./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 17:48:16,618 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:48:16,693 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:48:16,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:48:16,699 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:48:16,723 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:48:16,727 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:48:16,727 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:48:16,728 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:48:16,732 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:48:16,732 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:48:16,732 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:48:16,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:48:16,735 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:48:16,735 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:48:16,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:48:16,736 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:48:16,736 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:48:16,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:48:16,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:48:16,737 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:48:16,737 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:48:16,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:48:16,738 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:48:16,738 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:48:16,738 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:48:16,739 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:48:16,739 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:48:16,740 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:48:16,740 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:48:16,741 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:48:16,741 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:48:16,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:48:16,742 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:48:16,742 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:48:16,742 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:48:16,742 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:48:16,743 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:48:16,743 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:48:16,743 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:48:16,743 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:48:16,744 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:48:16,744 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:48:16,744 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:48:16,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:48:17,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:48:17,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:48:17,012 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:48:17,012 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:48:17,014 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i [2024-06-21 17:48:18,191 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:48:18,457 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:48:18,457 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i [2024-06-21 17:48:18,473 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19147b3d2/7cc2a2c4bdc847dd9e53ff82cadd1881/FLAG04d9cde39 [2024-06-21 17:48:18,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19147b3d2/7cc2a2c4bdc847dd9e53ff82cadd1881 [2024-06-21 17:48:18,489 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:48:18,490 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:48:18,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-21 17:48:18,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:48:18,712 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:48:18,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:48:18,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:48:18,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:48:18,717 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:48:18" (1/2) ... [2024-06-21 17:48:18,718 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e33600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:18, skipping insertion in model container [2024-06-21 17:48:18,719 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:48:18" (1/2) ... [2024-06-21 17:48:18,720 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@72f886e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:48:18, skipping insertion in model container [2024-06-21 17:48:18,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:48:18" (2/2) ... [2024-06-21 17:48:18,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e33600 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:18, skipping insertion in model container [2024-06-21 17:48:18,721 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:48:18" (2/2) ... [2024-06-21 17:48:18,722 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:48:18,819 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:48:18,820 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 17:48:18,820 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 17:48:18,821 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-21 17:48:18,821 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:48:18,821 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-21 17:48:18,872 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:48:19,264 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:48:19,274 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:48:19,375 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:48:19,412 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:48:19,412 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19 WrapperNode [2024-06-21 17:48:19,412 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:48:19,414 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:48:19,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:48:19,414 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:48:19,421 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,459 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,493 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-21 17:48:19,493 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:48:19,494 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:48:19,494 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:48:19,494 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:48:19,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,508 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,525 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:48:19,526 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,534 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:48:19,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:48:19,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:48:19,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:48:19,559 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (1/1) ... [2024-06-21 17:48:19,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:48:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:48:19,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 17:48:19,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 17:48:19,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:48:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:48:19,650 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:48:19,650 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:48:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:48:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:48:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:48:19,651 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:48:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:48:19,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:48:19,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:48:19,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:48:19,653 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:48:19,796 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:48:19,798 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:48:20,180 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:48:20,181 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:48:20,335 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:48:20,336 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:48:20,337 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:48:20 BoogieIcfgContainer [2024-06-21 17:48:20,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:48:20,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:48:20,341 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:48:20,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:48:20,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:48:18" (1/4) ... [2024-06-21 17:48:20,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0a665a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:48:20, skipping insertion in model container [2024-06-21 17:48:20,345 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:48:18" (2/4) ... [2024-06-21 17:48:20,346 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0a665a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:48:20, skipping insertion in model container [2024-06-21 17:48:20,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:48:19" (3/4) ... [2024-06-21 17:48:20,347 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a0a665a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:48:20, skipping insertion in model container [2024-06-21 17:48:20,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:48:20" (4/4) ... [2024-06-21 17:48:20,348 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.oepc_pso.oepc_rