 214 transitions, 2177 flow [2024-06-21 16:21:10,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 214 transitions, 2044 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:10,686 INFO L231 Difference]: Finished difference. Result has 150 places, 177 transitions, 1519 flow [2024-06-21 16:21:10,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1519, PETRI_PLACES=150, PETRI_TRANSITIONS=177} [2024-06-21 16:21:10,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-21 16:21:10,687 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 177 transitions, 1519 flow [2024-06-21 16:21:10,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:10,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:10,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:21:10,687 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 16:21:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1794713807, now seen corresponding path program 3 times [2024-06-21 16:21:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267821291] [2024-06-21 16:21:10,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:11,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:11,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267821291] [2024-06-21 16:21:11,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267821291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:11,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:11,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:11,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252731620] [2024-06-21 16:21:11,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:11,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:11,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:11,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:11,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:11,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:11,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 177 transitions, 1519 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:11,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:11,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:11,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:12,611 INFO L124 PetriNetUnfolderBase]: 2706/4137 cut-off events. [2024-06-21 16:21:12,611 INFO L125 PetriNetUnfolderBase]: For 314980/314983 co-relation queries the response was YES. [2024-06-21 16:21:12,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31551 conditions, 4137 events. 2706/4137 cut-off events. For 314980/314983 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 21063 event pairs, 742 based on Foata normal form. 8/4137 useless extension candidates. Maximal degree in co-relation 31481. Up to 3633 conditions per place. [2024-06-21 16:21:12,645 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 146 selfloop transitions, 64 changer transitions 0/221 dead transitions. [2024-06-21 16:21:12,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 221 transitions, 2077 flow [2024-06-21 16:21:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 16:21:12,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-21 16:21:12,646 INFO L175 Difference]: Start difference. First operand has 150 places, 177 transitions, 1519 flow. Second operand 11 states and 214 transitions. [2024-06-21 16:21:12,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 221 transitions, 2077 flow [2024-06-21 16:21:12,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 221 transitions, 2004 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 16:21:12,851 INFO L231 Difference]: Finished difference. Result has 158 places, 179 transitions, 1620 flow [2024-06-21 16:21:12,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1620, PETRI_PLACES=158, PETRI_TRANSITIONS=179} [2024-06-21 16:21:12,852 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 114 predicate places. [2024-06-21 16:21:12,852 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 179 transitions, 1620 flow [2024-06-21 16:21:12,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:12,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:12,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:12,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:21:12,852 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 16:21:12,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1173175032, now seen corresponding path program 1 times [2024-06-21 16:21:12,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:12,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130213913] [2024-06-21 16:21:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:12,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130213913] [2024-06-21 16:21:13,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130213913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:13,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:13,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444182699] [2024-06-21 16:21:13,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:13,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:13,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:13,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:13,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 179 transitions, 1620 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:13,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:13,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:13,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:14,581 INFO L124 PetriNetUnfolderBase]: 2732/4173 cut-off events. [2024-06-21 16:21:14,581 INFO L125 PetriNetUnfolderBase]: For 325983/325986 co-relation queries the response was YES. [2024-06-21 16:21:14,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32295 conditions, 4173 events. 2732/4173 cut-off events. For 325983/325986 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 21302 event pairs, 682 based on Foata normal form. 4/4169 useless extension candidates. Maximal degree in co-relation 32223. Up to 3301 conditions per place. [2024-06-21 16:21:14,617 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 132 selfloop transitions, 86 changer transitions 0/229 dead transitions. [2024-06-21 16:21:14,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 229 transitions, 2638 flow [2024-06-21 16:21:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:14,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 16:21:14,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-21 16:21:14,621 INFO L175 Difference]: Start difference. First operand has 158 places, 179 transitions, 1620 flow. Second operand 9 states and 189 transitions. [2024-06-21 16:21:14,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 229 transitions, 2638 flow [2024-06-21 16:21:14,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 229 transitions, 2494 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:14,828 INFO L231 Difference]: Finished difference. Result has 159 places, 188 transitions, 1848 flow [2024-06-21 16:21:14,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1848, PETRI_PLACES=159, PETRI_TRANSITIONS=188} [2024-06-21 16:21:14,829 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-21 16:21:14,829 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 188 transitions, 1848 flow [2024-06-21 16:21:14,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:14,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:14,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:14,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:21:14,830 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 16:21:14,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:14,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1086333492, now seen corresponding path program 2 times [2024-06-21 16:21:14,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:14,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395077203] [2024-06-21 16:21:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:14,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395077203] [2024-06-21 16:21:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395077203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:15,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:15,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147949341] [2024-06-21 16:21:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:15,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:15,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:15,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:15,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 188 transitions, 1848 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:15,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:15,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:16,645 INFO L124 PetriNetUnfolderBase]: 2756/4211 cut-off events. [2024-06-21 16:21:16,645 INFO L125 PetriNetUnfolderBase]: For 342163/342166 co-relation queries the response was YES. [2024-06-21 16:21:16,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33668 conditions, 4211 events. 2756/4211 cut-off events. For 342163/342166 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21603 event pairs, 663 based on Foata normal form. 4/4209 useless extension candidates. Maximal degree in co-relation 33594. Up to 3529 conditions per place. [2024-06-21 16:21:16,681 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 145 selfloop transitions, 71 changer transitions 0/227 dead transitions. [2024-06-21 16:21:16,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 227 transitions, 2608 flow [2024-06-21 16:21:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:16,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:21:16,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-21 16:21:16,682 INFO L175 Difference]: Start difference. First operand has 159 places, 188 transitions, 1848 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:21:16,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 227 transitions, 2608 flow [2024-06-21 16:21:16,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 227 transitions, 2528 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-21 16:21:16,882 INFO L231 Difference]: Finished difference. Result has 164 places, 191 transitions, 1974 flow [2024-06-21 16:21:16,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1974, PETRI_PLACES=164, PETRI_TRANSITIONS=191} [2024-06-21 16:21:16,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-21 16:21:16,882 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 191 transitions, 1974 flow [2024-06-21 16:21:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:16,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:16,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:16,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:21:16,883 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 16:21:16,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:16,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1790994582, now seen corresponding path program 3 times [2024-06-21 16:21:16,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:16,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434682567] [2024-06-21 16:21:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:16,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:17,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:17,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434682567] [2024-06-21 16:21:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434682567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:17,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:17,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461420087] [2024-06-21 16:21:17,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:17,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:17,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:17,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 191 transitions, 1974 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:17,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:17,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:17,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:18,751 INFO L124 PetriNetUnfolderBase]: 2789/4264 cut-off events. [2024-06-21 16:21:18,752 INFO L125 PetriNetUnfolderBase]: For 358019/358022 co-relation queries the response was YES. [2024-06-21 16:21:18,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34572 conditions, 4264 events. 2789/4264 cut-off events. For 358019/358022 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21990 event pairs, 663 based on Foata normal form. 4/4262 useless extension candidates. Maximal degree in co-relation 34496. Up to 3550 conditions per place. [2024-06-21 16:21:18,787 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 147 selfloop transitions, 76 changer transitions 0/234 dead transitions. [2024-06-21 16:21:18,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 234 transitions, 2784 flow [2024-06-21 16:21:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 16:21:18,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4806201550387597 [2024-06-21 16:21:18,789 INFO L175 Difference]: Start difference. First operand has 164 places, 191 transitions, 1974 flow. Second operand 9 states and 186 transitions. [2024-06-21 16:21:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 234 transitions, 2784 flow [2024-06-21 16:21:19,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 234 transitions, 2614 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:19,129 INFO L231 Difference]: Finished difference. Result has 167 places, 197 transitions, 2062 flow [2024-06-21 16:21:19,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2062, PETRI_PLACES=167, PETRI_TRANSITIONS=197} [2024-06-21 16:21:19,130 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-21 16:21:19,130 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 197 transitions, 2062 flow [2024-06-21 16:21:19,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:19,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:19,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:19,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:21:19,130 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 16:21:19,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:19,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1086483222, now seen corresponding path program 4 times [2024-06-21 16:21:19,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:19,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957385957] [2024-06-21 16:21:19,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:19,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:20,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957385957] [2024-06-21 16:21:20,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957385957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:20,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:20,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:20,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678276353] [2024-06-21 16:21:20,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:20,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:20,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:20,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:20,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 197 transitions, 2062 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:20,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:20,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:20,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:21,067 INFO L124 PetriNetUnfolderBase]: 2811/4301 cut-off events. [2024-06-21 16:21:21,067 INFO L125 PetriNetUnfolderBase]: For 373461/373464 co-relation queries the response was YES. [2024-06-21 16:21:21,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35176 conditions, 4301 events. 2811/4301 cut-off events. For 373461/373464 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22219 event pairs, 659 based on Foata normal form. 4/4299 useless extension candidates. Maximal degree in co-relation 35098. Up to 3579 conditions per place. [2024-06-21 16:21:21,106 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 149 selfloop transitions, 81 changer transitions 0/241 dead transitions. [2024-06-21 16:21:21,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 241 transitions, 2684 flow [2024-06-21 16:21:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:21,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-21 16:21:21,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:21:21,108 INFO L175 Difference]: Start difference. First operand has 167 places, 197 transitions, 2062 flow. Second operand 11 states and 215 transitions. [2024-06-21 16:21:21,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 241 transitions, 2684 flow [2024-06-21 16:21:21,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 241 transitions, 2558 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:21,455 INFO L231 Difference]: Finished difference. Result has 173 places, 200 transitions, 2174 flow [2024-06-21 16:21:21,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1936, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2174, PETRI_PLACES=173, PETRI_TRANSITIONS=200} [2024-06-21 16:21:21,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-21 16:21:21,455 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 200 transitions, 2174 flow [2024-06-21 16:21:21,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:21,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:21,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:21,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:21:21,456 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 16:21:21,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1086487097, now seen corresponding path program 4 times [2024-06-21 16:21:21,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:21,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524052837] [2024-06-21 16:21:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:21,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:22,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:22,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524052837] [2024-06-21 16:21:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524052837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:22,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:22,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:22,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953986606] [2024-06-21 16:21:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:22,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:22,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:22,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:22,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 200 transitions, 2174 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:22,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:22,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:22,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:23,431 INFO L124 PetriNetUnfolderBase]: 2826/4327 cut-off events. [2024-06-21 16:21:23,431 INFO L125 PetriNetUnfolderBase]: For 389305/389308 co-relation queries the response was YES. [2024-06-21 16:21:23,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35681 conditions, 4327 events. 2826/4327 cut-off events. For 389305/389308 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 22346 event pairs, 729 based on Foata normal form. 4/4323 useless extension candidates. Maximal degree in co-relation 35602. Up to 3850 conditions per place. [2024-06-21 16:21:23,471 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 174 selfloop transitions, 49 changer transitions 0/234 dead transitions. [2024-06-21 16:21:23,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 234 transitions, 2736 flow [2024-06-21 16:21:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:21:23,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-21 16:21:23,473 INFO L175 Difference]: Start difference. First operand has 173 places, 200 transitions, 2174 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:21:23,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 234 transitions, 2736 flow [2024-06-21 16:21:23,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 234 transitions, 2506 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:23,761 INFO L231 Difference]: Finished difference. Result has 172 places, 202 transitions, 2089 flow [2024-06-21 16:21:23,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2089, PETRI_PLACES=172, PETRI_TRANSITIONS=202} [2024-06-21 16:21:23,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 128 predicate places. [2024-06-21 16:21:23,761 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 202 transitions, 2089 flow [2024-06-21 16:21:23,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:23,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:23,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:23,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:21:23,762 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:23,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1872389431, now seen corresponding path program 1 times [2024-06-21 16:21:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:23,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4357853] [2024-06-21 16:21:23,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:23,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:24,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4357853] [2024-06-21 16:21:24,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4357853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:24,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:24,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074197546] [2024-06-21 16:21:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:24,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:24,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:24,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 202 transitions, 2089 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:24,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:24,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:24,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:25,171 INFO L124 PetriNetUnfolderBase]: 3083/4617 cut-off events. [2024-06-21 16:21:25,171 INFO L125 PetriNetUnfolderBase]: For 379056/379059 co-relation queries the response was YES. [2024-06-21 16:21:25,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36623 conditions, 4617 events. 3083/4617 cut-off events. For 379056/379059 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22841 event pairs, 847 based on Foata normal form. 4/4618 useless extension candidates. Maximal degree in co-relation 36543. Up to 4309 conditions per place. [2024-06-21 16:21:25,214 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 176 selfloop transitions, 39 changer transitions 0/238 dead transitions. [2024-06-21 16:21:25,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 238 transitions, 2917 flow [2024-06-21 16:21:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:25,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:21:25,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-21 16:21:25,215 INFO L175 Difference]: Start difference. First operand has 172 places, 202 transitions, 2089 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:21:25,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 238 transitions, 2917 flow [2024-06-21 16:21:25,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 238 transitions, 2797 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:25,539 INFO L231 Difference]: Finished difference. Result has 174 places, 214 transitions, 2236 flow [2024-06-21 16:21:25,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2236, PETRI_PLACES=174, PETRI_TRANSITIONS=214} [2024-06-21 16:21:25,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-21 16:21:25,539 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 214 transitions, 2236 flow [2024-06-21 16:21:25,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:25,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:25,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:25,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:21:25,540 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 16:21:25,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:25,541 INFO L85 PathProgramCache]: Analyzing trace with hash 421385863, now seen corresponding path program 5 times [2024-06-21 16:21:25,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:25,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232564375] [2024-06-21 16:21:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:25,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:26,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232564375] [2024-06-21 16:21:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232564375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361601650] [2024-06-21 16:21:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:26,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:26,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:26,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:26,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:26,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 214 transitions, 2236 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:26,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:26,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:26,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:27,418 INFO L124 PetriNetUnfolderBase]: 2879/4397 cut-off events. [2024-06-21 16:21:27,419 INFO L125 PetriNetUnfolderBase]: For 392230/392233 co-relation queries the response was YES. [2024-06-21 16:21:27,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36363 conditions, 4397 events. 2879/4397 cut-off events. For 392230/392233 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22676 event pairs, 585 based on Foata normal form. 4/4398 useless extension candidates. Maximal degree in co-relation 36281. Up to 3841 conditions per place. [2024-06-21 16:21:27,458 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 185 selfloop transitions, 57 changer transitions 0/256 dead transitions. [2024-06-21 16:21:27,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 256 transitions, 3038 flow [2024-06-21 16:21:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 16:21:27,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-21 16:21:27,459 INFO L175 Difference]: Start difference. First operand has 174 places, 214 transitions, 2236 flow. Second operand 9 states and 187 transitions. [2024-06-21 16:21:27,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 256 transitions, 3038 flow [2024-06-21 16:21:27,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 256 transitions, 2966 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 16:21:27,911 INFO L231 Difference]: Finished difference. Result has 181 places, 216 transitions, 2325 flow [2024-06-21 16:21:27,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2325, PETRI_PLACES=181, PETRI_TRANSITIONS=216} [2024-06-21 16:21:27,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-21 16:21:27,912 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 216 transitions, 2325 flow [2024-06-21 16:21:27,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:27,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:27,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:27,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:21:27,912 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 16:21:27,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:27,913 INFO L85 PathProgramCache]: Analyzing trace with hash 421389738, now seen corresponding path program 5 times [2024-06-21 16:21:27,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:27,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709080625] [2024-06-21 16:21:27,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:27,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:28,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709080625] [2024-06-21 16:21:28,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709080625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:28,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:28,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:28,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754647741] [2024-06-21 16:21:28,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:28,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:28,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:28,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:28,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 216 transitions, 2325 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:28,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:28,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:28,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:29,768 INFO L124 PetriNetUnfolderBase]: 2912/4450 cut-off events. [2024-06-21 16:21:29,768 INFO L125 PetriNetUnfolderBase]: For 407353/407356 co-relation queries the response was YES. [2024-06-21 16:21:29,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37041 conditions, 4450 events. 2912/4450 cut-off events. For 407353/407356 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23029 event pairs, 690 based on Foata normal form. 4/4451 useless extension candidates. Maximal degree in co-relation 36957. Up to 3601 conditions per place. [2024-06-21 16:21:29,810 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 163 selfloop transitions, 94 changer transitions 0/271 dead transitions. [2024-06-21 16:21:29,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 271 transitions, 3646 flow [2024-06-21 16:21:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:29,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:29,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 16:21:29,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116279069767442 [2024-06-21 16:21:29,811 INFO L175 Difference]: Start difference. First operand has 181 places, 216 transitions, 2325 flow. Second operand 9 states and 198 transitions. [2024-06-21 16:21:29,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 271 transitions, 3646 flow [2024-06-21 16:21:30,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 271 transitions, 3426 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:30,222 INFO L231 Difference]: Finished difference. Result has 184 places, 225 transitions, 2487 flow [2024-06-21 16:21:30,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2487, PETRI_PLACES=184, PETRI_TRANSITIONS=225} [2024-06-21 16:21:30,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 140 predicate places. [2024-06-21 16:21:30,223 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 225 transitions, 2487 flow [2024-06-21 16:21:30,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:30,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:30,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:30,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:21:30,223 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 16:21:30,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 421389583, now seen corresponding path program 6 times [2024-06-21 16:21:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:30,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264939710] [2024-06-21 16:21:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:30,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:31,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:31,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264939710] [2024-06-21 16:21:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264939710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:31,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:31,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124560265] [2024-06-21 16:21:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:31,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:31,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:31,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:31,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 225 transitions, 2487 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:31,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:31,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:31,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:32,080 INFO L124 PetriNetUnfolderBase]: 2929/4477 cut-off events. [2024-06-21 16:21:32,080 INFO L125 PetriNetUnfolderBase]: For 425047/425050 co-relation queries the response was YES. [2024-06-21 16:21:32,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37742 conditions, 4477 events. 2929/4477 cut-off events. For 425047/425050 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23210 event pairs, 736 based on Foata normal form. 4/4473 useless extension candidates. Maximal degree in co-relation 37656. Up to 3999 conditions per place. [2024-06-21 16:21:32,198 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 56 changer transitions 0/264 dead transitions. [2024-06-21 16:21:32,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 264 transitions, 3117 flow [2024-06-21 16:21:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:32,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 16:21:32,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-21 16:21:32,200 INFO L175 Difference]: Start difference. First operand has 184 places, 225 transitions, 2487 flow. Second operand 9 states and 183 transitions. [2024-06-21 16:21:32,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 264 transitions, 3117 flow [2024-06-21 16:21:32,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 264 transitions, 2957 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:21:32,617 INFO L231 Difference]: Finished difference. Result has 189 places, 227 transitions, 2486 flow [2024-06-21 16:21:32,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2486, PETRI_PLACES=189, PETRI_TRANSITIONS=227} [2024-06-21 16:21:32,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-21 16:21:32,617 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 227 transitions, 2486 flow [2024-06-21 16:21:32,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:32,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:32,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:32,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:21:32,618 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 16:21:32,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash 421533733, now seen corresponding path program 7 times [2024-06-21 16:21:32,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:32,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213988542] [2024-06-21 16:21:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:32,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:33,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:33,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213988542] [2024-06-21 16:21:33,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213988542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:33,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:33,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:33,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814061967] [2024-06-21 16:21:33,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:33,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:33,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:33,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:33,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:33,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 227 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:33,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:33,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:33,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:34,630 INFO L124 PetriNetUnfolderBase]: 2946/4504 cut-off events. [2024-06-21 16:21:34,630 INFO L125 PetriNetUnfolderBase]: For 441183/441186 co-relation queries the response was YES. [2024-06-21 16:21:34,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38024 conditions, 4504 events. 2946/4504 cut-off events. For 441183/441186 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23442 event pairs, 736 based on Foata normal form. 4/4500 useless extension candidates. Maximal degree in co-relation 37937. Up to 4077 conditions per place. [2024-06-21 16:21:34,675 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 205 selfloop transitions, 44 changer transitions 0/263 dead transitions. [2024-06-21 16:21:34,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 263 transitions, 3110 flow [2024-06-21 16:21:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:21:34,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-21 16:21:34,677 INFO L175 Difference]: Start difference. First operand has 189 places, 227 transitions, 2486 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:21:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 263 transitions, 3110 flow [2024-06-21 16:21:35,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 263 transitions, 2984 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:35,077 INFO L231 Difference]: Finished difference. Result has 191 places, 229 transitions, 2499 flow [2024-06-21 16:21:35,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2499, PETRI_PLACES=191, PETRI_TRANSITIONS=229} [2024-06-21 16:21:35,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-21 16:21:35,077 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 229 transitions, 2499 flow [2024-06-21 16:21:35,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:35,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:35,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:35,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:21:35,078 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 16:21:35,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:35,078 INFO L85 PathProgramCache]: Analyzing trace with hash 421533888, now seen corresponding path program 6 times [2024-06-21 16:21:35,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:35,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726257714] [2024-06-21 16:21:35,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:36,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:36,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:36,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726257714] [2024-06-21 16:21:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726257714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:36,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63938468] [2024-06-21 16:21:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:36,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:36,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:36,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:36,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 229 transitions, 2499 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:36,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:36,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:36,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:37,005 INFO L124 PetriNetUnfolderBase]: 3000/4582 cut-off events. [2024-06-21 16:21:37,005 INFO L125 PetriNetUnfolderBase]: For 463137/463140 co-relation queries the response was YES. [2024-06-21 16:21:37,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38921 conditions, 4582 events. 3000/4582 cut-off events. For 463137/463140 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 23889 event pairs, 688 based on Foata normal form. 4/4583 useless extension candidates. Maximal degree in co-relation 38834. Up to 3856 conditions per place. [2024-06-21 16:21:37,053 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 180 selfloop transitions, 85 changer transitions 0/279 dead transitions. [2024-06-21 16:21:37,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 279 transitions, 3823 flow [2024-06-21 16:21:37,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 16:21:37,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2024-06-21 16:21:37,054 INFO L175 Difference]: Start difference. First operand has 191 places, 229 transitions, 2499 flow. Second operand 9 states and 195 transitions. [2024-06-21 16:21:37,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 279 transitions, 3823 flow [2024-06-21 16:21:37,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 279 transitions, 3685 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:37,503 INFO L231 Difference]: Finished difference. Result has 192 places, 235 transitions, 2641 flow [2024-06-21 16:21:37,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2361, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2641, PETRI_PLACES=192, PETRI_TRANSITIONS=235} [2024-06-21 16:21:37,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-21 16:21:37,503 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 235 transitions, 2641 flow [2024-06-21 16:21:37,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:37,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:37,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:37,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:21:37,504 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 16:21:37,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:37,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1807274518, now seen corresponding path program 7 times [2024-06-21 16:21:37,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:37,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247790868] [2024-06-21 16:21:37,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:37,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:38,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:38,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:38,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247790868] [2024-06-21 16:21:38,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247790868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:38,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:38,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:38,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792385409] [2024-06-21 16:21:38,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:38,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:38,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:38,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:38,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:38,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 235 transitions, 2641 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:38,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:38,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:38,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:39,650 INFO L124 PetriNetUnfolderBase]: 2990/4573 cut-off events. [2024-06-21 16:21:39,650 INFO L125 PetriNetUnfolderBase]: For 476006/476009 co-relation queries the response was YES. [2024-06-21 16:21:39,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39162 conditions, 4573 events. 2990/4573 cut-off events. For 476006/476009 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23882 event pairs, 686 based on Foata normal form. 4/4574 useless extension candidates. Maximal degree in co-relation 39074. Up to 3875 conditions per place. [2024-06-21 16:21:39,696 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 185 selfloop transitions, 81 changer transitions 0/280 dead transitions. [2024-06-21 16:21:39,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 280 transitions, 3687 flow [2024-06-21 16:21:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:21:39,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-21 16:21:39,697 INFO L175 Difference]: Start difference. First operand has 192 places, 235 transitions, 2641 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:21:39,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 280 transitions, 3687 flow [2024-06-21 16:21:40,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 280 transitions, 3521 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:40,186 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2645 flow [2024-06-21 16:21:40,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2645, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2024-06-21 16:21:40,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-21 16:21:40,187 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2645 flow [2024-06-21 16:21:40,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:40,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:40,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:40,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:21:40,187 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 16:21:40,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1801917718, now seen corresponding path program 8 times [2024-06-21 16:21:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:40,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148343662] [2024-06-21 16:21:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:40,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:41,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:41,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148343662] [2024-06-21 16:21:41,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148343662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:41,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:41,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:41,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329240339] [2024-06-21 16:21:41,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:41,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:41,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:41,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:41,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:41,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:41,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 2645 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:41,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:41,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:41,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:42,371 INFO L124 PetriNetUnfolderBase]: 3044/4651 cut-off events. [2024-06-21 16:21:42,371 INFO L125 PetriNetUnfolderBase]: For 497695/497698 co-relation queries the response was YES. [2024-06-21 16:21:42,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40344 conditions, 4651 events. 3044/4651 cut-off events. For 497695/497698 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24422 event pairs, 696 based on Foata normal form. 4/4652 useless extension candidates. Maximal degree in co-relation 40254. Up to 3943 conditions per place. [2024-06-21 16:21:42,418 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 196 selfloop transitions, 73 changer transitions 0/283 dead transitions. [2024-06-21 16:21:42,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 283 transitions, 3607 flow [2024-06-21 16:21:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:21:42,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 16:21:42,419 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2645 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:21:42,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 283 transitions, 3607 flow [2024-06-21 16:21:42,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 283 transitions, 3435 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:42,931 INFO L231 Difference]: Finished difference. Result has 199 places, 241 transitions, 2742 flow [2024-06-21 16:21:42,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2742, PETRI_PLACES=199, PETRI_TRANSITIONS=241} [2024-06-21 16:21:42,932 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-21 16:21:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 241 transitions, 2742 flow [2024-06-21 16:21:42,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:42,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:42,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:42,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:21:42,933 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 16:21:42,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:42,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1801917873, now seen corresponding path program 8 times [2024-06-21 16:21:42,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:42,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036670103] [2024-06-21 16:21:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:42,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:44,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:44,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036670103] [2024-06-21 16:21:44,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036670103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:44,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:44,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885764238] [2024-06-21 16:21:44,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:44,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:44,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 241 transitions, 2742 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:44,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:44,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:44,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:45,047 INFO L124 PetriNetUnfolderBase]: 3071/4695 cut-off events. [2024-06-21 16:21:45,047 INFO L125 PetriNetUnfolderBase]: For 520363/520366 co-relation queries the response was YES. [2024-06-21 16:21:45,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41156 conditions, 4695 events. 3071/4695 cut-off events. For 520363/520366 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24728 event pairs, 691 based on Foata normal form. 4/4694 useless extension candidates. Maximal degree in co-relation 41065. Up to 4268 conditions per place. [2024-06-21 16:21:45,093 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 219 selfloop transitions, 41 changer transitions 0/274 dead transitions. [2024-06-21 16:21:45,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 274 transitions, 3384 flow [2024-06-21 16:21:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:21:45,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 16:21:45,094 INFO L175 Difference]: Start difference. First operand has 199 places, 241 transitions, 2742 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:21:45,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 274 transitions, 3384 flow [2024-06-21 16:21:45,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 274 transitions, 3256 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 16:21:45,586 INFO L231 Difference]: Finished difference. Result has 202 places, 243 transitions, 2751 flow [2024-06-21 16:21:45,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2614, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2751, PETRI_PLACES=202, PETRI_TRANSITIONS=243} [2024-06-21 16:21:45,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-21 16:21:45,586 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 243 transitions, 2751 flow [2024-06-21 16:21:45,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:45,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:45,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:45,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:21:45,587 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 16:21:45,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1801710328, now seen corresponding path program 9 times [2024-06-21 16:21:45,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:45,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496928528] [2024-06-21 16:21:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:45,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:46,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:46,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496928528] [2024-06-21 16:21:46,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496928528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:46,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:46,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:46,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473528635] [2024-06-21 16:21:46,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:46,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:46,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 243 transitions, 2751 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:46,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:46,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:46,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:47,816 INFO L124 PetriNetUnfolderBase]: 3051/4659 cut-off events. [2024-06-21 16:21:47,816 INFO L125 PetriNetUnfolderBase]: For 527622/527625 co-relation queries the response was YES. [2024-06-21 16:21:47,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40833 conditions, 4659 events. 3051/4659 cut-off events. For 527622/527625 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 24464 event pairs, 696 based on Foata normal form. 4/4660 useless extension candidates. Maximal degree in co-relation 40740. Up to 3966 conditions per place. [2024-06-21 16:21:47,863 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 193 selfloop transitions, 76 changer transitions 0/283 dead transitions. [2024-06-21 16:21:47,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 283 transitions, 3605 flow [2024-06-21 16:21:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:21:47,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:21:47,865 INFO L175 Difference]: Start difference. First operand has 202 places, 243 transitions, 2751 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:21:47,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 283 transitions, 3605 flow [2024-06-21 16:21:48,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 283 transitions, 3462 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:21:48,482 INFO L231 Difference]: Finished difference. Result has 205 places, 243 transitions, 2768 flow [2024-06-21 16:21:48,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2768, PETRI_PLACES=205, PETRI_TRANSITIONS=243} [2024-06-21 16:21:48,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-21 16:21:48,483 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 243 transitions, 2768 flow [2024-06-21 16:21:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:48,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:48,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:48,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:21:48,484 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:48,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1872376907, now seen corresponding path program 1 times [2024-06-21 16:21:48,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:48,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822566505] [2024-06-21 16:21:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:48,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:49,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822566505] [2024-06-21 16:21:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822566505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:49,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:49,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318050054] [2024-06-21 16:21:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:49,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 243 transitions, 2768 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:49,990 INFO L124 PetriNetUnfolderBase]: 3334/4999 cut-off events. [2024-06-21 16:21:49,990 INFO L125 PetriNetUnfolderBase]: For 558143/558143 co-relation queries the response was YES. [2024-06-21 16:21:50,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43418 conditions, 4999 events. 3334/4999 cut-off events. For 558143/558143 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 25150 event pairs, 887 based on Foata normal form. 3/5000 useless extension candidates. Maximal degree in co-relation 43324. Up to 4750 conditions per place. [2024-06-21 16:21:50,037 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 222 selfloop transitions, 23 changer transitions 0/273 dead transitions. [2024-06-21 16:21:50,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 273 transitions, 3520 flow [2024-06-21 16:21:50,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:50,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:21:50,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-21 16:21:50,038 INFO L175 Difference]: Start difference. First operand has 205 places, 243 transitions, 2768 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:21:50,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 273 transitions, 3520 flow [2024-06-21 16:21:50,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 273 transitions, 3394 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:21:50,583 INFO L231 Difference]: Finished difference. Result has 205 places, 252 transitions, 2812 flow [2024-06-21 16:21:50,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2812, PETRI_PLACES=205, PETRI_TRANSITIONS=252} [2024-06-21 16:21:50,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-21 16:21:50,584 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 252 transitions, 2812 flow [2024-06-21 16:21:50,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:50,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:50,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:50,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:21:50,584 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:50,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:50,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1872377341, now seen corresponding path program 2 times [2024-06-21 16:21:50,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:50,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934446638] [2024-06-21 16:21:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:50,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:51,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:51,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934446638] [2024-06-21 16:21:51,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934446638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:51,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:51,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:21:51,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610121396] [2024-06-21 16:21:51,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:51,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:21:51,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:51,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:21:51,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:21:51,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:51,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 252 transitions, 2812 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:51,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:51,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:51,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:52,229 INFO L124 PetriNetUnfolderBase]: 3358/5035 cut-off events. [2024-06-21 16:21:52,229 INFO L125 PetriNetUnfolderBase]: For 578783/578786 co-relation queries the response was YES. [2024-06-21 16:21:52,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44269 conditions, 5035 events. 3358/5035 cut-off events. For 578783/578786 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 25387 event pairs, 881 based on Foata normal form. 4/5036 useless extension candidates. Maximal degree in co-relation 44173. Up to 4691 conditions per place. [2024-06-21 16:21:52,272 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 208 selfloop transitions, 42 changer transitions 0/278 dead transitions. [2024-06-21 16:21:52,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 278 transitions, 3695 flow [2024-06-21 16:21:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:21:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:21:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:21:52,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 16:21:52,273 INFO L175 Difference]: Start difference. First operand has 205 places, 252 transitions, 2812 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:21:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 278 transitions, 3695 flow [2024-06-21 16:21:52,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 278 transitions, 3647 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 16:21:52,914 INFO L231 Difference]: Finished difference. Result has 211 places, 260 transitions, 2981 flow [2024-06-21 16:21:52,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2981, PETRI_PLACES=211, PETRI_TRANSITIONS=260} [2024-06-21 16:21:52,915 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-21 16:21:52,915 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 260 transitions, 2981 flow [2024-06-21 16:21:52,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:52,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:52,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:52,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:21:52,915 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 16:21:52,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash 689009756, now seen corresponding path program 10 times [2024-06-21 16:21:52,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:52,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158405317] [2024-06-21 16:21:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:53,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:53,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158405317] [2024-06-21 16:21:53,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158405317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:53,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:53,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654297613] [2024-06-21 16:21:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:53,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:53,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:53,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:53,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:53,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 260 transitions, 2981 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:53,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:53,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:53,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:54,865 INFO L124 PetriNetUnfolderBase]: 3134/4782 cut-off events. [2024-06-21 16:21:54,865 INFO L125 PetriNetUnfolderBase]: For 590466/590469 co-relation queries the response was YES. [2024-06-21 16:21:54,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43250 conditions, 4782 events. 3134/4782 cut-off events. For 590466/590469 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25135 event pairs, 743 based on Foata normal form. 6/4780 useless extension candidates. Maximal degree in co-relation 43150. Up to 4387 conditions per place. [2024-06-21 16:21:54,919 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 249 selfloop transitions, 32 changer transitions 0/297 dead transitions. [2024-06-21 16:21:54,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 297 transitions, 4127 flow [2024-06-21 16:21:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:21:54,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-21 16:21:54,920 INFO L175 Difference]: Start difference. First operand has 211 places, 260 transitions, 2981 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:21:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 297 transitions, 4127 flow [2024-06-21 16:21:55,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 297 transitions, 4034 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 16:21:55,668 INFO L231 Difference]: Finished difference. Result has 217 places, 263 transitions, 3027 flow [2024-06-21 16:21:55,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3027, PETRI_PLACES=217, PETRI_TRANSITIONS=263} [2024-06-21 16:21:55,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-21 16:21:55,669 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 263 transitions, 3027 flow [2024-06-21 16:21:55,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:55,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:55,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:55,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:21:55,669 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 16:21:55,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:55,670 INFO L85 PathProgramCache]: Analyzing trace with hash 938637132, now seen corresponding path program 1 times [2024-06-21 16:21:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:55,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136989882] [2024-06-21 16:21:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:56,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136989882] [2024-06-21 16:21:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136989882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:56,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:56,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:56,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102770043] [2024-06-21 16:21:56,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:56,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:56,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:56,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:56,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:56,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:21:56,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 263 transitions, 3027 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:56,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:56,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:21:56,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:57,723 INFO L124 PetriNetUnfolderBase]: 3423/5124 cut-off events. [2024-06-21 16:21:57,723 INFO L125 PetriNetUnfolderBase]: For 617251/617251 co-relation queries the response was YES. [2024-06-21 16:21:57,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45714 conditions, 5124 events. 3423/5124 cut-off events. For 617251/617251 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25795 event pairs, 821 based on Foata normal form. 2/5124 useless extension candidates. Maximal degree in co-relation 45613. Up to 4877 conditions per place. [2024-06-21 16:21:57,776 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 255 selfloop transitions, 25 changer transitions 0/294 dead transitions. [2024-06-21 16:21:57,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 294 transitions, 3705 flow [2024-06-21 16:21:57,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:21:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:21:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:21:57,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-21 16:21:57,777 INFO L175 Difference]: Start difference. First operand has 217 places, 263 transitions, 3027 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:21:57,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 294 transitions, 3705 flow [2024-06-21 16:21:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 294 transitions, 3333 flow, removed 52 selfloop flow, removed 10 redundant places. [2024-06-21 16:21:58,370 INFO L231 Difference]: Finished difference. Result has 216 places, 266 transitions, 2769 flow [2024-06-21 16:21:58,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2667, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2769, PETRI_PLACES=216, PETRI_TRANSITIONS=266} [2024-06-21 16:21:58,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-21 16:21:58,370 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 266 transitions, 2769 flow [2024-06-21 16:21:58,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:58,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:58,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:21:58,371 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 16:21:58,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash -621638248, now seen corresponding path program 11 times [2024-06-21 16:21:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:58,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912981241] [2024-06-21 16:21:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912981241] [2024-06-21 16:21:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912981241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:59,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:59,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:59,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735138538] [2024-06-21 16:21:59,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:59,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:59,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:21:59,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 266 transitions, 2769 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:59,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:59,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:21:59,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:00,597 INFO L124 PetriNetUnfolderBase]: 3180/4857 cut-off events. [2024-06-21 16:22:00,598 INFO L125 PetriNetUnfolderBase]: For 626549/626552 co-relation queries the response was YES. [2024-06-21 16:22:00,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43784 conditions, 4857 events. 3180/4857 cut-off events. For 626549/626552 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25648 event pairs, 685 based on Foata normal form. 6/4858 useless extension candidates. Maximal degree in co-relation 43682. Up to 4359 conditions per place. [2024-06-21 16:22:00,652 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 241 selfloop transitions, 49 changer transitions 0/306 dead transitions. [2024-06-21 16:22:00,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 306 transitions, 3739 flow [2024-06-21 16:22:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:22:00,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:22:00,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 16:22:00,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-21 16:22:00,653 INFO L175 Difference]: Start difference. First operand has 216 places, 266 transitions, 2769 flow. Second operand 10 states and 192 transitions. [2024-06-21 16:22:00,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 306 transitions, 3739 flow [2024-06-21 16:22:01,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 306 transitions, 3685 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:01,280 INFO L231 Difference]: Finished difference. Result has 218 places, 269 transitions, 2893 flow [2024-06-21 16:22:01,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2893, PETRI_PLACES=218, PETRI_TRANSITIONS=269} [2024-06-21 16:22:01,281 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-21 16:22:01,281 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 269 transitions, 2893 flow [2024-06-21 16:22:01,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:01,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:01,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:01,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:22:01,282 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 16:22:01,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash 681652371, now seen corresponding path program 9 times [2024-06-21 16:22:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790245220] [2024-06-21 16:22:01,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:01,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:02,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:02,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790245220] [2024-06-21 16:22:02,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790245220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:02,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:02,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:02,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960827016] [2024-06-21 16:22:02,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:02,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:02,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:02,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:02,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 269 transitions, 2893 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:02,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:02,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:02,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:03,278 INFO L124 PetriNetUnfolderBase]: 3172/4845 cut-off events. [2024-06-21 16:22:03,278 INFO L125 PetriNetUnfolderBase]: For 640238/640241 co-relation queries the response was YES. [2024-06-21 16:22:03,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43986 conditions, 4845 events. 3172/4845 cut-off events. For 640238/640241 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25653 event pairs, 703 based on Foata normal form. 6/4846 useless extension candidates. Maximal degree in co-relation 43883. Up to 4518 conditions per place. [2024-06-21 16:22:03,330 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 260 selfloop transitions, 21 changer transitions 0/297 dead transitions. [2024-06-21 16:22:03,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 297 transitions, 3525 flow [2024-06-21 16:22:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:22:03,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-21 16:22:03,331 INFO L175 Difference]: Start difference. First operand has 218 places, 269 transitions, 2893 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:22:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 297 transitions, 3525 flow [2024-06-21 16:22:03,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 297 transitions, 3353 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:03,933 INFO L231 Difference]: Finished difference. Result has 219 places, 269 transitions, 2770 flow [2024-06-21 16:22:03,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2770, PETRI_PLACES=219, PETRI_TRANSITIONS=269} [2024-06-21 16:22:03,934 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 16:22:03,934 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 269 transitions, 2770 flow [2024-06-21 16:22:03,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:03,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:03,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:22:03,935 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 16:22:03,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 681652526, now seen corresponding path program 12 times [2024-06-21 16:22:03,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:03,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410427522] [2024-06-21 16:22:03,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:03,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:04,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:04,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410427522] [2024-06-21 16:22:04,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410427522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:04,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:04,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550443046] [2024-06-21 16:22:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:04,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:04,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:04,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:04,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:05,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:05,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 269 transitions, 2770 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:05,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:05,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:05,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:05,892 INFO L124 PetriNetUnfolderBase]: 3194/4877 cut-off events. [2024-06-21 16:22:05,893 INFO L125 PetriNetUnfolderBase]: For 659600/659603 co-relation queries the response was YES. [2024-06-21 16:22:05,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44213 conditions, 4877 events. 3194/4877 cut-off events. For 659600/659603 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25785 event pairs, 681 based on Foata normal form. 6/4878 useless extension candidates. Maximal degree in co-relation 44109. Up to 4279 conditions per place. [2024-06-21 16:22:05,951 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 59 changer transitions 0/307 dead transitions. [2024-06-21 16:22:05,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 307 transitions, 3984 flow [2024-06-21 16:22:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:22:05,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-21 16:22:05,953 INFO L175 Difference]: Start difference. First operand has 219 places, 269 transitions, 2770 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:22:05,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 307 transitions, 3984 flow [2024-06-21 16:22:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 307 transitions, 3913 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:06,530 INFO L231 Difference]: Finished difference. Result has 220 places, 272 transitions, 2897 flow [2024-06-21 16:22:06,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2699, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2897, PETRI_PLACES=220, PETRI_TRANSITIONS=272} [2024-06-21 16:22:06,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-21 16:22:06,530 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 272 transitions, 2897 flow [2024-06-21 16:22:06,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:06,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:06,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:06,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:22:06,530 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 16:22:06,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:06,531 INFO L85 PathProgramCache]: Analyzing trace with hash 681859916, now seen corresponding path program 13 times [2024-06-21 16:22:06,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:06,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599502206] [2024-06-21 16:22:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:06,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:07,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:07,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599502206] [2024-06-21 16:22:07,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599502206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:07,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:07,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:07,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881585049] [2024-06-21 16:22:07,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:07,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:07,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:07,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:07,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:07,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 272 transitions, 2897 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:07,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:07,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:07,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:08,761 INFO L124 PetriNetUnfolderBase]: 3184/4863 cut-off events. [2024-06-21 16:22:08,761 INFO L125 PetriNetUnfolderBase]: For 672958/672961 co-relation queries the response was YES. [2024-06-21 16:22:08,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44359 conditions, 4863 events. 3184/4863 cut-off events. For 672958/672961 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25740 event pairs, 686 based on Foata normal form. 6/4864 useless extension candidates. Maximal degree in co-relation 44254. Up to 4365 conditions per place. [2024-06-21 16:22:08,814 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 247 selfloop transitions, 46 changer transitions 0/309 dead transitions. [2024-06-21 16:22:08,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 309 transitions, 3819 flow [2024-06-21 16:22:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:22:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:22:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:22:08,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-21 16:22:08,815 INFO L175 Difference]: Start difference. First operand has 220 places, 272 transitions, 2897 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:22:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 309 transitions, 3819 flow [2024-06-21 16:22:09,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 309 transitions, 3454 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:09,455 INFO L231 Difference]: Finished difference. Result has 221 places, 272 transitions, 2632 flow [2024-06-21 16:22:09,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2632, PETRI_PLACES=221, PETRI_TRANSITIONS=272} [2024-06-21 16:22:09,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 16:22:09,455 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 272 transitions, 2632 flow [2024-06-21 16:22:09,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:09,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:09,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:09,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:22:09,456 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:09,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:09,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1459070027, now seen corresponding path program 2 times [2024-06-21 16:22:09,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:09,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636412088] [2024-06-21 16:22:09,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:09,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:10,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636412088] [2024-06-21 16:22:10,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636412088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:10,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:10,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734835478] [2024-06-21 16:22:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:10,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:10,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:10,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 272 transitions, 2632 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:10,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:10,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:11,005 INFO L124 PetriNetUnfolderBase]: 3465/5192 cut-off events. [2024-06-21 16:22:11,005 INFO L125 PetriNetUnfolderBase]: For 696561/696561 co-relation queries the response was YES. [2024-06-21 16:22:11,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45326 conditions, 5192 events. 3465/5192 cut-off events. For 696561/696561 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26280 event pairs, 888 based on Foata normal form. 3/5193 useless extension candidates. Maximal degree in co-relation 45222. Up to 4967 conditions per place. [2024-06-21 16:22:11,063 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 243 selfloop transitions, 19 changer transitions 0/290 dead transitions. [2024-06-21 16:22:11,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 290 transitions, 3370 flow [2024-06-21 16:22:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:22:11,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-21 16:22:11,072 INFO L175 Difference]: Start difference. First operand has 221 places, 272 transitions, 2632 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:22:11,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 290 transitions, 3370 flow [2024-06-21 16:22:11,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 290 transitions, 3247 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:11,736 INFO L231 Difference]: Finished difference. Result has 219 places, 275 transitions, 2599 flow [2024-06-21 16:22:11,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=219, PETRI_TRANSITIONS=275} [2024-06-21 16:22:11,737 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-21 16:22:11,737 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 275 transitions, 2599 flow [2024-06-21 16:22:11,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:11,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:11,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:11,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:22:11,737 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:11,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:11,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1459070461, now seen corresponding path program 3 times [2024-06-21 16:22:11,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:11,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837716756] [2024-06-21 16:22:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:11,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:12,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837716756] [2024-06-21 16:22:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837716756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:12,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:12,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:12,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694009494] [2024-06-21 16:22:12,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:12,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:12,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:12,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:12,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 275 transitions, 2599 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:12,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:12,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:12,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:13,338 INFO L124 PetriNetUnfolderBase]: 3461/5188 cut-off events. [2024-06-21 16:22:13,339 INFO L125 PetriNetUnfolderBase]: For 709649/709652 co-relation queries the response was YES. [2024-06-21 16:22:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45180 conditions, 5188 events. 3461/5188 cut-off events. For 709649/709652 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26281 event pairs, 890 based on Foata normal form. 4/5189 useless extension candidates. Maximal degree in co-relation 45075. Up to 4954 conditions per place. [2024-06-21 16:22:13,390 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 233 selfloop transitions, 25 changer transitions 0/286 dead transitions. [2024-06-21 16:22:13,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 3273 flow [2024-06-21 16:22:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:13,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:22:13,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 16:22:13,391 INFO L175 Difference]: Start difference. First operand has 219 places, 275 transitions, 2599 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:22:13,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 3273 flow [2024-06-21 16:22:14,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 286 transitions, 3175 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:14,046 INFO L231 Difference]: Finished difference. Result has 221 places, 275 transitions, 2559 flow [2024-06-21 16:22:14,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2501, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2559, PETRI_PLACES=221, PETRI_TRANSITIONS=275} [2024-06-21 16:22:14,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 16:22:14,047 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 275 transitions, 2559 flow [2024-06-21 16:22:14,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:14,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:14,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:14,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:22:14,047 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:14,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1458594797, now seen corresponding path program 3 times [2024-06-21 16:22:14,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:14,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340550178] [2024-06-21 16:22:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:14,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:14,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:14,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340550178] [2024-06-21 16:22:14,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340550178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:14,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:14,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:14,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847528769] [2024-06-21 16:22:14,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:14,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:14,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:14,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:14,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 275 transitions, 2559 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:14,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:14,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:15,575 INFO L124 PetriNetUnfolderBase]: 3452/5175 cut-off events. [2024-06-21 16:22:15,575 INFO L125 PetriNetUnfolderBase]: For 724900/724900 co-relation queries the response was YES. [2024-06-21 16:22:15,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45089 conditions, 5175 events. 3452/5175 cut-off events. For 724900/724900 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26222 event pairs, 884 based on Foata normal form. 3/5176 useless extension candidates. Maximal degree in co-relation 44984. Up to 4967 conditions per place. [2024-06-21 16:22:15,629 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 245 selfloop transitions, 14 changer transitions 0/287 dead transitions. [2024-06-21 16:22:15,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 287 transitions, 3107 flow [2024-06-21 16:22:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:15,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:22:15,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 16:22:15,630 INFO L175 Difference]: Start difference. First operand has 221 places, 275 transitions, 2559 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:22:15,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 287 transitions, 3107 flow [2024-06-21 16:22:16,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 287 transitions, 2949 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:16,371 INFO L231 Difference]: Finished difference. Result has 220 places, 275 transitions, 2435 flow [2024-06-21 16:22:16,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2435, PETRI_PLACES=220, PETRI_TRANSITIONS=275} [2024-06-21 16:22:16,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-21 16:22:16,371 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 275 transitions, 2435 flow [2024-06-21 16:22:16,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:16,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:16,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:16,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:22:16,372 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:16,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:16,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1695240613, now seen corresponding path program 1 times [2024-06-21 16:22:16,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:16,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935827723] [2024-06-21 16:22:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:16,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:17,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:17,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:17,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935827723] [2024-06-21 16:22:17,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935827723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:17,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:17,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:17,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265158362] [2024-06-21 16:22:17,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:17,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:17,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:17,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:22:17,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 275 transitions, 2435 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:17,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:17,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:22:17,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:18,138 INFO L124 PetriNetUnfolderBase]: 3632/5357 cut-off events. [2024-06-21 16:22:18,138 INFO L125 PetriNetUnfolderBase]: For 740102/740102 co-relation queries the response was YES. [2024-06-21 16:22:18,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46081 conditions, 5357 events. 3632/5357 cut-off events. For 740102/740102 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 26432 event pairs, 889 based on Foata normal form. 1/5356 useless extension candidates. Maximal degree in co-relation 45977. Up to 5309 conditions per place. [2024-06-21 16:22:18,211 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 271 selfloop transitions, 24 changer transitions 0/298 dead transitions. [2024-06-21 16:22:18,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 3275 flow [2024-06-21 16:22:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:22:18,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:22:18,213 INFO L175 Difference]: Start difference. First operand has 220 places, 275 transitions, 2435 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:22:18,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 3275 flow [2024-06-21 16:22:19,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 298 transitions, 3233 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:19,030 INFO L231 Difference]: Finished difference. Result has 221 places, 281 transitions, 2525 flow [2024-06-21 16:22:19,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2525, PETRI_PLACES=221, PETRI_TRANSITIONS=281} [2024-06-21 16:22:19,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-21 16:22:19,031 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 281 transitions, 2525 flow [2024-06-21 16:22:19,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:19,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:19,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:19,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:22:19,031 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:19,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1695060875, now seen corresponding path program 1 times [2024-06-21 16:22:19,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:19,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731362613] [2024-06-21 16:22:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:19,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:19,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731362613] [2024-06-21 16:22:19,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731362613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:19,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:19,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:19,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208219597] [2024-06-21 16:22:19,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:19,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:19,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:19,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:19,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:19,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:19,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 281 transitions, 2525 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:19,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:19,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:19,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:20,697 INFO L124 PetriNetUnfolderBase]: 3484/5215 cut-off events. [2024-06-21 16:22:20,697 INFO L125 PetriNetUnfolderBase]: For 766463/766463 co-relation queries the response was YES. [2024-06-21 16:22:20,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45965 conditions, 5215 events. 3484/5215 cut-off events. For 766463/766463 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26287 event pairs, 881 based on Foata normal form. 3/5216 useless extension candidates. Maximal degree in co-relation 45860. Up to 4952 conditions per place. [2024-06-21 16:22:20,756 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 251 selfloop transitions, 25 changer transitions 0/306 dead transitions. [2024-06-21 16:22:20,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 306 transitions, 3343 flow [2024-06-21 16:22:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 16:22:20,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:22:20,757 INFO L175 Difference]: Start difference. First operand has 221 places, 281 transitions, 2525 flow. Second operand 7 states and 129 transitions. [2024-06-21 16:22:20,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 306 transitions, 3343 flow [2024-06-21 16:22:21,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 306 transitions, 3287 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:21,522 INFO L231 Difference]: Finished difference. Result has 225 places, 287 transitions, 2611 flow [2024-06-21 16:22:21,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2611, PETRI_PLACES=225, PETRI_TRANSITIONS=287} [2024-06-21 16:22:21,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-21 16:22:21,522 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 287 transitions, 2611 flow [2024-06-21 16:22:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:21,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:21,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:22:21,523 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:21,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1695061123, now seen corresponding path program 2 times [2024-06-21 16:22:21,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:21,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994301134] [2024-06-21 16:22:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:21,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:22,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994301134] [2024-06-21 16:22:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994301134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:22,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823975330] [2024-06-21 16:22:22,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:22,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:22,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:22,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:22:22,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 287 transitions, 2611 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:22,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:22,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:22:22,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:23,260 INFO L124 PetriNetUnfolderBase]: 3652/5385 cut-off events. [2024-06-21 16:22:23,260 INFO L125 PetriNetUnfolderBase]: For 784587/784587 co-relation queries the response was YES. [2024-06-21 16:22:23,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47621 conditions, 5385 events. 3652/5385 cut-off events. For 784587/784587 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26562 event pairs, 888 based on Foata normal form. 1/5384 useless extension candidates. Maximal degree in co-relation 47514. Up to 5336 conditions per place. [2024-06-21 16:22:23,321 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 275 selfloop transitions, 26 changer transitions 0/304 dead transitions. [2024-06-21 16:22:23,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 304 transitions, 3421 flow [2024-06-21 16:22:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:22:23,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 16:22:23,322 INFO L175 Difference]: Start difference. First operand has 225 places, 287 transitions, 2611 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:22:23,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 304 transitions, 3421 flow [2024-06-21 16:22:24,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 304 transitions, 3369 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:22:24,331 INFO L231 Difference]: Finished difference. Result has 229 places, 290 transitions, 2651 flow [2024-06-21 16:22:24,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2651, PETRI_PLACES=229, PETRI_TRANSITIONS=290} [2024-06-21 16:22:24,332 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-21 16:22:24,332 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 290 transitions, 2651 flow [2024-06-21 16:22:24,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:24,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:24,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:24,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:22:24,332 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:24,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash -800194831, now seen corresponding path program 2 times [2024-06-21 16:22:24,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:24,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405451472] [2024-06-21 16:22:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:24,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:24,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:24,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405451472] [2024-06-21 16:22:24,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405451472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:24,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:24,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:24,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664723693] [2024-06-21 16:22:24,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:24,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:24,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:24,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 290 transitions, 2651 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:24,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:24,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:24,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:26,132 INFO L124 PetriNetUnfolderBase]: 3504/5244 cut-off events. [2024-06-21 16:22:26,132 INFO L125 PetriNetUnfolderBase]: For 810354/810357 co-relation queries the response was YES. [2024-06-21 16:22:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47132 conditions, 5244 events. 3504/5244 cut-off events. For 810354/810357 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26457 event pairs, 883 based on Foata normal form. 5/5246 useless extension candidates. Maximal degree in co-relation 47023. Up to 4971 conditions per place. [2024-06-21 16:22:26,186 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 248 selfloop transitions, 29 changer transitions 0/308 dead transitions. [2024-06-21 16:22:26,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 308 transitions, 3429 flow [2024-06-21 16:22:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:22:26,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-21 16:22:26,187 INFO L175 Difference]: Start difference. First operand has 229 places, 290 transitions, 2651 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:22:26,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 308 transitions, 3429 flow [2024-06-21 16:22:26,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 308 transitions, 3371 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:26,999 INFO L231 Difference]: Finished difference. Result has 232 places, 293 transitions, 2702 flow [2024-06-21 16:22:26,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=232, PETRI_TRANSITIONS=293} [2024-06-21 16:22:27,000 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-21 16:22:27,000 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 293 transitions, 2702 flow [2024-06-21 16:22:27,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:27,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:27,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:22:27,000 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:27,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1458885763, now seen corresponding path program 3 times [2024-06-21 16:22:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30190324] [2024-06-21 16:22:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:27,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30190324] [2024-06-21 16:22:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30190324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:27,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:27,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:27,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900425301] [2024-06-21 16:22:27,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:27,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:27,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:27,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:22:27,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 293 transitions, 2702 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:27,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:27,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:22:27,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:28,818 INFO L124 PetriNetUnfolderBase]: 3664/5403 cut-off events. [2024-06-21 16:22:28,819 INFO L125 PetriNetUnfolderBase]: For 824936/824939 co-relation queries the response was YES. [2024-06-21 16:22:28,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48288 conditions, 5403 events. 3664/5403 cut-off events. For 824936/824939 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26635 event pairs, 897 based on Foata normal form. 1/5401 useless extension candidates. Maximal degree in co-relation 48178. Up to 5354 conditions per place. [2024-06-21 16:22:28,867 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 274 selfloop transitions, 26 changer transitions 0/303 dead transitions. [2024-06-21 16:22:28,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 3326 flow [2024-06-21 16:22:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:28,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:22:28,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3754152823920266 [2024-06-21 16:22:28,868 INFO L175 Difference]: Start difference. First operand has 232 places, 293 transitions, 2702 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:22:28,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 3326 flow [2024-06-21 16:22:29,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 303 transitions, 3231 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:29,665 INFO L231 Difference]: Finished difference. Result has 235 places, 293 transitions, 2665 flow [2024-06-21 16:22:29,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2607, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2665, PETRI_PLACES=235, PETRI_TRANSITIONS=293} [2024-06-21 16:22:29,666 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 16:22:29,666 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 293 transitions, 2665 flow [2024-06-21 16:22:29,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:29,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:29,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:29,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:22:29,667 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:29,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1458885515, now seen corresponding path program 3 times [2024-06-21 16:22:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:29,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889934698] [2024-06-21 16:22:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:30,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889934698] [2024-06-21 16:22:30,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889934698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:30,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:30,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:22:30,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031498847] [2024-06-21 16:22:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:30,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:22:30,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:30,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:22:30,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:22:30,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:30,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 293 transitions, 2665 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:30,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:30,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:30,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:31,422 INFO L124 PetriNetUnfolderBase]: 3492/5228 cut-off events. [2024-06-21 16:22:31,423 INFO L125 PetriNetUnfolderBase]: For 842385/842388 co-relation queries the response was YES. [2024-06-21 16:22:31,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47214 conditions, 5228 events. 3492/5228 cut-off events. For 842385/842388 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 26453 event pairs, 881 based on Foata normal form. 5/5230 useless extension candidates. Maximal degree in co-relation 47103. Up to 4961 conditions per place. [2024-06-21 16:22:31,484 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 250 selfloop transitions, 28 changer transitions 0/309 dead transitions. [2024-06-21 16:22:31,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 309 transitions, 3263 flow [2024-06-21 16:22:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:22:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:22:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 16:22:31,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-21 16:22:31,485 INFO L175 Difference]: Start difference. First operand has 235 places, 293 transitions, 2665 flow. Second operand 7 states and 125 transitions. [2024-06-21 16:22:31,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 309 transitions, 3263 flow [2024-06-21 16:22:32,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 309 transitions, 3161 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:32,297 INFO L231 Difference]: Finished difference. Result has 235 places, 293 transitions, 2625 flow [2024-06-21 16:22:32,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2625, PETRI_PLACES=235, PETRI_TRANSITIONS=293} [2024-06-21 16:22:32,297 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-21 16:22:32,297 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 293 transitions, 2625 flow [2024-06-21 16:22:32,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:32,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:32,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:32,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:22:32,297 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:32,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:32,298 INFO L85 PathProgramCache]: Analyzing trace with hash 864796252, now seen corresponding path program 1 times [2024-06-21 16:22:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010842610] [2024-06-21 16:22:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:33,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:33,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010842610] [2024-06-21 16:22:33,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010842610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:33,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:33,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722752733] [2024-06-21 16:22:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:33,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:33,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:33,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 293 transitions, 2625 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:33,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:33,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:33,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:34,506 INFO L124 PetriNetUnfolderBase]: 3365/5150 cut-off events. [2024-06-21 16:22:34,506 INFO L125 PetriNetUnfolderBase]: For 922533/922536 co-relation queries the response was YES. [2024-06-21 16:22:34,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48165 conditions, 5150 events. 3365/5150 cut-off events. For 922533/922536 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27721 event pairs, 476 based on Foata normal form. 16/5152 useless extension candidates. Maximal degree in co-relation 48053. Up to 3176 conditions per place. [2024-06-21 16:22:34,567 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 143 changer transitions 0/349 dead transitions. [2024-06-21 16:22:34,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 349 transitions, 4025 flow [2024-06-21 16:22:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:22:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:22:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 16:22:34,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2024-06-21 16:22:34,573 INFO L175 Difference]: Start difference. First operand has 235 places, 293 transitions, 2625 flow. Second operand 10 states and 213 transitions. [2024-06-21 16:22:34,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 349 transitions, 4025 flow [2024-06-21 16:22:35,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 349 transitions, 3944 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:22:35,454 INFO L231 Difference]: Finished difference. Result has 238 places, 295 transitions, 2902 flow [2024-06-21 16:22:35,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2544, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2902, PETRI_PLACES=238, PETRI_TRANSITIONS=295} [2024-06-21 16:22:35,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-21 16:22:35,454 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 295 transitions, 2902 flow [2024-06-21 16:22:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:35,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:35,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:35,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:22:35,455 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:35,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:35,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1635049366, now seen corresponding path program 2 times [2024-06-21 16:22:35,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:35,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220012420] [2024-06-21 16:22:35,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:35,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:36,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:36,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220012420] [2024-06-21 16:22:36,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220012420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:36,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:36,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978544417] [2024-06-21 16:22:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:36,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:36,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 295 transitions, 2902 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:36,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:36,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:36,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:38,095 INFO L124 PetriNetUnfolderBase]: 3661/5641 cut-off events. [2024-06-21 16:22:38,095 INFO L125 PetriNetUnfolderBase]: For 1044649/1044652 co-relation queries the response was YES. [2024-06-21 16:22:38,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54604 conditions, 5641 events. 3661/5641 cut-off events. For 1044649/1044652 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 31242 event pairs, 726 based on Foata normal form. 16/5639 useless extension candidates. Maximal degree in co-relation 54491. Up to 3939 conditions per place. [2024-06-21 16:22:38,159 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 204 selfloop transitions, 137 changer transitions 0/360 dead transitions. [2024-06-21 16:22:38,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 360 transitions, 4173 flow [2024-06-21 16:22:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-21 16:22:38,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49682875264270615 [2024-06-21 16:22:38,160 INFO L175 Difference]: Start difference. First operand has 238 places, 295 transitions, 2902 flow. Second operand 11 states and 235 transitions. [2024-06-21 16:22:38,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 360 transitions, 4173 flow [2024-06-21 16:22:39,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 360 transitions, 3983 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:39,221 INFO L231 Difference]: Finished difference. Result has 245 places, 302 transitions, 3221 flow [2024-06-21 16:22:39,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3221, PETRI_PLACES=245, PETRI_TRANSITIONS=302} [2024-06-21 16:22:39,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 201 predicate places. [2024-06-21 16:22:39,222 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 302 transitions, 3221 flow [2024-06-21 16:22:39,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:39,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:39,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:39,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:22:39,223 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:39,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash 941694194, now seen corresponding path program 3 times [2024-06-21 16:22:39,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84677551] [2024-06-21 16:22:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:39,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:40,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:40,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84677551] [2024-06-21 16:22:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84677551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:40,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:40,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:40,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690617753] [2024-06-21 16:22:40,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:40,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:40,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:40,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:40,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:40,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 302 transitions, 3221 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:40,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:40,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:40,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:41,530 INFO L124 PetriNetUnfolderBase]: 3726/5766 cut-off events. [2024-06-21 16:22:41,530 INFO L125 PetriNetUnfolderBase]: For 1081235/1081238 co-relation queries the response was YES. [2024-06-21 16:22:41,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56349 conditions, 5766 events. 3726/5766 cut-off events. For 1081235/1081238 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 32348 event pairs, 795 based on Foata normal form. 20/5773 useless extension candidates. Maximal degree in co-relation 56232. Up to 4493 conditions per place. [2024-06-21 16:22:41,595 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 131 changer transitions 0/350 dead transitions. [2024-06-21 16:22:41,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 4320 flow [2024-06-21 16:22:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:22:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:22:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 16:22:41,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-21 16:22:41,596 INFO L175 Difference]: Start difference. First operand has 245 places, 302 transitions, 3221 flow. Second operand 10 states and 207 transitions. [2024-06-21 16:22:41,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 4320 flow [2024-06-21 16:22:42,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 350 transitions, 4182 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:22:42,634 INFO L231 Difference]: Finished difference. Result has 249 places, 303 transitions, 3387 flow [2024-06-21 16:22:42,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3387, PETRI_PLACES=249, PETRI_TRANSITIONS=303} [2024-06-21 16:22:42,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-21 16:22:42,635 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 303 transitions, 3387 flow [2024-06-21 16:22:42,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:42,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:42,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:42,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:22:42,635 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:42,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:42,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1634934046, now seen corresponding path program 4 times [2024-06-21 16:22:42,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:42,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774780341] [2024-06-21 16:22:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:42,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:43,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:43,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774780341] [2024-06-21 16:22:43,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774780341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:43,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:43,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:43,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167346896] [2024-06-21 16:22:43,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:43,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:43,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:43,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:43,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:43,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:43,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 303 transitions, 3387 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:43,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:43,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:43,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:45,185 INFO L124 PetriNetUnfolderBase]: 3794/5874 cut-off events. [2024-06-21 16:22:45,185 INFO L125 PetriNetUnfolderBase]: For 1106845/1106848 co-relation queries the response was YES. [2024-06-21 16:22:45,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57842 conditions, 5874 events. 3794/5874 cut-off events. For 1106845/1106848 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 33116 event pairs, 766 based on Foata normal form. 16/5872 useless extension candidates. Maximal degree in co-relation 57723. Up to 4159 conditions per place. [2024-06-21 16:22:45,255 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 211 selfloop transitions, 135 changer transitions 0/365 dead transitions. [2024-06-21 16:22:45,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 365 transitions, 4574 flow [2024-06-21 16:22:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:22:45,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:22:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-21 16:22:45,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4844961240310077 [2024-06-21 16:22:45,256 INFO L175 Difference]: Start difference. First operand has 249 places, 303 transitions, 3387 flow. Second operand 12 states and 250 transitions. [2024-06-21 16:22:45,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 365 transitions, 4574 flow [2024-06-21 16:22:46,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 365 transitions, 4301 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:46,510 INFO L231 Difference]: Finished difference. Result has 253 places, 304 transitions, 3426 flow [2024-06-21 16:22:46,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3426, PETRI_PLACES=253, PETRI_TRANSITIONS=304} [2024-06-21 16:22:46,511 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-21 16:22:46,511 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 304 transitions, 3426 flow [2024-06-21 16:22:46,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:46,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:46,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:22:46,511 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:46,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2074417500, now seen corresponding path program 1 times [2024-06-21 16:22:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:46,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922992521] [2024-06-21 16:22:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:46,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922992521] [2024-06-21 16:22:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922992521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:47,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:47,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:22:47,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35193885] [2024-06-21 16:22:47,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:47,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:22:47,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:47,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:22:47,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:22:47,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:22:47,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 304 transitions, 3426 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:47,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:47,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:22:47,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:48,851 INFO L124 PetriNetUnfolderBase]: 4116/6265 cut-off events. [2024-06-21 16:22:48,851 INFO L125 PetriNetUnfolderBase]: For 1115946/1115949 co-relation queries the response was YES. [2024-06-21 16:22:48,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60763 conditions, 6265 events. 4116/6265 cut-off events. For 1115946/1115949 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34058 event pairs, 1102 based on Foata normal form. 4/6259 useless extension candidates. Maximal degree in co-relation 60643. Up to 5865 conditions per place. [2024-06-21 16:22:48,931 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 254 selfloop transitions, 59 changer transitions 0/344 dead transitions. [2024-06-21 16:22:48,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 344 transitions, 4568 flow [2024-06-21 16:22:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:22:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:22:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:22:48,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:22:48,932 INFO L175 Difference]: Start difference. First operand has 253 places, 304 transitions, 3426 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:22:48,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 344 transitions, 4568 flow [2024-06-21 16:22:50,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 344 transitions, 4270 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 16:22:50,252 INFO L231 Difference]: Finished difference. Result has 252 places, 312 transitions, 3386 flow [2024-06-21 16:22:50,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3128, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3386, PETRI_PLACES=252, PETRI_TRANSITIONS=312} [2024-06-21 16:22:50,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-21 16:22:50,252 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 312 transitions, 3386 flow [2024-06-21 16:22:50,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:50,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:50,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:50,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:22:50,252 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:50,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:50,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1057158344, now seen corresponding path program 5 times [2024-06-21 16:22:50,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:50,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641346620] [2024-06-21 16:22:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:51,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:51,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641346620] [2024-06-21 16:22:51,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641346620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:51,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:51,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:51,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087642038] [2024-06-21 16:22:51,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:51,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:51,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:51,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:51,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:51,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:51,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 312 transitions, 3386 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:51,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:51,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:51,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:52,922 INFO L124 PetriNetUnfolderBase]: 3870/5991 cut-off events. [2024-06-21 16:22:52,923 INFO L125 PetriNetUnfolderBase]: For 1172390/1172393 co-relation queries the response was YES. [2024-06-21 16:22:52,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57468 conditions, 5991 events. 3870/5991 cut-off events. For 1172390/1172393 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 33862 event pairs, 818 based on Foata normal form. 40/6018 useless extension candidates. Maximal degree in co-relation 57347. Up to 5016 conditions per place. [2024-06-21 16:22:53,005 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 264 selfloop transitions, 71 changer transitions 0/356 dead transitions. [2024-06-21 16:22:53,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 356 transitions, 4227 flow [2024-06-21 16:22:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:22:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:22:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 16:22:53,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4720930232558139 [2024-06-21 16:22:53,007 INFO L175 Difference]: Start difference. First operand has 252 places, 312 transitions, 3386 flow. Second operand 10 states and 203 transitions. [2024-06-21 16:22:53,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 356 transitions, 4227 flow [2024-06-21 16:22:54,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 356 transitions, 4086 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 16:22:54,400 INFO L231 Difference]: Finished difference. Result has 257 places, 313 transitions, 3432 flow [2024-06-21 16:22:54,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3432, PETRI_PLACES=257, PETRI_TRANSITIONS=313} [2024-06-21 16:22:54,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-21 16:22:54,400 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 313 transitions, 3432 flow [2024-06-21 16:22:54,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:54,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:54,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:54,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:22:54,401 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:54,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:54,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1056985364, now seen corresponding path program 6 times [2024-06-21 16:22:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370716309] [2024-06-21 16:22:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:54,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:55,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:55,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370716309] [2024-06-21 16:22:55,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370716309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:55,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:55,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:55,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864724672] [2024-06-21 16:22:55,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:55,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:55,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:55,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:55,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 313 transitions, 3432 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:55,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:55,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:55,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:57,009 INFO L124 PetriNetUnfolderBase]: 3945/6116 cut-off events. [2024-06-21 16:22:57,009 INFO L125 PetriNetUnfolderBase]: For 1154641/1154644 co-relation queries the response was YES. [2024-06-21 16:22:57,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58825 conditions, 6116 events. 3945/6116 cut-off events. For 1154641/1154644 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 34828 event pairs, 828 based on Foata normal form. 20/6123 useless extension candidates. Maximal degree in co-relation 58702. Up to 4994 conditions per place. [2024-06-21 16:22:57,086 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 262 selfloop transitions, 78 changer transitions 0/361 dead transitions. [2024-06-21 16:22:57,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 361 transitions, 4295 flow [2024-06-21 16:22:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-21 16:22:57,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:22:57,087 INFO L175 Difference]: Start difference. First operand has 257 places, 313 transitions, 3432 flow. Second operand 11 states and 220 transitions. [2024-06-21 16:22:57,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 361 transitions, 4295 flow [2024-06-21 16:22:58,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 361 transitions, 4125 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:22:58,566 INFO L231 Difference]: Finished difference. Result has 260 places, 314 transitions, 3468 flow [2024-06-21 16:22:58,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3262, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3468, PETRI_PLACES=260, PETRI_TRANSITIONS=314} [2024-06-21 16:22:58,566 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-21 16:22:58,566 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 314 transitions, 3468 flow [2024-06-21 16:22:58,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:58,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:58,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:58,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:22:58,567 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:58,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1052516714, now seen corresponding path program 7 times [2024-06-21 16:22:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:58,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512671693] [2024-06-21 16:22:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:58,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:59,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:59,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512671693] [2024-06-21 16:22:59,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512671693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:59,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:22:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169524335] [2024-06-21 16:22:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:59,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:22:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:59,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:22:59,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:22:59,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:22:59,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 314 transitions, 3468 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:59,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:59,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:22:59,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:01,037 INFO L124 PetriNetUnfolderBase]: 3901/6052 cut-off events. [2024-06-21 16:23:01,037 INFO L125 PetriNetUnfolderBase]: For 1122035/1122038 co-relation queries the response was YES. [2024-06-21 16:23:01,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57093 conditions, 6052 events. 3901/6052 cut-off events. For 1122035/1122038 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 34428 event pairs, 804 based on Foata normal form. 20/6069 useless extension candidates. Maximal degree in co-relation 56969. Up to 5086 conditions per place. [2024-06-21 16:23:01,115 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 250 selfloop transitions, 88 changer transitions 0/359 dead transitions. [2024-06-21 16:23:01,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 359 transitions, 4564 flow [2024-06-21 16:23:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 16:23:01,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-21 16:23:01,116 INFO L175 Difference]: Start difference. First operand has 260 places, 314 transitions, 3468 flow. Second operand 10 states and 207 transitions. [2024-06-21 16:23:01,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 359 transitions, 4564 flow [2024-06-21 16:23:02,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 359 transitions, 4379 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:02,638 INFO L231 Difference]: Finished difference. Result has 261 places, 314 transitions, 3470 flow [2024-06-21 16:23:02,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3470, PETRI_PLACES=261, PETRI_TRANSITIONS=314} [2024-06-21 16:23:02,638 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-21 16:23:02,638 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 314 transitions, 3470 flow [2024-06-21 16:23:02,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:02,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:02,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:02,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:23:02,639 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:02,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2074746193, now seen corresponding path program 1 times [2024-06-21 16:23:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525414415] [2024-06-21 16:23:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:03,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525414415] [2024-06-21 16:23:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525414415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:03,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174157659] [2024-06-21 16:23:03,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:03,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:03,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:03,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:23:03,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 314 transitions, 3470 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:03,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:03,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:23:03,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:04,860 INFO L124 PetriNetUnfolderBase]: 4318/6582 cut-off events. [2024-06-21 16:23:04,860 INFO L125 PetriNetUnfolderBase]: For 1125704/1125707 co-relation queries the response was YES. [2024-06-21 16:23:04,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60778 conditions, 6582 events. 4318/6582 cut-off events. For 1125704/1125707 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36296 event pairs, 1110 based on Foata normal form. 8/6580 useless extension candidates. Maximal degree in co-relation 60653. Up to 6037 conditions per place. [2024-06-21 16:23:04,935 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 268 selfloop transitions, 65 changer transitions 0/364 dead transitions. [2024-06-21 16:23:04,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 364 transitions, 4766 flow [2024-06-21 16:23:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:23:04,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-21 16:23:04,936 INFO L175 Difference]: Start difference. First operand has 261 places, 314 transitions, 3470 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:23:04,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 364 transitions, 4766 flow [2024-06-21 16:23:06,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 364 transitions, 4519 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-21 16:23:06,427 INFO L231 Difference]: Finished difference. Result has 259 places, 333 transitions, 3667 flow [2024-06-21 16:23:06,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3223, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3667, PETRI_PLACES=259, PETRI_TRANSITIONS=333} [2024-06-21 16:23:06,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 215 predicate places. [2024-06-21 16:23:06,428 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 333 transitions, 3667 flow [2024-06-21 16:23:06,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:06,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:06,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:06,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:23:06,428 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:06,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:06,428 INFO L85 PathProgramCache]: Analyzing trace with hash -195695412, now seen corresponding path program 8 times [2024-06-21 16:23:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018219122] [2024-06-21 16:23:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:07,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:07,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018219122] [2024-06-21 16:23:07,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018219122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:07,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:07,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:07,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393366738] [2024-06-21 16:23:07,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:07,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:07,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:07,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 333 transitions, 3667 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:07,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:07,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:07,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:09,240 INFO L124 PetriNetUnfolderBase]: 4250/6606 cut-off events. [2024-06-21 16:23:09,240 INFO L125 PetriNetUnfolderBase]: For 1268586/1268589 co-relation queries the response was YES. [2024-06-21 16:23:09,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64326 conditions, 6606 events. 4250/6606 cut-off events. For 1268586/1268589 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 38392 event pairs, 710 based on Foata normal form. 16/6619 useless extension candidates. Maximal degree in co-relation 64201. Up to 4855 conditions per place. [2024-06-21 16:23:09,315 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 251 selfloop transitions, 120 changer transitions 0/392 dead transitions. [2024-06-21 16:23:09,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 392 transitions, 4975 flow [2024-06-21 16:23:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 16:23:09,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-06-21 16:23:09,316 INFO L175 Difference]: Start difference. First operand has 259 places, 333 transitions, 3667 flow. Second operand 10 states and 218 transitions. [2024-06-21 16:23:09,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 392 transitions, 4975 flow [2024-06-21 16:23:10,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 392 transitions, 4888 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 16:23:10,760 INFO L231 Difference]: Finished difference. Result has 268 places, 336 transitions, 3968 flow [2024-06-21 16:23:10,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3580, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3968, PETRI_PLACES=268, PETRI_TRANSITIONS=336} [2024-06-21 16:23:10,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 224 predicate places. [2024-06-21 16:23:10,761 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 336 transitions, 3968 flow [2024-06-21 16:23:10,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:10,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:10,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:10,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:23:10,761 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:10,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash -195575442, now seen corresponding path program 9 times [2024-06-21 16:23:10,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:10,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204227240] [2024-06-21 16:23:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:10,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:11,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204227240] [2024-06-21 16:23:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204227240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:11,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595567706] [2024-06-21 16:23:11,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:11,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:11,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:11,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:11,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 336 transitions, 3968 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:11,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:11,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:13,546 INFO L124 PetriNetUnfolderBase]: 4306/6708 cut-off events. [2024-06-21 16:23:13,546 INFO L125 PetriNetUnfolderBase]: For 1301939/1301942 co-relation queries the response was YES. [2024-06-21 16:23:13,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65398 conditions, 6708 events. 4306/6708 cut-off events. For 1301939/1301942 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 39257 event pairs, 929 based on Foata normal form. 20/6725 useless extension candidates. Maximal degree in co-relation 65269. Up to 5536 conditions per place. [2024-06-21 16:23:13,620 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 245 selfloop transitions, 122 changer transitions 0/388 dead transitions. [2024-06-21 16:23:13,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 388 transitions, 5179 flow [2024-06-21 16:23:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 16:23:13,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-06-21 16:23:13,621 INFO L175 Difference]: Start difference. First operand has 268 places, 336 transitions, 3968 flow. Second operand 10 states and 214 transitions. [2024-06-21 16:23:13,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 388 transitions, 5179 flow [2024-06-21 16:23:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 388 transitions, 5012 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:15,253 INFO L231 Difference]: Finished difference. Result has 272 places, 337 transitions, 4089 flow [2024-06-21 16:23:15,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4089, PETRI_PLACES=272, PETRI_TRANSITIONS=337} [2024-06-21 16:23:15,253 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 228 predicate places. [2024-06-21 16:23:15,253 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 337 transitions, 4089 flow [2024-06-21 16:23:15,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:15,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:15,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:23:15,254 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:15,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:15,254 INFO L85 PathProgramCache]: Analyzing trace with hash -195580092, now seen corresponding path program 10 times [2024-06-21 16:23:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:15,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376558153] [2024-06-21 16:23:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:15,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376558153] [2024-06-21 16:23:16,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376558153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:16,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:16,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:16,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425055962] [2024-06-21 16:23:16,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:16,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:16,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:16,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:16,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 337 transitions, 4089 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:16,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:16,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:16,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:17,929 INFO L124 PetriNetUnfolderBase]: 4380/6836 cut-off events. [2024-06-21 16:23:17,929 INFO L125 PetriNetUnfolderBase]: For 1332505/1332508 co-relation queries the response was YES. [2024-06-21 16:23:17,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67038 conditions, 6836 events. 4380/6836 cut-off events. For 1332505/1332508 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 40384 event pairs, 913 based on Foata normal form. 16/6849 useless extension candidates. Maximal degree in co-relation 66907. Up to 5552 conditions per place. [2024-06-21 16:23:18,022 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 248 selfloop transitions, 124 changer transitions 0/393 dead transitions. [2024-06-21 16:23:18,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 393 transitions, 5330 flow [2024-06-21 16:23:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 16:23:18,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-06-21 16:23:18,023 INFO L175 Difference]: Start difference. First operand has 272 places, 337 transitions, 4089 flow. Second operand 10 states and 218 transitions. [2024-06-21 16:23:18,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 393 transitions, 5330 flow [2024-06-21 16:23:19,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 393 transitions, 5075 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:19,527 INFO L231 Difference]: Finished difference. Result has 274 places, 338 transitions, 4125 flow [2024-06-21 16:23:19,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4125, PETRI_PLACES=274, PETRI_TRANSITIONS=338} [2024-06-21 16:23:19,527 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 16:23:19,527 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 338 transitions, 4125 flow [2024-06-21 16:23:19,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:19,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:19,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:19,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:23:19,528 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:19,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1219928514, now seen corresponding path program 1 times [2024-06-21 16:23:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:19,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072096895] [2024-06-21 16:23:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:19,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:20,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:20,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072096895] [2024-06-21 16:23:20,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072096895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:20,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:20,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:23:20,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440191215] [2024-06-21 16:23:20,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:20,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:23:20,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:20,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:23:20,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:23:20,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:23:20,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 338 transitions, 4125 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:20,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:20,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:23:20,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:21,577 INFO L124 PetriNetUnfolderBase]: 4750/7291 cut-off events. [2024-06-21 16:23:21,577 INFO L125 PetriNetUnfolderBase]: For 1330687/1330690 co-relation queries the response was YES. [2024-06-21 16:23:21,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69938 conditions, 7291 events. 4750/7291 cut-off events. For 1330687/1330690 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 41676 event pairs, 1266 based on Foata normal form. 4/7278 useless extension candidates. Maximal degree in co-relation 69806. Up to 6925 conditions per place. [2024-06-21 16:23:21,669 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 284 selfloop transitions, 54 changer transitions 0/369 dead transitions. [2024-06-21 16:23:21,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 369 transitions, 5344 flow [2024-06-21 16:23:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:23:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:23:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:23:21,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-21 16:23:21,671 INFO L175 Difference]: Start difference. First operand has 274 places, 338 transitions, 4125 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:23:21,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 369 transitions, 5344 flow [2024-06-21 16:23:23,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 369 transitions, 5076 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:23,309 INFO L231 Difference]: Finished difference. Result has 274 places, 348 transitions, 4146 flow [2024-06-21 16:23:23,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3857, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4146, PETRI_PLACES=274, PETRI_TRANSITIONS=348} [2024-06-21 16:23:23,309 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-21 16:23:23,309 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 348 transitions, 4146 flow [2024-06-21 16:23:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:23,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:23,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:23,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:23:23,310 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:23,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:23,310 INFO L85 PathProgramCache]: Analyzing trace with hash 522525922, now seen corresponding path program 2 times [2024-06-21 16:23:23,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:23,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175641351] [2024-06-21 16:23:23,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:23,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:23,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:23,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175641351] [2024-06-21 16:23:23,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175641351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:23,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:23,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:23:23,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836056837] [2024-06-21 16:23:23,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:23,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:23:23,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:23:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:23:24,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:23:24,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 348 transitions, 4146 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:24,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:24,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:23:24,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:25,352 INFO L124 PetriNetUnfolderBase]: 4744/7283 cut-off events. [2024-06-21 16:23:25,352 INFO L125 PetriNetUnfolderBase]: For 1347378/1347381 co-relation queries the response was YES. [2024-06-21 16:23:25,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69248 conditions, 7283 events. 4744/7283 cut-off events. For 1347378/1347381 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 41659 event pairs, 1266 based on Foata normal form. 4/7270 useless extension candidates. Maximal degree in co-relation 69114. Up to 6920 conditions per place. [2024-06-21 16:23:25,450 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 285 selfloop transitions, 50 changer transitions 0/366 dead transitions. [2024-06-21 16:23:25,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 366 transitions, 5204 flow [2024-06-21 16:23:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:23:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:23:25,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:23:25,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-21 16:23:25,451 INFO L175 Difference]: Start difference. First operand has 274 places, 348 transitions, 4146 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:23:25,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 366 transitions, 5204 flow [2024-06-21 16:23:26,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 366 transitions, 5126 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:23:26,863 INFO L231 Difference]: Finished difference. Result has 278 places, 348 transitions, 4177 flow [2024-06-21 16:23:26,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4177, PETRI_PLACES=278, PETRI_TRANSITIONS=348} [2024-06-21 16:23:26,863 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-21 16:23:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 348 transitions, 4177 flow [2024-06-21 16:23:26,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:26,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:26,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:26,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:23:26,864 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:26,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash -18443922, now seen corresponding path program 11 times [2024-06-21 16:23:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173269867] [2024-06-21 16:23:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173269867] [2024-06-21 16:23:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173269867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:28,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40180070] [2024-06-21 16:23:28,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:28,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:28,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:28,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:28,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:28,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 348 transitions, 4177 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:28,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:28,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:28,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:29,840 INFO L124 PetriNetUnfolderBase]: 4517/7067 cut-off events. [2024-06-21 16:23:29,840 INFO L125 PetriNetUnfolderBase]: For 1470653/1470656 co-relation queries the response was YES. [2024-06-21 16:23:29,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68481 conditions, 7067 events. 4517/7067 cut-off events. For 1470653/1470656 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 42185 event pairs, 990 based on Foata normal form. 36/7100 useless extension candidates. Maximal degree in co-relation 68346. Up to 6078 conditions per place. [2024-06-21 16:23:29,939 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 298 selfloop transitions, 72 changer transitions 0/394 dead transitions. [2024-06-21 16:23:29,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 394 transitions, 5135 flow [2024-06-21 16:23:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 16:23:29,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-21 16:23:29,940 INFO L175 Difference]: Start difference. First operand has 278 places, 348 transitions, 4177 flow. Second operand 10 states and 202 transitions. [2024-06-21 16:23:29,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 394 transitions, 5135 flow [2024-06-21 16:23:31,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 394 transitions, 5046 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:23:31,761 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 4319 flow [2024-06-21 16:23:31,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4319, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-21 16:23:31,761 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-21 16:23:31,761 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 4319 flow [2024-06-21 16:23:31,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:31,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:31,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:31,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:23:31,762 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:31,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash 348879168, now seen corresponding path program 12 times [2024-06-21 16:23:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:31,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317265104] [2024-06-21 16:23:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:31,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317265104] [2024-06-21 16:23:32,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317265104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:32,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:32,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:32,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124157900] [2024-06-21 16:23:32,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:32,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:32,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:33,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:33,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 4319 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:33,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:33,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:33,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:34,709 INFO L124 PetriNetUnfolderBase]: 4788/7513 cut-off events. [2024-06-21 16:23:34,709 INFO L125 PetriNetUnfolderBase]: For 1574136/1574139 co-relation queries the response was YES. [2024-06-21 16:23:34,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74973 conditions, 7513 events. 4788/7513 cut-off events. For 1574136/1574139 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 45706 event pairs, 1028 based on Foata normal form. 16/7526 useless extension candidates. Maximal degree in co-relation 74837. Up to 6091 conditions per place. [2024-06-21 16:23:34,823 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 299 selfloop transitions, 80 changer transitions 0/403 dead transitions. [2024-06-21 16:23:34,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 403 transitions, 5666 flow [2024-06-21 16:23:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:34,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:23:34,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48604651162790696 [2024-06-21 16:23:34,824 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 4319 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:23:34,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 403 transitions, 5666 flow [2024-06-21 16:23:36,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 403 transitions, 5495 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:36,733 INFO L231 Difference]: Finished difference. Result has 287 places, 353 transitions, 4448 flow [2024-06-21 16:23:36,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4448, PETRI_PLACES=287, PETRI_TRANSITIONS=353} [2024-06-21 16:23:36,734 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 243 predicate places. [2024-06-21 16:23:36,734 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 353 transitions, 4448 flow [2024-06-21 16:23:36,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:36,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:36,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:36,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:23:36,734 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:36,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:36,735 INFO L85 PathProgramCache]: Analyzing trace with hash 349056798, now seen corresponding path program 13 times [2024-06-21 16:23:36,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:36,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553873061] [2024-06-21 16:23:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:37,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:37,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:37,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553873061] [2024-06-21 16:23:37,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553873061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:37,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:37,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906173060] [2024-06-21 16:23:37,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:38,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:38,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 353 transitions, 4448 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:38,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:38,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:38,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:39,686 INFO L124 PetriNetUnfolderBase]: 4857/7631 cut-off events. [2024-06-21 16:23:39,686 INFO L125 PetriNetUnfolderBase]: For 1624259/1624262 co-relation queries the response was YES. [2024-06-21 16:23:39,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74828 conditions, 7631 events. 4857/7631 cut-off events. For 1624259/1624262 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 46747 event pairs, 1057 based on Foata normal form. 36/7664 useless extension candidates. Maximal degree in co-relation 74690. Up to 6640 conditions per place. [2024-06-21 16:23:39,789 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 307 selfloop transitions, 71 changer transitions 0/402 dead transitions. [2024-06-21 16:23:39,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 402 transitions, 5434 flow [2024-06-21 16:23:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:23:39,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-06-21 16:23:39,790 INFO L175 Difference]: Start difference. First operand has 287 places, 353 transitions, 4448 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:23:39,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 402 transitions, 5434 flow [2024-06-21 16:23:41,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 402 transitions, 5310 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:23:41,755 INFO L231 Difference]: Finished difference. Result has 292 places, 357 transitions, 4569 flow [2024-06-21 16:23:41,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4329, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4569, PETRI_PLACES=292, PETRI_TRANSITIONS=357} [2024-06-21 16:23:41,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-21 16:23:41,756 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 357 transitions, 4569 flow [2024-06-21 16:23:41,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:41,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:41,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:23:41,757 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash 348883818, now seen corresponding path program 14 times [2024-06-21 16:23:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705420823] [2024-06-21 16:23:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:41,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:42,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:42,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705420823] [2024-06-21 16:23:42,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705420823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:42,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:42,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:42,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882026389] [2024-06-21 16:23:42,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:42,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:42,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:42,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:42,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:43,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:43,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 357 transitions, 4569 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:43,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:43,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:43,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:44,776 INFO L124 PetriNetUnfolderBase]: 4821/7575 cut-off events. [2024-06-21 16:23:44,776 INFO L125 PetriNetUnfolderBase]: For 1542763/1542766 co-relation queries the response was YES. [2024-06-21 16:23:44,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73408 conditions, 7575 events. 4821/7575 cut-off events. For 1542763/1542766 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 46341 event pairs, 1020 based on Foata normal form. 20/7592 useless extension candidates. Maximal degree in co-relation 73267. Up to 6414 conditions per place. [2024-06-21 16:23:44,866 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 302 selfloop transitions, 81 changer transitions 0/407 dead transitions. [2024-06-21 16:23:44,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 407 transitions, 5497 flow [2024-06-21 16:23:44,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:23:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:23:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-21 16:23:44,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-21 16:23:44,867 INFO L175 Difference]: Start difference. First operand has 292 places, 357 transitions, 4569 flow. Second operand 11 states and 223 transitions. [2024-06-21 16:23:44,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 407 transitions, 5497 flow [2024-06-21 16:23:47,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 407 transitions, 5318 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 16:23:47,138 INFO L231 Difference]: Finished difference. Result has 296 places, 357 transitions, 4564 flow [2024-06-21 16:23:47,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4564, PETRI_PLACES=296, PETRI_TRANSITIONS=357} [2024-06-21 16:23:47,139 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-21 16:23:47,139 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 357 transitions, 4564 flow [2024-06-21 16:23:47,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:47,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:47,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:23:47,139 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:47,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -625848266, now seen corresponding path program 15 times [2024-06-21 16:23:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123278791] [2024-06-21 16:23:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:48,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123278791] [2024-06-21 16:23:48,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123278791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:48,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:48,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988151131] [2024-06-21 16:23:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:48,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:48,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:48,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:48,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:48,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 357 transitions, 4564 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:48,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:48,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:48,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:50,221 INFO L124 PetriNetUnfolderBase]: 4938/7778 cut-off events. [2024-06-21 16:23:50,221 INFO L125 PetriNetUnfolderBase]: For 1617166/1617169 co-relation queries the response was YES. [2024-06-21 16:23:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74399 conditions, 7778 events. 4938/7778 cut-off events. For 1617166/1617169 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 48016 event pairs, 1070 based on Foata normal form. 36/7811 useless extension candidates. Maximal degree in co-relation 74257. Up to 6779 conditions per place. [2024-06-21 16:23:50,313 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 305 selfloop transitions, 77 changer transitions 0/406 dead transitions. [2024-06-21 16:23:50,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 406 transitions, 5562 flow [2024-06-21 16:23:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:23:50,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-21 16:23:50,314 INFO L175 Difference]: Start difference. First operand has 296 places, 357 transitions, 4564 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:23:50,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 406 transitions, 5562 flow [2024-06-21 16:23:53,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 406 transitions, 5384 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 16:23:53,172 INFO L231 Difference]: Finished difference. Result has 296 places, 359 transitions, 4635 flow [2024-06-21 16:23:53,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4386, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4635, PETRI_PLACES=296, PETRI_TRANSITIONS=359} [2024-06-21 16:23:53,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-21 16:23:53,173 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 359 transitions, 4635 flow [2024-06-21 16:23:53,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:53,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:53,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:53,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:23:53,173 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:53,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 982289286, now seen corresponding path program 16 times [2024-06-21 16:23:53,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:53,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957595456] [2024-06-21 16:23:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:53,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:54,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:54,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:54,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957595456] [2024-06-21 16:23:54,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957595456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:54,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:54,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:54,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134508190] [2024-06-21 16:23:54,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:54,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:54,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:54,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:54,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:54,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 359 transitions, 4635 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:54,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:56,554 INFO L124 PetriNetUnfolderBase]: 5123/8087 cut-off events. [2024-06-21 16:23:56,554 INFO L125 PetriNetUnfolderBase]: For 1637050/1637053 co-relation queries the response was YES. [2024-06-21 16:23:56,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78252 conditions, 8087 events. 5123/8087 cut-off events. For 1637050/1637053 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 50618 event pairs, 1073 based on Foata normal form. 16/8100 useless extension candidates. Maximal degree in co-relation 78109. Up to 6783 conditions per place. [2024-06-21 16:23:56,649 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 305 selfloop transitions, 85 changer transitions 0/414 dead transitions. [2024-06-21 16:23:56,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 414 transitions, 5993 flow [2024-06-21 16:23:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:23:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:23:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 16:23:56,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49534883720930234 [2024-06-21 16:23:56,650 INFO L175 Difference]: Start difference. First operand has 296 places, 359 transitions, 4635 flow. Second operand 10 states and 213 transitions. [2024-06-21 16:23:56,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 414 transitions, 5993 flow [2024-06-21 16:23:58,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 414 transitions, 5804 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 16:23:58,416 INFO L231 Difference]: Finished difference. Result has 298 places, 361 transitions, 4710 flow [2024-06-21 16:23:58,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4446, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4710, PETRI_PLACES=298, PETRI_TRANSITIONS=361} [2024-06-21 16:23:58,417 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 254 predicate places. [2024-06-21 16:23:58,417 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 361 transitions, 4710 flow [2024-06-21 16:23:58,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:58,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:58,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:58,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:23:58,417 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:58,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:58,417 INFO L85 PathProgramCache]: Analyzing trace with hash -191106792, now seen corresponding path program 17 times [2024-06-21 16:23:58,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:58,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31591060] [2024-06-21 16:23:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:58,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:58,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:59,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31591060] [2024-06-21 16:23:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31591060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:59,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:59,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:23:59,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056005820] [2024-06-21 16:23:59,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:59,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:23:59,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:59,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:23:59,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:23:59,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:23:59,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 361 transitions, 4710 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:59,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:59,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:23:59,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:01,731 INFO L124 PetriNetUnfolderBase]: 5087/8031 cut-off events. [2024-06-21 16:24:01,731 INFO L125 PetriNetUnfolderBase]: For 1615179/1615182 co-relation queries the response was YES. [2024-06-21 16:24:01,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76440 conditions, 8031 events. 5087/8031 cut-off events. For 1615179/1615182 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50203 event pairs, 1075 based on Foata normal form. 20/8048 useless extension candidates. Maximal degree in co-relation 76296. Up to 6883 conditions per place. [2024-06-21 16:24:01,824 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 304 selfloop transitions, 84 changer transitions 0/412 dead transitions. [2024-06-21 16:24:01,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 412 transitions, 5648 flow [2024-06-21 16:24:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:24:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:24:01,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-21 16:24:01,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714587737843552 [2024-06-21 16:24:01,825 INFO L175 Difference]: Start difference. First operand has 298 places, 361 transitions, 4710 flow. Second operand 11 states and 223 transitions. [2024-06-21 16:24:01,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 412 transitions, 5648 flow [2024-06-21 16:24:03,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 412 transitions, 5498 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:03,757 INFO L231 Difference]: Finished difference. Result has 303 places, 361 transitions, 4740 flow [2024-06-21 16:24:03,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4560, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4740, PETRI_PLACES=303, PETRI_TRANSITIONS=361} [2024-06-21 16:24:03,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-21 16:24:03,758 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 361 transitions, 4740 flow [2024-06-21 16:24:03,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:03,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:03,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:24:03,758 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:03,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:03,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1091800143, now seen corresponding path program 2 times [2024-06-21 16:24:03,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:03,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359371419] [2024-06-21 16:24:03,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359371419] [2024-06-21 16:24:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359371419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:04,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:04,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:04,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278102616] [2024-06-21 16:24:04,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:04,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:04,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:04,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:04,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 361 transitions, 4740 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:04,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:04,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:04,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:06,285 INFO L124 PetriNetUnfolderBase]: 5677/8792 cut-off events. [2024-06-21 16:24:06,285 INFO L125 PetriNetUnfolderBase]: For 1653339/1653342 co-relation queries the response was YES. [2024-06-21 16:24:06,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82118 conditions, 8792 events. 5677/8792 cut-off events. For 1653339/1653342 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 53257 event pairs, 1529 based on Foata normal form. 8/8769 useless extension candidates. Maximal degree in co-relation 81972. Up to 8140 conditions per place. [2024-06-21 16:24:06,417 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 296 selfloop transitions, 72 changer transitions 0/399 dead transitions. [2024-06-21 16:24:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 399 transitions, 6294 flow [2024-06-21 16:24:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:24:06,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-21 16:24:06,418 INFO L175 Difference]: Start difference. First operand has 303 places, 361 transitions, 4740 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:24:06,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 399 transitions, 6294 flow [2024-06-21 16:24:08,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 399 transitions, 6121 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 16:24:08,616 INFO L231 Difference]: Finished difference. Result has 302 places, 372 transitions, 4907 flow [2024-06-21 16:24:08,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4567, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4907, PETRI_PLACES=302, PETRI_TRANSITIONS=372} [2024-06-21 16:24:08,617 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-21 16:24:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 372 transitions, 4907 flow [2024-06-21 16:24:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:08,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:24:08,617 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:08,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1091787123, now seen corresponding path program 3 times [2024-06-21 16:24:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576683943] [2024-06-21 16:24:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:09,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:09,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576683943] [2024-06-21 16:24:09,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576683943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:09,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:09,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:09,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131067187] [2024-06-21 16:24:09,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:09,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:09,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:09,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:09,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 372 transitions, 4907 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:11,248 INFO L124 PetriNetUnfolderBase]: 5665/8777 cut-off events. [2024-06-21 16:24:11,248 INFO L125 PetriNetUnfolderBase]: For 1659270/1659273 co-relation queries the response was YES. [2024-06-21 16:24:11,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81733 conditions, 8777 events. 5665/8777 cut-off events. For 1659270/1659273 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 53223 event pairs, 1526 based on Foata normal form. 8/8754 useless extension candidates. Maximal degree in co-relation 81585. Up to 8136 conditions per place. [2024-06-21 16:24:11,383 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 296 selfloop transitions, 73 changer transitions 0/400 dead transitions. [2024-06-21 16:24:11,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 400 transitions, 6124 flow [2024-06-21 16:24:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:24:11,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:24:11,384 INFO L175 Difference]: Start difference. First operand has 302 places, 372 transitions, 4907 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:24:11,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 400 transitions, 6124 flow [2024-06-21 16:24:14,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 400 transitions, 5960 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 16:24:14,412 INFO L231 Difference]: Finished difference. Result has 306 places, 373 transitions, 4923 flow [2024-06-21 16:24:14,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4743, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4923, PETRI_PLACES=306, PETRI_TRANSITIONS=373} [2024-06-21 16:24:14,413 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-21 16:24:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 373 transitions, 4923 flow [2024-06-21 16:24:14,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:24:14,413 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:14,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:14,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2085845340, now seen corresponding path program 2 times [2024-06-21 16:24:14,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364178727] [2024-06-21 16:24:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:15,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364178727] [2024-06-21 16:24:15,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364178727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:15,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:15,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:24:15,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329897466] [2024-06-21 16:24:15,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:15,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:24:15,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:24:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:24:15,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:15,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 373 transitions, 4923 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:15,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:15,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:15,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:17,292 INFO L124 PetriNetUnfolderBase]: 5677/8794 cut-off events. [2024-06-21 16:24:17,293 INFO L125 PetriNetUnfolderBase]: For 1672215/1672218 co-relation queries the response was YES. [2024-06-21 16:24:17,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81898 conditions, 8794 events. 5677/8794 cut-off events. For 1672215/1672218 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 53340 event pairs, 1528 based on Foata normal form. 4/8767 useless extension candidates. Maximal degree in co-relation 81749. Up to 8424 conditions per place. [2024-06-21 16:24:17,402 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 310 selfloop transitions, 55 changer transitions 0/396 dead transitions. [2024-06-21 16:24:17,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 396 transitions, 6127 flow [2024-06-21 16:24:17,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:24:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:24:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:24:17,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:24:17,403 INFO L175 Difference]: Start difference. First operand has 306 places, 373 transitions, 4923 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:24:17,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 396 transitions, 6127 flow [2024-06-21 16:24:20,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 396 transitions, 5979 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:24:20,311 INFO L231 Difference]: Finished difference. Result has 309 places, 377 transitions, 4948 flow [2024-06-21 16:24:20,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4775, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4948, PETRI_PLACES=309, PETRI_TRANSITIONS=377} [2024-06-21 16:24:20,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 265 predicate places. [2024-06-21 16:24:20,311 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 377 transitions, 4948 flow [2024-06-21 16:24:20,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:20,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:20,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:20,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:24:20,312 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:20,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:20,312 INFO L85 PathProgramCache]: Analyzing trace with hash 168587824, now seen corresponding path program 3 times [2024-06-21 16:24:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:20,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662371547] [2024-06-21 16:24:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:20,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:20,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662371547] [2024-06-21 16:24:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662371547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:20,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:24:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840716996] [2024-06-21 16:24:20,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:24:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:24:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:24:21,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:21,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 377 transitions, 4948 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:21,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:21,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:21,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:22,872 INFO L124 PetriNetUnfolderBase]: 5664/8774 cut-off events. [2024-06-21 16:24:22,872 INFO L125 PetriNetUnfolderBase]: For 1693759/1693759 co-relation queries the response was YES. [2024-06-21 16:24:22,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81772 conditions, 8774 events. 5664/8774 cut-off events. For 1693759/1693759 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53206 event pairs, 1522 based on Foata normal form. 1/8745 useless extension candidates. Maximal degree in co-relation 81622. Up to 8530 conditions per place. [2024-06-21 16:24:22,975 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 339 selfloop transitions, 24 changer transitions 0/394 dead transitions. [2024-06-21 16:24:22,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 394 transitions, 5908 flow [2024-06-21 16:24:22,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:24:22,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:24:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 16:24:22,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-21 16:24:22,976 INFO L175 Difference]: Start difference. First operand has 309 places, 377 transitions, 4948 flow. Second operand 7 states and 125 transitions. [2024-06-21 16:24:22,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 394 transitions, 5908 flow [2024-06-21 16:24:25,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 394 transitions, 5749 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:24:25,862 INFO L231 Difference]: Finished difference. Result has 310 places, 377 transitions, 4843 flow [2024-06-21 16:24:25,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4789, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4843, PETRI_PLACES=310, PETRI_TRANSITIONS=377} [2024-06-21 16:24:25,862 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-21 16:24:25,862 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 377 transitions, 4843 flow [2024-06-21 16:24:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:25,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:25,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:24:25,863 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:25,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:25,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1007294244, now seen corresponding path program 4 times [2024-06-21 16:24:25,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:25,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249994527] [2024-06-21 16:24:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:25,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:26,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:26,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249994527] [2024-06-21 16:24:26,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249994527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:26,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:26,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:24:26,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826777528] [2024-06-21 16:24:26,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:26,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:24:26,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:26,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:24:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:24:26,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:26,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 377 transitions, 4843 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:26,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:26,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:26,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:28,270 INFO L124 PetriNetUnfolderBase]: 5669/8781 cut-off events. [2024-06-21 16:24:28,270 INFO L125 PetriNetUnfolderBase]: For 1725478/1725478 co-relation queries the response was YES. [2024-06-21 16:24:28,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81958 conditions, 8781 events. 5669/8781 cut-off events. For 1725478/1725478 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53229 event pairs, 1522 based on Foata normal form. 1/8752 useless extension candidates. Maximal degree in co-relation 81807. Up to 8552 conditions per place. [2024-06-21 16:24:28,397 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 343 selfloop transitions, 19 changer transitions 0/393 dead transitions. [2024-06-21 16:24:28,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 393 transitions, 5657 flow [2024-06-21 16:24:28,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:24:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:24:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 16:24:28,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-21 16:24:28,398 INFO L175 Difference]: Start difference. First operand has 310 places, 377 transitions, 4843 flow. Second operand 7 states and 120 transitions. [2024-06-21 16:24:28,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 393 transitions, 5657 flow [2024-06-21 16:24:31,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 393 transitions, 5465 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:24:31,695 INFO L231 Difference]: Finished difference. Result has 308 places, 380 transitions, 4759 flow [2024-06-21 16:24:31,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4759, PETRI_PLACES=308, PETRI_TRANSITIONS=380} [2024-06-21 16:24:31,696 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-21 16:24:31,696 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 380 transitions, 4759 flow [2024-06-21 16:24:31,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:31,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:31,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:31,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:24:31,696 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:31,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 948838654, now seen corresponding path program 5 times [2024-06-21 16:24:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703875258] [2024-06-21 16:24:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:32,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:32,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703875258] [2024-06-21 16:24:32,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703875258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:32,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:32,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:24:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274661564] [2024-06-21 16:24:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:32,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:24:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:24:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:24:32,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:32,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 380 transitions, 4759 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:32,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:32,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:32,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:34,097 INFO L124 PetriNetUnfolderBase]: 5663/8774 cut-off events. [2024-06-21 16:24:34,098 INFO L125 PetriNetUnfolderBase]: For 1755332/1755335 co-relation queries the response was YES. [2024-06-21 16:24:34,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81879 conditions, 8774 events. 5663/8774 cut-off events. For 1755332/1755335 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53197 event pairs, 1518 based on Foata normal form. 4/8747 useless extension candidates. Maximal degree in co-relation 81728. Up to 8520 conditions per place. [2024-06-21 16:24:34,211 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 331 selfloop transitions, 29 changer transitions 0/391 dead transitions. [2024-06-21 16:24:34,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 391 transitions, 5701 flow [2024-06-21 16:24:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:24:34,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:24:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:24:34,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-21 16:24:34,212 INFO L175 Difference]: Start difference. First operand has 308 places, 380 transitions, 4759 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:24:34,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 391 transitions, 5701 flow [2024-06-21 16:24:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 391 transitions, 5635 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:24:37,169 INFO L231 Difference]: Finished difference. Result has 310 places, 380 transitions, 4759 flow [2024-06-21 16:24:37,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4759, PETRI_PLACES=310, PETRI_TRANSITIONS=380} [2024-06-21 16:24:37,169 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-21 16:24:37,169 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 380 transitions, 4759 flow [2024-06-21 16:24:37,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:37,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:37,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:37,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:24:37,170 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:37,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2019174620, now seen corresponding path program 6 times [2024-06-21 16:24:37,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:37,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885479426] [2024-06-21 16:24:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:37,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:37,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:37,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885479426] [2024-06-21 16:24:37,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885479426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:37,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:37,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:24:37,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168321338] [2024-06-21 16:24:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:37,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:24:37,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:24:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:24:37,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:37,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 380 transitions, 4759 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:37,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:37,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:37,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:39,621 INFO L124 PetriNetUnfolderBase]: 5658/8767 cut-off events. [2024-06-21 16:24:39,622 INFO L125 PetriNetUnfolderBase]: For 1775172/1775175 co-relation queries the response was YES. [2024-06-21 16:24:39,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82062 conditions, 8767 events. 5658/8767 cut-off events. For 1775172/1775175 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 53121 event pairs, 1529 based on Foata normal form. 3/8739 useless extension candidates. Maximal degree in co-relation 81910. Up to 8537 conditions per place. [2024-06-21 16:24:39,736 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 340 selfloop transitions, 19 changer transitions 0/390 dead transitions. [2024-06-21 16:24:39,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 390 transitions, 5501 flow [2024-06-21 16:24:39,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:24:39,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:24:39,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 16:24:39,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-21 16:24:39,737 INFO L175 Difference]: Start difference. First operand has 310 places, 380 transitions, 4759 flow. Second operand 7 states and 117 transitions. [2024-06-21 16:24:39,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 390 transitions, 5501 flow [2024-06-21 16:24:42,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 390 transitions, 5428 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:24:42,871 INFO L231 Difference]: Finished difference. Result has 312 places, 380 transitions, 4730 flow [2024-06-21 16:24:42,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4730, PETRI_PLACES=312, PETRI_TRANSITIONS=380} [2024-06-21 16:24:42,872 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 268 predicate places. [2024-06-21 16:24:42,872 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 380 transitions, 4730 flow [2024-06-21 16:24:42,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:42,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:42,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:24:42,872 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:42,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash -306604476, now seen corresponding path program 1 times [2024-06-21 16:24:42,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:42,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807571989] [2024-06-21 16:24:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:44,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:44,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:44,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807571989] [2024-06-21 16:24:44,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807571989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:44,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:44,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:44,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785612835] [2024-06-21 16:24:44,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:44,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:44,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:44,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:44,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:44,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:44,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 380 transitions, 4730 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:44,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:44,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:44,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:46,196 INFO L124 PetriNetUnfolderBase]: 5779/8917 cut-off events. [2024-06-21 16:24:46,196 INFO L125 PetriNetUnfolderBase]: For 1823356/1823356 co-relation queries the response was YES. [2024-06-21 16:24:46,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83237 conditions, 8917 events. 5779/8917 cut-off events. For 1823356/1823356 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 53722 event pairs, 1495 based on Foata normal form. 4/8919 useless extension candidates. Maximal degree in co-relation 83084. Up to 8545 conditions per place. [2024-06-21 16:24:46,313 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 357 selfloop transitions, 39 changer transitions 0/420 dead transitions. [2024-06-21 16:24:46,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 420 transitions, 5700 flow [2024-06-21 16:24:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:46,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 16:24:46,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-21 16:24:46,314 INFO L175 Difference]: Start difference. First operand has 312 places, 380 transitions, 4730 flow. Second operand 10 states and 181 transitions. [2024-06-21 16:24:46,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 420 transitions, 5700 flow [2024-06-21 16:24:49,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 420 transitions, 5618 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:24:49,673 INFO L231 Difference]: Finished difference. Result has 315 places, 385 transitions, 4829 flow [2024-06-21 16:24:49,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4829, PETRI_PLACES=315, PETRI_TRANSITIONS=385} [2024-06-21 16:24:49,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-21 16:24:49,674 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 385 transitions, 4829 flow [2024-06-21 16:24:49,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:49,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:49,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:49,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:24:49,674 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:49,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:49,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1571889518, now seen corresponding path program 18 times [2024-06-21 16:24:49,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:49,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484069917] [2024-06-21 16:24:49,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:49,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:50,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:50,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484069917] [2024-06-21 16:24:50,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484069917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:50,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:50,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:24:50,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120855202] [2024-06-21 16:24:50,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:50,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:24:50,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:50,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:24:50,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:24:50,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:24:50,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 385 transitions, 4829 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:50,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:50,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:24:50,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:24:52,782 INFO L124 PetriNetUnfolderBase]: 5390/8495 cut-off events. [2024-06-21 16:24:52,782 INFO L125 PetriNetUnfolderBase]: For 1988404/1988407 co-relation queries the response was YES. [2024-06-21 16:24:52,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81932 conditions, 8495 events. 5390/8495 cut-off events. For 1988404/1988407 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 53498 event pairs, 1253 based on Foata normal form. 42/8529 useless extension candidates. Maximal degree in co-relation 81777. Up to 7773 conditions per place. [2024-06-21 16:24:52,893 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 371 selfloop transitions, 29 changer transitions 0/427 dead transitions. [2024-06-21 16:24:52,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 427 transitions, 5849 flow [2024-06-21 16:24:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:24:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:24:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:24:52,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-21 16:24:52,894 INFO L175 Difference]: Start difference. First operand has 315 places, 385 transitions, 4829 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:24:52,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 427 transitions, 5849 flow [2024-06-21 16:24:57,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 427 transitions, 5716 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 16:24:57,024 INFO L231 Difference]: Finished difference. Result has 318 places, 387 transitions, 4855 flow [2024-06-21 16:24:57,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4855, PETRI_PLACES=318, PETRI_TRANSITIONS=387} [2024-06-21 16:24:57,024 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-21 16:24:57,024 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 387 transitions, 4855 flow [2024-06-21 16:24:57,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:57,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:24:57,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:24:57,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:24:57,025 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:24:57,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:24:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash -967306634, now seen corresponding path program 2 times [2024-06-21 16:24:57,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:24:57,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576833096] [2024-06-21 16:24:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:24:57,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:24:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:24:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:24:58,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:24:58,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576833096] [2024-06-21 16:24:58,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576833096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:24:58,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:24:58,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:24:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695450009] [2024-06-21 16:24:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:24:58,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:24:58,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:24:58,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:24:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:24:58,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:24:58,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 387 transitions, 4855 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:24:58,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:24:58,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:24:58,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:00,347 INFO L124 PetriNetUnfolderBase]: 5946/9194 cut-off events. [2024-06-21 16:25:00,347 INFO L125 PetriNetUnfolderBase]: For 1907642/1907642 co-relation queries the response was YES. [2024-06-21 16:25:00,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86494 conditions, 9194 events. 5946/9194 cut-off events. For 1907642/1907642 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 55974 event pairs, 1540 based on Foata normal form. 4/9196 useless extension candidates. Maximal degree in co-relation 86338. Up to 8930 conditions per place. [2024-06-21 16:25:00,471 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 376 selfloop transitions, 22 changer transitions 0/422 dead transitions. [2024-06-21 16:25:00,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 422 transitions, 5801 flow [2024-06-21 16:25:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 16:25:00,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-21 16:25:00,472 INFO L175 Difference]: Start difference. First operand has 318 places, 387 transitions, 4855 flow. Second operand 10 states and 174 transitions. [2024-06-21 16:25:00,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 422 transitions, 5801 flow [2024-06-21 16:25:03,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 422 transitions, 5655 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:03,542 INFO L231 Difference]: Finished difference. Result has 320 places, 389 transitions, 4830 flow [2024-06-21 16:25:03,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4709, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4830, PETRI_PLACES=320, PETRI_TRANSITIONS=389} [2024-06-21 16:25:03,542 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-21 16:25:03,542 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 389 transitions, 4830 flow [2024-06-21 16:25:03,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:03,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:03,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:03,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:25:03,542 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1758111746, now seen corresponding path program 3 times [2024-06-21 16:25:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:03,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7181898] [2024-06-21 16:25:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:03,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7181898] [2024-06-21 16:25:04,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7181898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:04,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:04,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:04,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289521450] [2024-06-21 16:25:04,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:04,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:04,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:25:04,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 389 transitions, 4830 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:04,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:04,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:25:04,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:06,992 INFO L124 PetriNetUnfolderBase]: 5963/9221 cut-off events. [2024-06-21 16:25:06,993 INFO L125 PetriNetUnfolderBase]: For 1940421/1940421 co-relation queries the response was YES. [2024-06-21 16:25:07,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86677 conditions, 9221 events. 5963/9221 cut-off events. For 1940421/1940421 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 55963 event pairs, 1544 based on Foata normal form. 4/9223 useless extension candidates. Maximal degree in co-relation 86520. Up to 8943 conditions per place. [2024-06-21 16:25:07,133 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 377 selfloop transitions, 23 changer transitions 0/424 dead transitions. [2024-06-21 16:25:07,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 424 transitions, 5782 flow [2024-06-21 16:25:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 16:25:07,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-21 16:25:07,136 INFO L175 Difference]: Start difference. First operand has 320 places, 389 transitions, 4830 flow. Second operand 10 states and 174 transitions. [2024-06-21 16:25:07,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 424 transitions, 5782 flow [2024-06-21 16:25:11,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 424 transitions, 5675 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:11,144 INFO L231 Difference]: Finished difference. Result has 322 places, 391 transitions, 4850 flow [2024-06-21 16:25:11,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4850, PETRI_PLACES=322, PETRI_TRANSITIONS=391} [2024-06-21 16:25:11,145 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-21 16:25:11,145 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 391 transitions, 4850 flow [2024-06-21 16:25:11,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:11,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:11,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:11,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:25:11,145 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:11,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:11,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2090915106, now seen corresponding path program 19 times [2024-06-21 16:25:11,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:11,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491544135] [2024-06-21 16:25:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:11,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:12,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491544135] [2024-06-21 16:25:12,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491544135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:12,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:12,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:12,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939782584] [2024-06-21 16:25:12,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:12,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:12,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:12,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:12,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:12,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 391 transitions, 4850 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:12,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:12,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:12,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:14,317 INFO L124 PetriNetUnfolderBase]: 5557/8782 cut-off events. [2024-06-21 16:25:14,317 INFO L125 PetriNetUnfolderBase]: For 2096704/2096707 co-relation queries the response was YES. [2024-06-21 16:25:14,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84566 conditions, 8782 events. 5557/8782 cut-off events. For 2096704/2096707 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 55848 event pairs, 1278 based on Foata normal form. 38/8812 useless extension candidates. Maximal degree in co-relation 84408. Up to 8015 conditions per place. [2024-06-21 16:25:14,451 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 365 selfloop transitions, 42 changer transitions 0/434 dead transitions. [2024-06-21 16:25:14,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 434 transitions, 5892 flow [2024-06-21 16:25:14,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 16:25:14,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-21 16:25:14,452 INFO L175 Difference]: Start difference. First operand has 322 places, 391 transitions, 4850 flow. Second operand 10 states and 194 transitions. [2024-06-21 16:25:14,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 434 transitions, 5892 flow [2024-06-21 16:25:18,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 434 transitions, 5783 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:18,583 INFO L231 Difference]: Finished difference. Result has 324 places, 393 transitions, 4930 flow [2024-06-21 16:25:18,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4930, PETRI_PLACES=324, PETRI_TRANSITIONS=393} [2024-06-21 16:25:18,584 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-21 16:25:18,584 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 393 transitions, 4930 flow [2024-06-21 16:25:18,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:18,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:18,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:18,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:25:18,584 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:18,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash -343611426, now seen corresponding path program 20 times [2024-06-21 16:25:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:18,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050570774] [2024-06-21 16:25:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:19,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:19,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050570774] [2024-06-21 16:25:19,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050570774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:19,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:19,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:19,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684539521] [2024-06-21 16:25:19,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:19,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:19,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:19,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:19,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:19,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 393 transitions, 4930 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:19,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:19,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:19,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:21,890 INFO L124 PetriNetUnfolderBase]: 5615/8880 cut-off events. [2024-06-21 16:25:21,890 INFO L125 PetriNetUnfolderBase]: For 2056124/2056127 co-relation queries the response was YES. [2024-06-21 16:25:21,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85602 conditions, 8880 events. 5615/8880 cut-off events. For 2056124/2056127 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 56675 event pairs, 1254 based on Foata normal form. 18/8890 useless extension candidates. Maximal degree in co-relation 85443. Up to 7377 conditions per place. [2024-06-21 16:25:22,027 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 354 selfloop transitions, 59 changer transitions 0/440 dead transitions. [2024-06-21 16:25:22,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 440 transitions, 6319 flow [2024-06-21 16:25:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:25:22,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-21 16:25:22,028 INFO L175 Difference]: Start difference. First operand has 324 places, 393 transitions, 4930 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:25:22,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 440 transitions, 6319 flow [2024-06-21 16:25:26,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 440 transitions, 6190 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:26,469 INFO L231 Difference]: Finished difference. Result has 326 places, 394 transitions, 4974 flow [2024-06-21 16:25:26,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4801, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4974, PETRI_PLACES=326, PETRI_TRANSITIONS=394} [2024-06-21 16:25:26,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-21 16:25:26,469 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 394 transitions, 4974 flow [2024-06-21 16:25:26,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:26,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:26,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:26,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:25:26,470 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:26,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:26,470 INFO L85 PathProgramCache]: Analyzing trace with hash -975350204, now seen corresponding path program 4 times [2024-06-21 16:25:26,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:26,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173354452] [2024-06-21 16:25:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:26,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:27,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:27,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173354452] [2024-06-21 16:25:27,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173354452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:27,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:27,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524072927] [2024-06-21 16:25:27,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:27,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:27,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:27,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:27,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:27,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:25:27,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 394 transitions, 4974 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:27,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:27,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:25:27,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:29,825 INFO L124 PetriNetUnfolderBase]: 6205/9623 cut-off events. [2024-06-21 16:25:29,825 INFO L125 PetriNetUnfolderBase]: For 2064041/2064041 co-relation queries the response was YES. [2024-06-21 16:25:29,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90372 conditions, 9623 events. 6205/9623 cut-off events. For 2064041/2064041 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 59372 event pairs, 1610 based on Foata normal form. 4/9625 useless extension candidates. Maximal degree in co-relation 90212. Up to 9332 conditions per place. [2024-06-21 16:25:29,970 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 382 selfloop transitions, 27 changer transitions 0/433 dead transitions. [2024-06-21 16:25:29,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 433 transitions, 5991 flow [2024-06-21 16:25:29,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-21 16:25:29,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-21 16:25:29,971 INFO L175 Difference]: Start difference. First operand has 326 places, 394 transitions, 4974 flow. Second operand 10 states and 177 transitions. [2024-06-21 16:25:29,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 433 transitions, 5991 flow [2024-06-21 16:25:34,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 433 transitions, 5653 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-21 16:25:34,557 INFO L231 Difference]: Finished difference. Result has 326 places, 399 transitions, 4822 flow [2024-06-21 16:25:34,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4822, PETRI_PLACES=326, PETRI_TRANSITIONS=399} [2024-06-21 16:25:34,557 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 282 predicate places. [2024-06-21 16:25:34,557 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 399 transitions, 4822 flow [2024-06-21 16:25:34,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:34,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:34,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:34,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:25:34,557 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:34,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:34,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1854435822, now seen corresponding path program 5 times [2024-06-21 16:25:34,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:34,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316070048] [2024-06-21 16:25:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:34,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:35,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:35,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316070048] [2024-06-21 16:25:35,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316070048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:35,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:35,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:35,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120717513] [2024-06-21 16:25:35,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:35,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:35,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:35,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:25:35,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 399 transitions, 4822 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:35,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:35,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:25:35,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:38,158 INFO L124 PetriNetUnfolderBase]: 6222/9650 cut-off events. [2024-06-21 16:25:38,158 INFO L125 PetriNetUnfolderBase]: For 2095701/2095701 co-relation queries the response was YES. [2024-06-21 16:25:38,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89712 conditions, 9650 events. 6222/9650 cut-off events. For 2095701/2095701 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 59583 event pairs, 1625 based on Foata normal form. 4/9652 useless extension candidates. Maximal degree in co-relation 89553. Up to 9350 conditions per place. [2024-06-21 16:25:38,309 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 381 selfloop transitions, 29 changer transitions 0/434 dead transitions. [2024-06-21 16:25:38,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 434 transitions, 5804 flow [2024-06-21 16:25:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:25:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:25:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 16:25:38,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-21 16:25:38,310 INFO L175 Difference]: Start difference. First operand has 326 places, 399 transitions, 4822 flow. Second operand 10 states and 175 transitions. [2024-06-21 16:25:38,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 434 transitions, 5804 flow [2024-06-21 16:25:42,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 434 transitions, 5675 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:25:42,328 INFO L231 Difference]: Finished difference. Result has 329 places, 401 transitions, 4843 flow [2024-06-21 16:25:42,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4843, PETRI_PLACES=329, PETRI_TRANSITIONS=401} [2024-06-21 16:25:42,329 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-21 16:25:42,329 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 401 transitions, 4843 flow [2024-06-21 16:25:42,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:42,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:42,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:42,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:25:42,329 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:42,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:42,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1758468246, now seen corresponding path program 1 times [2024-06-21 16:25:42,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:42,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655198563] [2024-06-21 16:25:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:42,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:43,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:43,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655198563] [2024-06-21 16:25:43,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655198563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:43,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:43,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505696835] [2024-06-21 16:25:43,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:43,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:43,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:25:43,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 401 transitions, 4843 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:43,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:43,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:25:43,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:45,321 INFO L124 PetriNetUnfolderBase]: 6236/9671 cut-off events. [2024-06-21 16:25:45,321 INFO L125 PetriNetUnfolderBase]: For 2116709/2116712 co-relation queries the response was YES. [2024-06-21 16:25:45,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89982 conditions, 9671 events. 6236/9671 cut-off events. For 2116709/2116712 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59710 event pairs, 1605 based on Foata normal form. 4/9672 useless extension candidates. Maximal degree in co-relation 89822. Up to 9374 conditions per place. [2024-06-21 16:25:45,465 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 379 selfloop transitions, 30 changer transitions 0/433 dead transitions. [2024-06-21 16:25:45,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 433 transitions, 5773 flow [2024-06-21 16:25:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:25:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:25:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:25:45,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-21 16:25:45,466 INFO L175 Difference]: Start difference. First operand has 329 places, 401 transitions, 4843 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:25:45,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 433 transitions, 5773 flow [2024-06-21 16:25:49,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 433 transitions, 5625 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:49,359 INFO L231 Difference]: Finished difference. Result has 330 places, 404 transitions, 4809 flow [2024-06-21 16:25:49,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4809, PETRI_PLACES=330, PETRI_TRANSITIONS=404} [2024-06-21 16:25:49,359 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-21 16:25:49,359 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 404 transitions, 4809 flow [2024-06-21 16:25:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:49,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:49,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:49,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:25:49,359 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:49,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -343606776, now seen corresponding path program 21 times [2024-06-21 16:25:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940310668] [2024-06-21 16:25:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:25:50,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940310668] [2024-06-21 16:25:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940310668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:50,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:50,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:25:50,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855412413] [2024-06-21 16:25:50,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:25:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:25:50,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:25:50,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:25:50,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 404 transitions, 4809 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:50,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:50,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:25:50,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:25:52,777 INFO L124 PetriNetUnfolderBase]: 5734/9075 cut-off events. [2024-06-21 16:25:52,777 INFO L125 PetriNetUnfolderBase]: For 2174944/2174947 co-relation queries the response was YES. [2024-06-21 16:25:52,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86056 conditions, 9075 events. 5734/9075 cut-off events. For 2174944/2174947 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 58178 event pairs, 1294 based on Foata normal form. 22/9094 useless extension candidates. Maximal degree in co-relation 85895. Up to 8082 conditions per place. [2024-06-21 16:25:52,918 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 363 selfloop transitions, 60 changer transitions 0/451 dead transitions. [2024-06-21 16:25:52,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 451 transitions, 5848 flow [2024-06-21 16:25:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:25:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:25:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 16:25:52,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-21 16:25:52,919 INFO L175 Difference]: Start difference. First operand has 330 places, 404 transitions, 4809 flow. Second operand 11 states and 213 transitions. [2024-06-21 16:25:52,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 451 transitions, 5848 flow [2024-06-21 16:25:57,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 451 transitions, 5783 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:25:57,417 INFO L231 Difference]: Finished difference. Result has 333 places, 405 transitions, 4921 flow [2024-06-21 16:25:57,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4921, PETRI_PLACES=333, PETRI_TRANSITIONS=405} [2024-06-21 16:25:57,418 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-21 16:25:57,418 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 405 transitions, 4921 flow [2024-06-21 16:25:57,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:57,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:25:57,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:25:57,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:25:57,418 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:25:57,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:25:57,419 INFO L85 PathProgramCache]: Analyzing trace with hash -336931422, now seen corresponding path program 6 times [2024-06-21 16:25:57,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:25:57,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235034581] [2024-06-21 16:25:57,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:25:57,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:25:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:25:58,578 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 16:25:58,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:25:58,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235034581] [2024-06-21 16:25:58,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235034581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:25:58,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:25:58,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:25:58,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378022377] [2024-06-21 16:25:58,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:25:58,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:25:58,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:25:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:25:58,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:25:58,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:25:58,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 405 transitions, 4921 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:25:58,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:25:58,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:25:58,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:00,839 INFO L124 PetriNetUnfolderBase]: 6320/9810 cut-off events. [2024-06-21 16:26:00,840 INFO L125 PetriNetUnfolderBase]: For 2148528/2148528 co-relation queries the response was YES. [2024-06-21 16:26:00,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90812 conditions, 9810 events. 6320/9810 cut-off events. For 2148528/2148528 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 60832 event pairs, 1639 based on Foata normal form. 4/9812 useless extension candidates. Maximal degree in co-relation 90650. Up to 9483 conditions per place. [2024-06-21 16:26:00,998 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 386 selfloop transitions, 34 changer transitions 0/444 dead transitions. [2024-06-21 16:26:00,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 444 transitions, 5959 flow [2024-06-21 16:26:00,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:26:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:26:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:26:00,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-21 16:26:00,999 INFO L175 Difference]: Start difference. First operand has 333 places, 405 transitions, 4921 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:26:00,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 444 transitions, 5959 flow [2024-06-21 16:26:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 444 transitions, 5821 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:26:05,407 INFO L231 Difference]: Finished difference. Result has 335 places, 410 transitions, 4978 flow [2024-06-21 16:26:05,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4978, PETRI_PLACES=335, PETRI_TRANSITIONS=410} [2024-06-21 16:26:05,407 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-21 16:26:05,407 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 410 transitions, 4978 flow [2024-06-21 16:26:05,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:05,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:05,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:05,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:26:05,407 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:05,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1415514618, now seen corresponding path program 22 times [2024-06-21 16:26:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:05,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614691890] [2024-06-21 16:26:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:05,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:06,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:06,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:06,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614691890] [2024-06-21 16:26:06,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614691890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:06,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:06,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:26:06,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255449550] [2024-06-21 16:26:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:06,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:26:06,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:06,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:26:06,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:26:06,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-21 16:26:06,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 410 transitions, 4978 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:06,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:06,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-21 16:26:06,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:08,673 INFO L124 PetriNetUnfolderBase]: 5669/8975 cut-off events. [2024-06-21 16:26:08,673 INFO L125 PetriNetUnfolderBase]: For 2141876/2141879 co-relation queries the response was YES. [2024-06-21 16:26:08,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82487 conditions, 8975 events. 5669/8975 cut-off events. For 2141876/2141879 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 57583 event pairs, 1275 based on Foata normal form. 38/9010 useless extension candidates. Maximal degree in co-relation 82323. Up to 8184 conditions per place. [2024-06-21 16:26:08,815 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 376 selfloop transitions, 46 changer transitions 0/451 dead transitions. [2024-06-21 16:26:08,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 451 transitions, 5958 flow [2024-06-21 16:26:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:26:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:26:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-21 16:26:08,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-21 16:26:08,816 INFO L175 Difference]: Start difference. First operand has 335 places, 410 transitions, 4978 flow. Second operand 10 states and 195 transitions. [2024-06-21 16:26:08,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 451 transitions, 5958 flow [2024-06-21 16:26:12,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 451 transitions, 5783 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 16:26:12,887 INFO L231 Difference]: Finished difference. Result has 338 places, 410 transitions, 4904 flow [2024-06-21 16:26:12,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4904, PETRI_PLACES=338, PETRI_TRANSITIONS=410} [2024-06-21 16:26:12,887 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 294 predicate places. [2024-06-21 16:26:12,887 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 410 transitions, 4904 flow [2024-06-21 16:26:12,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:12,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:12,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:12,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:26:12,887 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2028707740, now seen corresponding path program 1 times [2024-06-21 16:26:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:12,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620741263] [2024-06-21 16:26:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:12,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:13,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:13,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620741263] [2024-06-21 16:26:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620741263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:13,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:13,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:13,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665867835] [2024-06-21 16:26:13,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:13,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:13,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:13,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:26:13,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 410 transitions, 4904 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:13,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:13,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:26:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:15,923 INFO L124 PetriNetUnfolderBase]: 6130/9553 cut-off events. [2024-06-21 16:26:15,923 INFO L125 PetriNetUnfolderBase]: For 2002862/2002862 co-relation queries the response was YES. [2024-06-21 16:26:16,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85706 conditions, 9553 events. 6130/9553 cut-off events. For 2002862/2002862 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 59510 event pairs, 1598 based on Foata normal form. 2/9518 useless extension candidates. Maximal degree in co-relation 85541. Up to 9325 conditions per place. [2024-06-21 16:26:16,044 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 378 selfloop transitions, 17 changer transitions 0/426 dead transitions. [2024-06-21 16:26:16,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 426 transitions, 5794 flow [2024-06-21 16:26:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:26:16,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-21 16:26:16,045 INFO L175 Difference]: Start difference. First operand has 338 places, 410 transitions, 4904 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:26:16,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 426 transitions, 5794 flow [2024-06-21 16:26:20,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 426 transitions, 5667 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-21 16:26:20,884 INFO L231 Difference]: Finished difference. Result has 337 places, 413 transitions, 4893 flow [2024-06-21 16:26:20,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4893, PETRI_PLACES=337, PETRI_TRANSITIONS=413} [2024-06-21 16:26:20,884 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 293 predicate places. [2024-06-21 16:26:20,885 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 413 transitions, 4893 flow [2024-06-21 16:26:20,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:20,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:20,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:20,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:26:20,885 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:20,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2028202285, now seen corresponding path program 4 times [2024-06-21 16:26:20,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:20,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435558142] [2024-06-21 16:26:20,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:20,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:21,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:21,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435558142] [2024-06-21 16:26:21,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435558142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:21,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:21,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:21,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682191097] [2024-06-21 16:26:21,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:21,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:21,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:21,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:26:21,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 413 transitions, 4893 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:21,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:21,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:26:21,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:23,724 INFO L124 PetriNetUnfolderBase]: 6214/9671 cut-off events. [2024-06-21 16:26:23,724 INFO L125 PetriNetUnfolderBase]: For 2057991/2057994 co-relation queries the response was YES. [2024-06-21 16:26:23,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87108 conditions, 9671 events. 6214/9671 cut-off events. For 2057991/2057994 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 60301 event pairs, 1595 based on Foata normal form. 8/9641 useless extension candidates. Maximal degree in co-relation 86942. Up to 9350 conditions per place. [2024-06-21 16:26:23,876 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 372 selfloop transitions, 34 changer transitions 0/437 dead transitions. [2024-06-21 16:26:23,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 437 transitions, 6110 flow [2024-06-21 16:26:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:26:23,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-21 16:26:23,877 INFO L175 Difference]: Start difference. First operand has 337 places, 413 transitions, 4893 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:26:23,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 437 transitions, 6110 flow [2024-06-21 16:26:28,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 437 transitions, 6004 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:26:28,471 INFO L231 Difference]: Finished difference. Result has 340 places, 421 transitions, 5031 flow [2024-06-21 16:26:28,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4789, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5031, PETRI_PLACES=340, PETRI_TRANSITIONS=421} [2024-06-21 16:26:28,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 296 predicate places. [2024-06-21 16:26:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 421 transitions, 5031 flow [2024-06-21 16:26:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:28,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:28,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:28,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:26:28,472 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:28,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash 2013470155, now seen corresponding path program 5 times [2024-06-21 16:26:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:28,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675717193] [2024-06-21 16:26:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:29,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675717193] [2024-06-21 16:26:29,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675717193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:29,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:29,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:29,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367898194] [2024-06-21 16:26:29,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:29,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:29,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:29,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:26:29,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 421 transitions, 5031 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:29,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:29,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:26:29,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:31,253 INFO L124 PetriNetUnfolderBase]: 6250/9722 cut-off events. [2024-06-21 16:26:31,253 INFO L125 PetriNetUnfolderBase]: For 2060064/2060067 co-relation queries the response was YES. [2024-06-21 16:26:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87628 conditions, 9722 events. 6250/9722 cut-off events. For 2060064/2060067 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 60640 event pairs, 1598 based on Foata normal form. 8/9692 useless extension candidates. Maximal degree in co-relation 87460. Up to 9255 conditions per place. [2024-06-21 16:26:31,402 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 361 selfloop transitions, 52 changer transitions 0/444 dead transitions. [2024-06-21 16:26:31,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 444 transitions, 6431 flow [2024-06-21 16:26:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:31,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:26:31,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:26:31,403 INFO L175 Difference]: Start difference. First operand has 340 places, 421 transitions, 5031 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:26:31,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 444 transitions, 6431 flow [2024-06-21 16:26:36,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 444 transitions, 6290 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-21 16:26:36,427 INFO L231 Difference]: Finished difference. Result has 343 places, 425 transitions, 5086 flow [2024-06-21 16:26:36,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5086, PETRI_PLACES=343, PETRI_TRANSITIONS=425} [2024-06-21 16:26:36,427 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 16:26:36,427 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 425 transitions, 5086 flow [2024-06-21 16:26:36,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:36,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:36,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:36,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:26:36,427 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:36,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:36,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2013456732, now seen corresponding path program 3 times [2024-06-21 16:26:36,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:36,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747614338] [2024-06-21 16:26:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:36,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:37,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:37,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747614338] [2024-06-21 16:26:37,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747614338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:37,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:37,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:37,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215429739] [2024-06-21 16:26:37,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:37,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:37,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:26:37,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 425 transitions, 5086 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:37,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:37,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:26:37,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:39,399 INFO L124 PetriNetUnfolderBase]: 6244/9714 cut-off events. [2024-06-21 16:26:39,399 INFO L125 PetriNetUnfolderBase]: For 2058662/2058665 co-relation queries the response was YES. [2024-06-21 16:26:39,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87315 conditions, 9714 events. 6244/9714 cut-off events. For 2058662/2058665 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 60566 event pairs, 1606 based on Foata normal form. 4/9680 useless extension candidates. Maximal degree in co-relation 87147. Up to 9456 conditions per place. [2024-06-21 16:26:39,548 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 370 selfloop transitions, 35 changer transitions 0/436 dead transitions. [2024-06-21 16:26:39,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 436 transitions, 5922 flow [2024-06-21 16:26:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:26:39,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 16:26:39,549 INFO L175 Difference]: Start difference. First operand has 343 places, 425 transitions, 5086 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:26:39,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 436 transitions, 5922 flow [2024-06-21 16:26:44,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 436 transitions, 5610 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-21 16:26:44,535 INFO L231 Difference]: Finished difference. Result has 342 places, 425 transitions, 4851 flow [2024-06-21 16:26:44,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4851, PETRI_PLACES=342, PETRI_TRANSITIONS=425} [2024-06-21 16:26:44,535 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-21 16:26:44,535 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 425 transitions, 4851 flow [2024-06-21 16:26:44,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:44,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:44,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:44,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:26:44,536 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:44,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:44,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2013457135, now seen corresponding path program 6 times [2024-06-21 16:26:44,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:44,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617448823] [2024-06-21 16:26:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:45,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:45,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617448823] [2024-06-21 16:26:45,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617448823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:45,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:45,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:45,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846041430] [2024-06-21 16:26:45,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:45,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:45,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:45,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:26:45,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 425 transitions, 4851 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:45,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:45,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:26:45,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:47,259 INFO L124 PetriNetUnfolderBase]: 6226/9690 cut-off events. [2024-06-21 16:26:47,259 INFO L125 PetriNetUnfolderBase]: For 2080340/2080343 co-relation queries the response was YES. [2024-06-21 16:26:47,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85889 conditions, 9690 events. 6226/9690 cut-off events. For 2080340/2080343 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 60423 event pairs, 1584 based on Foata normal form. 8/9660 useless extension candidates. Maximal degree in co-relation 85723. Up to 9236 conditions per place. [2024-06-21 16:26:47,406 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 355 selfloop transitions, 57 changer transitions 0/443 dead transitions. [2024-06-21 16:26:47,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 5947 flow [2024-06-21 16:26:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:26:47,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:26:47,407 INFO L175 Difference]: Start difference. First operand has 342 places, 425 transitions, 4851 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:26:47,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 5947 flow [2024-06-21 16:26:51,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 443 transitions, 5827 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:26:51,765 INFO L231 Difference]: Finished difference. Result has 343 places, 425 transitions, 4852 flow [2024-06-21 16:26:51,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4731, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4852, PETRI_PLACES=343, PETRI_TRANSITIONS=425} [2024-06-21 16:26:51,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-21 16:26:51,765 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 425 transitions, 4852 flow [2024-06-21 16:26:51,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:51,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:51,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:51,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:26:51,766 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:51,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:51,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1745898020, now seen corresponding path program 1 times [2024-06-21 16:26:51,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:51,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320751181] [2024-06-21 16:26:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:51,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:52,447 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 16:26:52,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:52,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320751181] [2024-06-21 16:26:52,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320751181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:52,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:52,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:52,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899482721] [2024-06-21 16:26:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:52,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:52,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:52,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:52,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:52,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:26:52,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 425 transitions, 4852 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:52,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:52,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:26:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:26:54,726 INFO L124 PetriNetUnfolderBase]: 6460/9950 cut-off events. [2024-06-21 16:26:54,726 INFO L125 PetriNetUnfolderBase]: For 2082216/2082216 co-relation queries the response was YES. [2024-06-21 16:26:54,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87514 conditions, 9950 events. 6460/9950 cut-off events. For 2082216/2082216 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61041 event pairs, 1640 based on Foata normal form. 1/9949 useless extension candidates. Maximal degree in co-relation 87347. Up to 9882 conditions per place. [2024-06-21 16:26:54,874 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 35 changer transitions 0/452 dead transitions. [2024-06-21 16:26:54,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 452 transitions, 6118 flow [2024-06-21 16:26:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:26:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:26:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:26:54,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 16:26:54,875 INFO L175 Difference]: Start difference. First operand has 343 places, 425 transitions, 4852 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:26:54,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 452 transitions, 6118 flow [2024-06-21 16:26:58,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 452 transitions, 5967 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:26:58,585 INFO L231 Difference]: Finished difference. Result has 345 places, 431 transitions, 4871 flow [2024-06-21 16:26:58,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4701, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4871, PETRI_PLACES=345, PETRI_TRANSITIONS=431} [2024-06-21 16:26:58,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-21 16:26:58,586 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 431 transitions, 4871 flow [2024-06-21 16:26:58,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:58,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:26:58,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:26:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:26:58,586 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:26:58,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:26:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1012850281, now seen corresponding path program 1 times [2024-06-21 16:26:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:26:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863331942] [2024-06-21 16:26:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:26:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:26:58,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:26:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:26:59,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:26:59,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863331942] [2024-06-21 16:26:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863331942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:26:59,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:26:59,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:26:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070768035] [2024-06-21 16:26:59,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:26:59,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:26:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:26:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:26:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:26:59,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:26:59,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 431 transitions, 4871 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:26:59,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:26:59,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:26:59,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:01,570 INFO L124 PetriNetUnfolderBase]: 6475/9971 cut-off events. [2024-06-21 16:27:01,570 INFO L125 PetriNetUnfolderBase]: For 2133183/2133183 co-relation queries the response was YES. [2024-06-21 16:27:01,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88318 conditions, 9971 events. 6475/9971 cut-off events. For 2133183/2133183 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61138 event pairs, 1646 based on Foata normal form. 3/9972 useless extension candidates. Maximal degree in co-relation 88150. Up to 9840 conditions per place. [2024-06-21 16:27:01,733 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 410 selfloop transitions, 48 changer transitions 0/461 dead transitions. [2024-06-21 16:27:01,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 461 transitions, 6169 flow [2024-06-21 16:27:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:27:01,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-21 16:27:01,734 INFO L175 Difference]: Start difference. First operand has 345 places, 431 transitions, 4871 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:27:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 461 transitions, 6169 flow [2024-06-21 16:27:05,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 461 transitions, 6069 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 16:27:05,673 INFO L231 Difference]: Finished difference. Result has 349 places, 437 transitions, 4971 flow [2024-06-21 16:27:05,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4971, PETRI_PLACES=349, PETRI_TRANSITIONS=437} [2024-06-21 16:27:05,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 305 predicate places. [2024-06-21 16:27:05,674 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 437 transitions, 4971 flow [2024-06-21 16:27:05,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:05,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:05,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:05,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:27:05,674 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:05,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:05,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1012850498, now seen corresponding path program 2 times [2024-06-21 16:27:05,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:05,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766648718] [2024-06-21 16:27:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:05,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766648718] [2024-06-21 16:27:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766648718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:06,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:06,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665513565] [2024-06-21 16:27:06,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:06,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:06,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:06,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 437 transitions, 4971 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:06,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:06,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:06,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:08,625 INFO L124 PetriNetUnfolderBase]: 6480/9978 cut-off events. [2024-06-21 16:27:08,625 INFO L125 PetriNetUnfolderBase]: For 2154595/2154595 co-relation queries the response was YES. [2024-06-21 16:27:08,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88590 conditions, 9978 events. 6480/9978 cut-off events. For 2154595/2154595 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61259 event pairs, 1652 based on Foata normal form. 1/9977 useless extension candidates. Maximal degree in co-relation 88420. Up to 9909 conditions per place. [2024-06-21 16:27:08,777 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 419 selfloop transitions, 36 changer transitions 0/458 dead transitions. [2024-06-21 16:27:08,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 458 transitions, 6185 flow [2024-06-21 16:27:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:08,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:27:08,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-21 16:27:08,777 INFO L175 Difference]: Start difference. First operand has 349 places, 437 transitions, 4971 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:27:08,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 458 transitions, 6185 flow [2024-06-21 16:27:13,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 458 transitions, 6094 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 16:27:13,500 INFO L231 Difference]: Finished difference. Result has 353 places, 440 transitions, 4986 flow [2024-06-21 16:27:13,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4880, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4986, PETRI_PLACES=353, PETRI_TRANSITIONS=440} [2024-06-21 16:27:13,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-21 16:27:13,501 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 440 transitions, 4986 flow [2024-06-21 16:27:13,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:13,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:13,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:13,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:27:13,501 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:13,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:13,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1007286308, now seen corresponding path program 3 times [2024-06-21 16:27:13,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:13,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91089710] [2024-06-21 16:27:13,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:13,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:14,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:14,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91089710] [2024-06-21 16:27:14,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91089710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:14,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:14,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:14,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719729544] [2024-06-21 16:27:14,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:14,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:14,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:14,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:14,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:14,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 440 transitions, 4986 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:14,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:14,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:14,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:17,059 INFO L124 PetriNetUnfolderBase]: 6485/9985 cut-off events. [2024-06-21 16:27:17,059 INFO L125 PetriNetUnfolderBase]: For 2189449/2189449 co-relation queries the response was YES. [2024-06-21 16:27:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88895 conditions, 9985 events. 6485/9985 cut-off events. For 2189449/2189449 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61302 event pairs, 1654 based on Foata normal form. 1/9984 useless extension candidates. Maximal degree in co-relation 88723. Up to 9915 conditions per place. [2024-06-21 16:27:17,265 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 417 selfloop transitions, 38 changer transitions 0/458 dead transitions. [2024-06-21 16:27:17,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 458 transitions, 6200 flow [2024-06-21 16:27:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:27:17,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-21 16:27:17,266 INFO L175 Difference]: Start difference. First operand has 353 places, 440 transitions, 4986 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:27:17,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 458 transitions, 6200 flow [2024-06-21 16:27:23,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 458 transitions, 6128 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:23,225 INFO L231 Difference]: Finished difference. Result has 356 places, 443 transitions, 5030 flow [2024-06-21 16:27:23,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5030, PETRI_PLACES=356, PETRI_TRANSITIONS=443} [2024-06-21 16:27:23,225 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-21 16:27:23,225 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 443 transitions, 5030 flow [2024-06-21 16:27:23,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:23,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:23,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:23,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:27:23,225 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:23,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1007278651, now seen corresponding path program 2 times [2024-06-21 16:27:23,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:23,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728606565] [2024-06-21 16:27:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:23,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:23,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:23,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:23,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728606565] [2024-06-21 16:27:23,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728606565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:23,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:23,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:23,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165022932] [2024-06-21 16:27:23,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:23,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:23,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:23,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:23,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:23,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 443 transitions, 5030 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:23,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:23,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:26,229 INFO L124 PetriNetUnfolderBase]: 6524/10039 cut-off events. [2024-06-21 16:27:26,229 INFO L125 PetriNetUnfolderBase]: For 2260340/2260340 co-relation queries the response was YES. [2024-06-21 16:27:26,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89901 conditions, 10039 events. 6524/10039 cut-off events. For 2260340/2260340 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 61514 event pairs, 1633 based on Foata normal form. 3/10040 useless extension candidates. Maximal degree in co-relation 89728. Up to 9889 conditions per place. [2024-06-21 16:27:26,388 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 420 selfloop transitions, 50 changer transitions 0/473 dead transitions. [2024-06-21 16:27:26,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 473 transitions, 6591 flow [2024-06-21 16:27:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:27:26,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 16:27:26,389 INFO L175 Difference]: Start difference. First operand has 356 places, 443 transitions, 5030 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:27:26,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 473 transitions, 6591 flow [2024-06-21 16:27:31,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 473 transitions, 6519 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:31,791 INFO L231 Difference]: Finished difference. Result has 359 places, 449 transitions, 5149 flow [2024-06-21 16:27:31,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5149, PETRI_PLACES=359, PETRI_TRANSITIONS=449} [2024-06-21 16:27:31,792 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 315 predicate places. [2024-06-21 16:27:31,792 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 449 transitions, 5149 flow [2024-06-21 16:27:31,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:31,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:31,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:31,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:27:31,792 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:31,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:31,792 INFO L85 PathProgramCache]: Analyzing trace with hash 379874313, now seen corresponding path program 3 times [2024-06-21 16:27:31,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689850698] [2024-06-21 16:27:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:31,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:32,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689850698] [2024-06-21 16:27:32,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689850698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:32,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:32,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:32,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139507013] [2024-06-21 16:27:32,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:32,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:32,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:32,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:32,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:32,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:32,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 449 transitions, 5149 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:32,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:32,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:32,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:34,863 INFO L124 PetriNetUnfolderBase]: 6515/10027 cut-off events. [2024-06-21 16:27:34,863 INFO L125 PetriNetUnfolderBase]: For 2276405/2276405 co-relation queries the response was YES. [2024-06-21 16:27:34,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89853 conditions, 10027 events. 6515/10027 cut-off events. For 2276405/2276405 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61483 event pairs, 1633 based on Foata normal form. 3/10028 useless extension candidates. Maximal degree in co-relation 89679. Up to 9882 conditions per place. [2024-06-21 16:27:35,028 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 422 selfloop transitions, 49 changer transitions 0/474 dead transitions. [2024-06-21 16:27:35,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 474 transitions, 6398 flow [2024-06-21 16:27:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:35,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:27:35,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-21 16:27:35,029 INFO L175 Difference]: Start difference. First operand has 359 places, 449 transitions, 5149 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:27:35,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 474 transitions, 6398 flow [2024-06-21 16:27:39,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 474 transitions, 6278 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:27:39,527 INFO L231 Difference]: Finished difference. Result has 363 places, 449 transitions, 5133 flow [2024-06-21 16:27:39,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5029, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5133, PETRI_PLACES=363, PETRI_TRANSITIONS=449} [2024-06-21 16:27:39,528 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 319 predicate places. [2024-06-21 16:27:39,528 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 449 transitions, 5133 flow [2024-06-21 16:27:39,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:39,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:39,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:27:39,529 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:39,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash 963764937, now seen corresponding path program 4 times [2024-06-21 16:27:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657741770] [2024-06-21 16:27:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:40,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:40,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657741770] [2024-06-21 16:27:40,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657741770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:40,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:40,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:40,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426897354] [2024-06-21 16:27:40,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:40,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:40,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:40,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:40,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:40,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 449 transitions, 5133 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:40,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:40,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:40,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:42,514 INFO L124 PetriNetUnfolderBase]: 6530/10049 cut-off events. [2024-06-21 16:27:42,515 INFO L125 PetriNetUnfolderBase]: For 2312603/2312606 co-relation queries the response was YES. [2024-06-21 16:27:42,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90184 conditions, 10049 events. 6530/10049 cut-off events. For 2312603/2312606 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61586 event pairs, 1634 based on Foata normal form. 3/10049 useless extension candidates. Maximal degree in co-relation 90009. Up to 9896 conditions per place. [2024-06-21 16:27:42,672 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 412 selfloop transitions, 55 changer transitions 0/470 dead transitions. [2024-06-21 16:27:42,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 470 transitions, 6407 flow [2024-06-21 16:27:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:27:42,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-21 16:27:42,674 INFO L175 Difference]: Start difference. First operand has 363 places, 449 transitions, 5133 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:27:42,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 470 transitions, 6407 flow [2024-06-21 16:27:47,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 470 transitions, 6293 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:27:47,214 INFO L231 Difference]: Finished difference. Result has 364 places, 452 transitions, 5187 flow [2024-06-21 16:27:47,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5187, PETRI_PLACES=364, PETRI_TRANSITIONS=452} [2024-06-21 16:27:47,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-21 16:27:47,214 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 452 transitions, 5187 flow [2024-06-21 16:27:47,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:47,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:47,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:47,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:27:47,215 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:47,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:47,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2019190213, now seen corresponding path program 5 times [2024-06-21 16:27:47,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:47,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863270340] [2024-06-21 16:27:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:47,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863270340] [2024-06-21 16:27:47,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863270340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:47,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:47,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:47,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322979151] [2024-06-21 16:27:47,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:47,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:47,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:48,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:48,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 452 transitions, 5187 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:48,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:48,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:48,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:50,669 INFO L124 PetriNetUnfolderBase]: 6545/10070 cut-off events. [2024-06-21 16:27:50,670 INFO L125 PetriNetUnfolderBase]: For 2349652/2349655 co-relation queries the response was YES. [2024-06-21 16:27:50,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90654 conditions, 10070 events. 6545/10070 cut-off events. For 2349652/2349655 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61722 event pairs, 1635 based on Foata normal form. 3/10070 useless extension candidates. Maximal degree in co-relation 90478. Up to 9910 conditions per place. [2024-06-21 16:27:50,807 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 419 selfloop transitions, 55 changer transitions 0/477 dead transitions. [2024-06-21 16:27:50,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 477 transitions, 6494 flow [2024-06-21 16:27:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:27:50,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-21 16:27:50,808 INFO L175 Difference]: Start difference. First operand has 364 places, 452 transitions, 5187 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:27:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 477 transitions, 6494 flow [2024-06-21 16:27:54,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 477 transitions, 6361 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:27:54,926 INFO L231 Difference]: Finished difference. Result has 367 places, 455 transitions, 5222 flow [2024-06-21 16:27:54,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5069, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5222, PETRI_PLACES=367, PETRI_TRANSITIONS=455} [2024-06-21 16:27:54,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-21 16:27:54,926 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 455 transitions, 5222 flow [2024-06-21 16:27:54,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:54,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:54,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:54,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:27:54,927 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:27:54,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:54,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2019182556, now seen corresponding path program 4 times [2024-06-21 16:27:54,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:54,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564447605] [2024-06-21 16:27:54,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:54,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:55,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564447605] [2024-06-21 16:27:55,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564447605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:55,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:55,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:27:55,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507400159] [2024-06-21 16:27:55,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:55,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:27:55,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:55,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:27:55,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:27:55,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:27:55,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 455 transitions, 5222 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:55,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:55,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:27:55,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:57,926 INFO L124 PetriNetUnfolderBase]: 6542/10066 cut-off events. [2024-06-21 16:27:57,927 INFO L125 PetriNetUnfolderBase]: For 2363936/2363939 co-relation queries the response was YES. [2024-06-21 16:27:58,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90670 conditions, 10066 events. 6542/10066 cut-off events. For 2363936/2363939 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 61801 event pairs, 1648 based on Foata normal form. 1/10064 useless extension candidates. Maximal degree in co-relation 90493. Up to 9996 conditions per place. [2024-06-21 16:27:58,090 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 425 selfloop transitions, 38 changer transitions 0/466 dead transitions. [2024-06-21 16:27:58,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 466 transitions, 6174 flow [2024-06-21 16:27:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:27:58,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3691860465116279 [2024-06-21 16:27:58,091 INFO L175 Difference]: Start difference. First operand has 367 places, 455 transitions, 5222 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:27:58,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 466 transitions, 6174 flow [2024-06-21 16:28:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 466 transitions, 5990 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:03,035 INFO L231 Difference]: Finished difference. Result has 368 places, 455 transitions, 5120 flow [2024-06-21 16:28:03,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5038, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5120, PETRI_PLACES=368, PETRI_TRANSITIONS=455} [2024-06-21 16:28:03,035 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-21 16:28:03,035 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 455 transitions, 5120 flow [2024-06-21 16:28:03,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:03,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:03,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:28:03,035 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:28:03,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2019182773, now seen corresponding path program 6 times [2024-06-21 16:28:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:03,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681234944] [2024-06-21 16:28:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:03,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:03,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681234944] [2024-06-21 16:28:03,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681234944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:03,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:03,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:03,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928849502] [2024-06-21 16:28:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:03,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:03,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:03,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:03,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:03,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:28:03,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 455 transitions, 5120 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:03,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:03,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:28:03,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:06,137 INFO L124 PetriNetUnfolderBase]: 6533/10054 cut-off events. [2024-06-21 16:28:06,137 INFO L125 PetriNetUnfolderBase]: For 2392120/2392123 co-relation queries the response was YES. [2024-06-21 16:28:06,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90383 conditions, 10054 events. 6533/10054 cut-off events. For 2392120/2392123 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 61605 event pairs, 1633 based on Foata normal form. 3/10054 useless extension candidates. Maximal degree in co-relation 90205. Up to 9899 conditions per place. [2024-06-21 16:28:06,344 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 414 selfloop transitions, 57 changer transitions 0/474 dead transitions. [2024-06-21 16:28:06,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 474 transitions, 6115 flow [2024-06-21 16:28:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:06,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:28:06,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-21 16:28:06,345 INFO L175 Difference]: Start difference. First operand has 368 places, 455 transitions, 5120 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:28:06,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 474 transitions, 6115 flow [2024-06-21 16:28:11,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 474 transitions, 5967 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-21 16:28:11,953 INFO L231 Difference]: Finished difference. Result has 366 places, 455 transitions, 5092 flow [2024-06-21 16:28:11,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4972, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5092, PETRI_PLACES=366, PETRI_TRANSITIONS=455} [2024-06-21 16:28:11,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-21 16:28:11,953 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 455 transitions, 5092 flow [2024-06-21 16:28:11,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:11,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:11,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:11,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:28:11,953 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:28:11,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:11,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2028725596, now seen corresponding path program 1 times [2024-06-21 16:28:11,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:11,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622007829] [2024-06-21 16:28:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:11,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:11,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:12,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622007829] [2024-06-21 16:28:12,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622007829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:12,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:12,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254451145] [2024-06-21 16:28:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:12,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:12,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:13,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:28:13,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 455 transitions, 5092 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:13,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:13,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:28:13,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:15,303 INFO L124 PetriNetUnfolderBase]: 6294/9787 cut-off events. [2024-06-21 16:28:15,304 INFO L125 PetriNetUnfolderBase]: For 2406192/2406192 co-relation queries the response was YES. [2024-06-21 16:28:15,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89203 conditions, 9787 events. 6294/9787 cut-off events. For 2406192/2406192 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 60906 event pairs, 1588 based on Foata normal form. 2/9752 useless extension candidates. Maximal degree in co-relation 89025. Up to 9536 conditions per place. [2024-06-21 16:28:15,480 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 417 selfloop transitions, 16 changer transitions 0/470 dead transitions. [2024-06-21 16:28:15,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 470 transitions, 6040 flow [2024-06-21 16:28:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:28:15,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:28:15,481 INFO L175 Difference]: Start difference. First operand has 366 places, 455 transitions, 5092 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:28:15,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 470 transitions, 6040 flow [2024-06-21 16:28:22,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 470 transitions, 5889 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:28:22,064 INFO L231 Difference]: Finished difference. Result has 366 places, 457 transitions, 5034 flow [2024-06-21 16:28:22,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4941, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5034, PETRI_PLACES=366, PETRI_TRANSITIONS=457} [2024-06-21 16:28:22,064 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-21 16:28:22,064 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 457 transitions, 5034 flow [2024-06-21 16:28:22,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:22,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:22,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:22,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:28:22,064 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:28:22,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash -117864672, now seen corresponding path program 1 times [2024-06-21 16:28:22,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:22,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152494367] [2024-06-21 16:28:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:22,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152494367] [2024-06-21 16:28:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152494367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:23,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:23,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:23,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238613144] [2024-06-21 16:28:23,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:23,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:23,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:23,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:28:23,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 457 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:23,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:28:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:25,784 INFO L124 PetriNetUnfolderBase]: 6324/9832 cut-off events. [2024-06-21 16:28:25,784 INFO L125 PetriNetUnfolderBase]: For 2476285/2476288 co-relation queries the response was YES. [2024-06-21 16:28:25,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90127 conditions, 9832 events. 6324/9832 cut-off events. For 2476285/2476288 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 61033 event pairs, 1401 based on Foata normal form. 6/9800 useless extension candidates. Maximal degree in co-relation 89948. Up to 9311 conditions per place. [2024-06-21 16:28:25,938 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 379 selfloop transitions, 83 changer transitions 0/499 dead transitions. [2024-06-21 16:28:25,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 499 transitions, 6434 flow [2024-06-21 16:28:25,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 16:28:25,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-21 16:28:25,940 INFO L175 Difference]: Start difference. First operand has 366 places, 457 transitions, 5034 flow. Second operand 9 states and 175 transitions. [2024-06-21 16:28:25,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 499 transitions, 6434 flow [2024-06-21 16:28:32,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 499 transitions, 6357 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:32,067 INFO L231 Difference]: Finished difference. Result has 369 places, 463 transitions, 5271 flow [2024-06-21 16:28:32,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5271, PETRI_PLACES=369, PETRI_TRANSITIONS=463} [2024-06-21 16:28:32,067 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-21 16:28:32,067 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 463 transitions, 5271 flow [2024-06-21 16:28:32,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:32,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:32,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:28:32,068 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:28:32,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -868611918, now seen corresponding path program 1 times [2024-06-21 16:28:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:32,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754680320] [2024-06-21 16:28:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:32,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:32,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:33,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:33,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754680320] [2024-06-21 16:28:33,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754680320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:33,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:33,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:33,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761921039] [2024-06-21 16:28:33,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:33,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:33,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:33,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:33,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:33,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:28:33,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 463 transitions, 5271 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:33,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:33,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:28:33,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:35,527 INFO L124 PetriNetUnfolderBase]: 6406/9941 cut-off events. [2024-06-21 16:28:35,527 INFO L125 PetriNetUnfolderBase]: For 2573428/2573431 co-relation queries the response was YES. [2024-06-21 16:28:35,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92288 conditions, 9941 events. 6406/9941 cut-off events. For 2573428/2573431 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 61969 event pairs, 1576 based on Foata normal form. 8/9911 useless extension candidates. Maximal degree in co-relation 92108. Up to 9041 conditions per place. [2024-06-21 16:28:35,681 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 356 selfloop transitions, 122 changer transitions 0/515 dead transitions. [2024-06-21 16:28:35,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 515 transitions, 7009 flow [2024-06-21 16:28:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:28:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:28:35,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 16:28:35,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-21 16:28:35,682 INFO L175 Difference]: Start difference. First operand has 369 places, 463 transitions, 5271 flow. Second operand 11 states and 214 transitions. [2024-06-21 16:28:35,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 515 transitions, 7009 flow [2024-06-21 16:28:40,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 515 transitions, 6814 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:40,810 INFO L231 Difference]: Finished difference. Result has 376 places, 473 transitions, 5536 flow [2024-06-21 16:28:40,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5536, PETRI_PLACES=376, PETRI_TRANSITIONS=473} [2024-06-21 16:28:40,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 332 predicate places. [2024-06-21 16:28:40,811 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 473 transitions, 5536 flow [2024-06-21 16:28:40,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:40,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:40,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:40,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:28:40,811 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:28:40,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:40,811 INFO L85 PathProgramCache]: Analyzing trace with hash -868612290, now seen corresponding path program 2 times [2024-06-21 16:28:40,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:40,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773270116] [2024-06-21 16:28:40,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:40,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:41,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:41,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773270116] [2024-06-21 16:28:41,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773270116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:41,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:41,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:41,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025089060] [2024-06-21 16:28:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:41,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:41,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:28:41,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 473 transitions, 5536 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:41,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:41,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:28:41,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:44,142 INFO L124 PetriNetUnfolderBase]: 6424/9971 cut-off events. [2024-06-21 16:28:44,142 INFO L125 PetriNetUnfolderBase]: For 2595499/2595502 co-relation queries the response was YES. [2024-06-21 16:28:44,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94189 conditions, 9971 events. 6424/9971 cut-off events. For 2595499/2595502 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 62150 event pairs, 1614 based on Foata normal form. 6/9939 useless extension candidates. Maximal degree in co-relation 94006. Up to 9522 conditions per place. [2024-06-21 16:28:44,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 82 changer transitions 0/511 dead transitions. [2024-06-21 16:28:44,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 511 transitions, 6635 flow [2024-06-21 16:28:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:28:44,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-21 16:28:44,329 INFO L175 Difference]: Start difference. First operand has 376 places, 473 transitions, 5536 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:28:44,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 511 transitions, 6635 flow [2024-06-21 16:28:51,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 511 transitions, 6384 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:51,627 INFO L231 Difference]: Finished difference. Result has 378 places, 480 transitions, 5534 flow [2024-06-21 16:28:51,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5534, PETRI_PLACES=378, PETRI_TRANSITIONS=480} [2024-06-21 16:28:51,627 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-21 16:28:51,627 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 480 transitions, 5534 flow [2024-06-21 16:28:51,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:51,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:51,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:51,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:28:51,627 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:28:51,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:51,628 INFO L85 PathProgramCache]: Analyzing trace with hash -107389152, now seen corresponding path program 3 times [2024-06-21 16:28:51,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:51,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626450088] [2024-06-21 16:28:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:51,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:53,043 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 16:28:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:53,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626450088] [2024-06-21 16:28:53,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626450088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:53,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:53,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:53,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527392092] [2024-06-21 16:28:53,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:53,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:28:53,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 480 transitions, 5534 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:53,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:53,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:28:53,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:55,435 INFO L124 PetriNetUnfolderBase]: 6440/9995 cut-off events. [2024-06-21 16:28:55,436 INFO L125 PetriNetUnfolderBase]: For 2632280/2632283 co-relation queries the response was YES. [2024-06-21 16:28:55,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94434 conditions, 9995 events. 6440/9995 cut-off events. For 2632280/2632283 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 62375 event pairs, 1614 based on Foata normal form. 6/9963 useless extension candidates. Maximal degree in co-relation 94249. Up to 9588 conditions per place. [2024-06-21 16:28:55,583 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 404 selfloop transitions, 67 changer transitions 0/508 dead transitions. [2024-06-21 16:28:55,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 508 transitions, 6584 flow [2024-06-21 16:28:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:28:55,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 16:28:55,585 INFO L175 Difference]: Start difference. First operand has 378 places, 480 transitions, 5534 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:28:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 508 transitions, 6584 flow [2024-06-21 16:29:03,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 508 transitions, 6421 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:03,269 INFO L231 Difference]: Finished difference. Result has 382 places, 483 transitions, 5563 flow [2024-06-21 16:29:03,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5371, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5563, PETRI_PLACES=382, PETRI_TRANSITIONS=483} [2024-06-21 16:29:03,270 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-21 16:29:03,270 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 483 transitions, 5563 flow [2024-06-21 16:29:03,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:03,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:03,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:03,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:29:03,270 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:29:03,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash 465180, now seen corresponding path program 1 times [2024-06-21 16:29:03,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:03,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487649252] [2024-06-21 16:29:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:03,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:04,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487649252] [2024-06-21 16:29:04,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487649252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:04,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:04,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:04,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341397571] [2024-06-21 16:29:04,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:04,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:04,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:04,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:04,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:29:04,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 483 transitions, 5563 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:04,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:04,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:29:04,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:06,303 INFO L124 PetriNetUnfolderBase]: 6695/10285 cut-off events. [2024-06-21 16:29:06,303 INFO L125 PetriNetUnfolderBase]: For 2672087/2672090 co-relation queries the response was YES. [2024-06-21 16:29:06,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96425 conditions, 10285 events. 6695/10285 cut-off events. For 2672087/2672090 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 63114 event pairs, 1659 based on Foata normal form. 2/10284 useless extension candidates. Maximal degree in co-relation 96239. Up to 9974 conditions per place. [2024-06-21 16:29:06,567 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 439 selfloop transitions, 78 changer transitions 0/520 dead transitions. [2024-06-21 16:29:06,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 520 transitions, 7421 flow [2024-06-21 16:29:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:29:06,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-21 16:29:06,568 INFO L175 Difference]: Start difference. First operand has 382 places, 483 transitions, 5563 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:29:06,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 520 transitions, 7421 flow [2024-06-21 16:29:14,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 520 transitions, 7232 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:29:14,739 INFO L231 Difference]: Finished difference. Result has 383 places, 494 transitions, 5769 flow [2024-06-21 16:29:14,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5374, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5769, PETRI_PLACES=383, PETRI_TRANSITIONS=494} [2024-06-21 16:29:14,740 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 339 predicate places. [2024-06-21 16:29:14,740 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 494 transitions, 5769 flow [2024-06-21 16:29:14,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:14,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:14,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:14,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:29:14,740 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:29:14,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:14,741 INFO L85 PathProgramCache]: Analyzing trace with hash 228545820, now seen corresponding path program 2 times [2024-06-21 16:29:14,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:14,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167145894] [2024-06-21 16:29:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:15,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:15,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167145894] [2024-06-21 16:29:15,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167145894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:15,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:15,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:15,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741627640] [2024-06-21 16:29:15,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:15,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:15,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:15,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:15,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:15,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:29:15,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 494 transitions, 5769 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:15,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:15,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:29:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:18,070 INFO L124 PetriNetUnfolderBase]: 6705/10299 cut-off events. [2024-06-21 16:29:18,070 INFO L125 PetriNetUnfolderBase]: For 2718018/2718021 co-relation queries the response was YES. [2024-06-21 16:29:18,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97559 conditions, 10299 events. 6705/10299 cut-off events. For 2718018/2718021 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 63194 event pairs, 1655 based on Foata normal form. 2/10298 useless extension candidates. Maximal degree in co-relation 97371. Up to 9984 conditions per place. [2024-06-21 16:29:18,237 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 438 selfloop transitions, 80 changer transitions 0/521 dead transitions. [2024-06-21 16:29:18,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 521 transitions, 7513 flow [2024-06-21 16:29:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:18,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:29:18,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-21 16:29:18,238 INFO L175 Difference]: Start difference. First operand has 383 places, 494 transitions, 5769 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:29:18,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 521 transitions, 7513 flow [2024-06-21 16:29:26,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 521 transitions, 7313 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:26,117 INFO L231 Difference]: Finished difference. Result has 388 places, 498 transitions, 5830 flow [2024-06-21 16:29:26,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5830, PETRI_PLACES=388, PETRI_TRANSITIONS=498} [2024-06-21 16:29:26,132 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 344 predicate places. [2024-06-21 16:29:26,132 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 498 transitions, 5830 flow [2024-06-21 16:29:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:26,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:26,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:26,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:29:26,133 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:29:26,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash 644918, now seen corresponding path program 1 times [2024-06-21 16:29:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481615784] [2024-06-21 16:29:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:26,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481615784] [2024-06-21 16:29:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481615784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:26,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:26,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:26,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682026260] [2024-06-21 16:29:26,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:26,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:26,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:26,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:26,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:29:26,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 498 transitions, 5830 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:26,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:26,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:29:26,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:29,685 INFO L124 PetriNetUnfolderBase]: 6586/10194 cut-off events. [2024-06-21 16:29:29,686 INFO L125 PetriNetUnfolderBase]: For 2869982/2869985 co-relation queries the response was YES. [2024-06-21 16:29:29,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98747 conditions, 10194 events. 6586/10194 cut-off events. For 2869982/2869985 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 63399 event pairs, 1594 based on Foata normal form. 8/10164 useless extension candidates. Maximal degree in co-relation 98557. Up to 9364 conditions per place. [2024-06-21 16:29:30,039 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 394 selfloop transitions, 104 changer transitions 0/539 dead transitions. [2024-06-21 16:29:30,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 539 transitions, 7618 flow [2024-06-21 16:29:30,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:29:30,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:29:30,040 INFO L175 Difference]: Start difference. First operand has 388 places, 498 transitions, 5830 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:29:30,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 539 transitions, 7618 flow [2024-06-21 16:29:37,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 539 transitions, 7449 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:37,082 INFO L231 Difference]: Finished difference. Result has 392 places, 511 transitions, 6104 flow [2024-06-21 16:29:37,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6104, PETRI_PLACES=392, PETRI_TRANSITIONS=511} [2024-06-21 16:29:37,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 348 predicate places. [2024-06-21 16:29:37,082 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 511 transitions, 6104 flow [2024-06-21 16:29:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:37,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:37,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:37,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:29:37,083 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:29:37,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash 895708966, now seen corresponding path program 3 times [2024-06-21 16:29:37,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:37,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587652802] [2024-06-21 16:29:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:37,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:37,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587652802] [2024-06-21 16:29:37,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587652802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:37,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:37,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:37,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360865786] [2024-06-21 16:29:37,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:37,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:29:37,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 511 transitions, 6104 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:37,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:37,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:29:37,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:40,681 INFO L124 PetriNetUnfolderBase]: 6833/10476 cut-off events. [2024-06-21 16:29:40,681 INFO L125 PetriNetUnfolderBase]: For 2894856/2894859 co-relation queries the response was YES. [2024-06-21 16:29:40,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101276 conditions, 10476 events. 6833/10476 cut-off events. For 2894856/2894859 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 64258 event pairs, 1672 based on Foata normal form. 2/10475 useless extension candidates. Maximal degree in co-relation 101084. Up to 10150 conditions per place. [2024-06-21 16:29:40,838 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 84 changer transitions 0/539 dead transitions. [2024-06-21 16:29:40,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 539 transitions, 7934 flow [2024-06-21 16:29:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:29:40,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-21 16:29:40,839 INFO L175 Difference]: Start difference. First operand has 392 places, 511 transitions, 6104 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:29:40,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 539 transitions, 7934 flow [2024-06-21 16:29:48,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 539 transitions, 7809 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:29:48,451 INFO L231 Difference]: Finished difference. Result has 396 places, 518 transitions, 6260 flow [2024-06-21 16:29:48,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5979, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6260, PETRI_PLACES=396, PETRI_TRANSITIONS=518} [2024-06-21 16:29:48,451 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-21 16:29:48,451 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 518 transitions, 6260 flow [2024-06-21 16:29:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:48,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:48,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:48,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:29:48,452 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:29:48,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:48,452 INFO L85 PathProgramCache]: Analyzing trace with hash -833795554, now seen corresponding path program 2 times [2024-06-21 16:29:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:48,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556824448] [2024-06-21 16:29:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:49,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:49,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556824448] [2024-06-21 16:29:49,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556824448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:49,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:49,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219362600] [2024-06-21 16:29:49,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:49,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:49,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:49,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:49,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:29:49,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 518 transitions, 6260 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:49,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:49,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:29:49,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:52,248 INFO L124 PetriNetUnfolderBase]: 6640/10270 cut-off events. [2024-06-21 16:29:52,248 INFO L125 PetriNetUnfolderBase]: For 2973129/2973132 co-relation queries the response was YES. [2024-06-21 16:29:52,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100432 conditions, 10270 events. 6640/10270 cut-off events. For 2973129/2973132 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 63889 event pairs, 1625 based on Foata normal form. 8/10240 useless extension candidates. Maximal degree in co-relation 100239. Up to 9412 conditions per place. [2024-06-21 16:29:52,445 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 408 selfloop transitions, 96 changer transitions 0/547 dead transitions. [2024-06-21 16:29:52,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 547 transitions, 7933 flow [2024-06-21 16:29:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:29:52,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-21 16:29:52,446 INFO L175 Difference]: Start difference. First operand has 396 places, 518 transitions, 6260 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:29:52,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 547 transitions, 7933 flow [2024-06-21 16:30:00,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 547 transitions, 7794 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:30:00,405 INFO L231 Difference]: Finished difference. Result has 400 places, 522 transitions, 6382 flow [2024-06-21 16:30:00,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6121, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6382, PETRI_PLACES=400, PETRI_TRANSITIONS=522} [2024-06-21 16:30:00,405 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-21 16:30:00,405 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 522 transitions, 6382 flow [2024-06-21 16:30:00,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:00,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:00,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:00,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:30:00,405 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:30:00,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:00,406 INFO L85 PathProgramCache]: Analyzing trace with hash -514225870, now seen corresponding path program 3 times [2024-06-21 16:30:00,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:00,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618471827] [2024-06-21 16:30:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:00,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:01,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:01,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618471827] [2024-06-21 16:30:01,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618471827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:01,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:01,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:30:01,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136474226] [2024-06-21 16:30:01,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:01,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:30:01,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:01,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:30:01,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:30:01,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:30:01,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 522 transitions, 6382 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:01,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:01,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:30:01,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:03,957 INFO L124 PetriNetUnfolderBase]: 6622/10246 cut-off events. [2024-06-21 16:30:03,957 INFO L125 PetriNetUnfolderBase]: For 2963621/2963624 co-relation queries the response was YES. [2024-06-21 16:30:04,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100051 conditions, 10246 events. 6622/10246 cut-off events. For 2963621/2963624 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 63779 event pairs, 1621 based on Foata normal form. 8/10216 useless extension candidates. Maximal degree in co-relation 99857. Up to 9401 conditions per place. [2024-06-21 16:30:04,145 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 410 selfloop transitions, 96 changer transitions 0/549 dead transitions. [2024-06-21 16:30:04,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 549 transitions, 8016 flow [2024-06-21 16:30:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:30:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:30:04,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:30:04,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-21 16:30:04,146 INFO L175 Difference]: Start difference. First operand has 400 places, 522 transitions, 6382 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:30:04,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 549 transitions, 8016 flow [2024-06-21 16:30:12,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 549 transitions, 7845 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:30:12,686 INFO L231 Difference]: Finished difference. Result has 403 places, 522 transitions, 6410 flow [2024-06-21 16:30:12,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6211, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6410, PETRI_PLACES=403, PETRI_TRANSITIONS=522} [2024-06-21 16:30:12,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-21 16:30:12,687 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 522 transitions, 6410 flow [2024-06-21 16:30:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:12,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:12,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:12,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:30:12,687 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:30:12,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:12,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1862566220, now seen corresponding path program 1 times [2024-06-21 16:30:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741368813] [2024-06-21 16:30:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:12,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:12,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:13,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:13,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741368813] [2024-06-21 16:30:13,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741368813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:13,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:13,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:30:13,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067692958] [2024-06-21 16:30:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:13,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:30:13,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:30:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:30:13,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:30:13,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 522 transitions, 6410 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:13,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:13,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:30:13,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:16,908 INFO L124 PetriNetUnfolderBase]: 6744/10403 cut-off events. [2024-06-21 16:30:16,908 INFO L125 PetriNetUnfolderBase]: For 3002512/3002515 co-relation queries the response was YES. [2024-06-21 16:30:17,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101548 conditions, 10403 events. 6744/10403 cut-off events. For 3002512/3002515 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 64488 event pairs, 1340 based on Foata normal form. 4/10394 useless extension candidates. Maximal degree in co-relation 101353. Up to 9466 conditions per place. [2024-06-21 16:30:17,063 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 448 selfloop transitions, 91 changer transitions 0/578 dead transitions. [2024-06-21 16:30:17,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 578 transitions, 7875 flow [2024-06-21 16:30:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:30:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:30:17,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:30:17,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-21 16:30:17,064 INFO L175 Difference]: Start difference. First operand has 403 places, 522 transitions, 6410 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:30:17,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 578 transitions, 7875 flow [2024-06-21 16:30:25,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 578 transitions, 7706 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:30:25,647 INFO L231 Difference]: Finished difference. Result has 410 places, 538 transitions, 6745 flow [2024-06-21 16:30:25,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6241, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6745, PETRI_PLACES=410, PETRI_TRANSITIONS=538} [2024-06-21 16:30:25,648 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-21 16:30:25,648 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 538 transitions, 6745 flow [2024-06-21 16:30:25,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:25,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:25,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:25,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:30:25,648 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:30:25,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash 236709360, now seen corresponding path program 2 times [2024-06-21 16:30:25,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:25,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491521472] [2024-06-21 16:30:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:25,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:26,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:26,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491521472] [2024-06-21 16:30:26,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491521472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:26,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:26,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:26,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733570140] [2024-06-21 16:30:26,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:26,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:26,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:26,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:26,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:30:26,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 538 transitions, 6745 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:26,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:26,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:30:26,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:29,754 INFO L124 PetriNetUnfolderBase]: 6649/10287 cut-off events. [2024-06-21 16:30:29,754 INFO L125 PetriNetUnfolderBase]: For 3018201/3018204 co-relation queries the response was YES. [2024-06-21 16:30:29,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101821 conditions, 10287 events. 6649/10287 cut-off events. For 3018201/3018204 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 64101 event pairs, 1479 based on Foata normal form. 4/10253 useless extension candidates. Maximal degree in co-relation 101623. Up to 9728 conditions per place. [2024-06-21 16:30:29,921 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 479 selfloop transitions, 89 changer transitions 0/611 dead transitions. [2024-06-21 16:30:29,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 611 transitions, 9125 flow [2024-06-21 16:30:29,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:30:29,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-21 16:30:29,922 INFO L175 Difference]: Start difference. First operand has 410 places, 538 transitions, 6745 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:30:29,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 611 transitions, 9125 flow [2024-06-21 16:30:38,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 611 transitions, 8906 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-21 16:30:38,881 INFO L231 Difference]: Finished difference. Result has 419 places, 578 transitions, 7356 flow [2024-06-21 16:30:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6526, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7356, PETRI_PLACES=419, PETRI_TRANSITIONS=578} [2024-06-21 16:30:38,882 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-21 16:30:38,882 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 578 transitions, 7356 flow [2024-06-21 16:30:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:38,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:38,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:30:38,882 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:30:38,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 236696898, now seen corresponding path program 4 times [2024-06-21 16:30:38,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:38,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308923709] [2024-06-21 16:30:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:38,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:40,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:40,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308923709] [2024-06-21 16:30:40,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308923709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:40,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420494091] [2024-06-21 16:30:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:40,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:40,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:40,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:30:40,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 578 transitions, 7356 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:40,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:40,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:30:40,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:43,267 INFO L124 PetriNetUnfolderBase]: 6661/10307 cut-off events. [2024-06-21 16:30:43,267 INFO L125 PetriNetUnfolderBase]: For 3077716/3077719 co-relation queries the response was YES. [2024-06-21 16:30:43,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102126 conditions, 10307 events. 6661/10307 cut-off events. For 3077716/3077719 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 64231 event pairs, 1526 based on Foata normal form. 6/10275 useless extension candidates. Maximal degree in co-relation 101922. Up to 9874 conditions per place. [2024-06-21 16:30:43,431 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 497 selfloop transitions, 60 changer transitions 0/600 dead transitions. [2024-06-21 16:30:43,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 600 transitions, 8568 flow [2024-06-21 16:30:43,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:30:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-21 16:30:43,432 INFO L175 Difference]: Start difference. First operand has 419 places, 578 transitions, 7356 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:30:43,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 600 transitions, 8568 flow [2024-06-21 16:30:52,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 600 transitions, 8468 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 16:30:52,585 INFO L231 Difference]: Finished difference. Result has 426 places, 581 transitions, 7440 flow [2024-06-21 16:30:52,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7256, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7440, PETRI_PLACES=426, PETRI_TRANSITIONS=581} [2024-06-21 16:30:52,586 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-21 16:30:52,586 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 581 transitions, 7440 flow [2024-06-21 16:30:52,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:52,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:52,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:52,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:30:52,587 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:30:52,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:52,587 INFO L85 PathProgramCache]: Analyzing trace with hash 237112980, now seen corresponding path program 3 times [2024-06-21 16:30:52,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:52,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865192893] [2024-06-21 16:30:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:52,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:53,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:53,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865192893] [2024-06-21 16:30:53,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865192893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:53,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:53,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:30:53,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981523659] [2024-06-21 16:30:53,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:53,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:30:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:30:53,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:30:53,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:30:53,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 581 transitions, 7440 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:53,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:53,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:30:53,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:56,963 INFO L124 PetriNetUnfolderBase]: 6677/10328 cut-off events. [2024-06-21 16:30:56,963 INFO L125 PetriNetUnfolderBase]: For 3102079/3102082 co-relation queries the response was YES. [2024-06-21 16:30:57,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102541 conditions, 10328 events. 6677/10328 cut-off events. For 3102079/3102082 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 64332 event pairs, 1479 based on Foata normal form. 4/10294 useless extension candidates. Maximal degree in co-relation 102335. Up to 9768 conditions per place. [2024-06-21 16:30:57,142 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 487 selfloop transitions, 88 changer transitions 0/618 dead transitions. [2024-06-21 16:30:57,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 618 transitions, 9435 flow [2024-06-21 16:30:57,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:30:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:30:57,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:30:57,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-21 16:30:57,143 INFO L175 Difference]: Start difference. First operand has 426 places, 581 transitions, 7440 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:30:57,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 618 transitions, 9435 flow [2024-06-21 16:31:06,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 618 transitions, 9279 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:31:06,825 INFO L231 Difference]: Finished difference. Result has 428 places, 585 transitions, 7547 flow [2024-06-21 16:31:06,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7284, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7547, PETRI_PLACES=428, PETRI_TRANSITIONS=585} [2024-06-21 16:31:06,826 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 384 predicate places. [2024-06-21 16:31:06,826 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 585 transitions, 7547 flow [2024-06-21 16:31:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:06,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:06,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:06,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:31:06,826 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:06,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash 236697270, now seen corresponding path program 4 times [2024-06-21 16:31:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:06,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587624702] [2024-06-21 16:31:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:07,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587624702] [2024-06-21 16:31:07,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587624702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:07,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:31:07,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501948461] [2024-06-21 16:31:07,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:07,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:31:07,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:07,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:31:07,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:31:07,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-21 16:31:07,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 585 transitions, 7547 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:07,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:07,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-21 16:31:07,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:10,756 INFO L124 PetriNetUnfolderBase]: 6687/10342 cut-off events. [2024-06-21 16:31:10,757 INFO L125 PetriNetUnfolderBase]: For 3145478/3145481 co-relation queries the response was YES. [2024-06-21 16:31:10,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103096 conditions, 10342 events. 6687/10342 cut-off events. For 3145478/3145481 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 64488 event pairs, 1479 based on Foata normal form. 4/10308 useless extension candidates. Maximal degree in co-relation 102889. Up to 9764 conditions per place. [2024-06-21 16:31:10,924 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 479 selfloop transitions, 100 changer transitions 0/622 dead transitions. [2024-06-21 16:31:10,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 622 transitions, 9562 flow [2024-06-21 16:31:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:31:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:31:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:31:10,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-21 16:31:10,925 INFO L175 Difference]: Start difference. First operand has 428 places, 585 transitions, 7547 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:31:10,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 622 transitions, 9562 flow [2024-06-21 16:31:19,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 622 transitions, 9356 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:31:19,731 INFO L231 Difference]: Finished difference. Result has 431 places, 589 transitions, 7636 flow [2024-06-21 16:31:19,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7341, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7636, PETRI_PLACES=431, PETRI_TRANSITIONS=589} [2024-06-21 16:31:19,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-21 16:31:19,732 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 589 transitions, 7636 flow [2024-06-21 16:31:19,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:19,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:19,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:19,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:31:19,732 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:19,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:19,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1703037434, now seen corresponding path program 4 times [2024-06-21 16:31:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:19,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981176370] [2024-06-21 16:31:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:19,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:20,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:20,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981176370] [2024-06-21 16:31:20,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981176370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:20,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:20,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:20,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76851038] [2024-06-21 16:31:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:20,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:20,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:20,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:20,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:20,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:31:20,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 589 transitions, 7636 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:20,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:20,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:31:20,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:23,546 INFO L124 PetriNetUnfolderBase]: 6923/10607 cut-off events. [2024-06-21 16:31:23,546 INFO L125 PetriNetUnfolderBase]: For 3189058/3189058 co-relation queries the response was YES. [2024-06-21 16:31:23,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104944 conditions, 10607 events. 6923/10607 cut-off events. For 3189058/3189058 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 65055 event pairs, 1558 based on Foata normal form. 1/10606 useless extension candidates. Maximal degree in co-relation 104736. Up to 10539 conditions per place. [2024-06-21 16:31:23,719 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 578 selfloop transitions, 35 changer transitions 0/616 dead transitions. [2024-06-21 16:31:23,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 616 transitions, 9324 flow [2024-06-21 16:31:23,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:31:23,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-21 16:31:23,720 INFO L175 Difference]: Start difference. First operand has 431 places, 589 transitions, 7636 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:31:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 616 transitions, 9324 flow [2024-06-21 16:31:32,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 616 transitions, 9069 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 16:31:32,035 INFO L231 Difference]: Finished difference. Result has 433 places, 595 transitions, 7607 flow [2024-06-21 16:31:32,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7381, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7607, PETRI_PLACES=433, PETRI_TRANSITIONS=595} [2024-06-21 16:31:32,036 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-21 16:31:32,036 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 595 transitions, 7607 flow [2024-06-21 16:31:32,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:32,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:32,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:32,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:31:32,036 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:31:32,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1050934172, now seen corresponding path program 5 times [2024-06-21 16:31:32,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:32,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019356730] [2024-06-21 16:31:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:32,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:32,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019356730] [2024-06-21 16:31:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019356730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:32,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:32,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:31:32,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566453259] [2024-06-21 16:31:32,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:32,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:31:32,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:32,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:31:32,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:31:32,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-21 16:31:32,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 595 transitions, 7607 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:32,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:32,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-21 16:31:32,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:35,711 INFO L124 PetriNetUnfolderBase]: 6928/10614 cut-off events. [2024-06-21 16:31:35,712 INFO L125 PetriNetUnfolderBase]: For 3233805/3233805 co-relation queries the response was YES. [2024-06-21 16:31:35,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105174 conditions, 10614 events. 6928/10614 cut-off events. For 3233805/3233805 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 65124 event pairs, 1561 based on Foata normal form. 1/10613 useless extension candidates. Maximal degree in co-relation 104964. Up to 10563 conditions per place. [2024-06-21 16:31:35,884 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 582 selfloop transitions, 30 changer transitions 0/615 dead transitions. [2024-06-21 16:31:35,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 615 transitions, 8950 flow [2024-06-21 16:31:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:31:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:31:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:31:35,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-21 16:31:35,885 INFO L175 Difference]: Start difference. First operand has 433 places, 595 transitions, 7607 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:31:35,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 615 transitions, 8950 flow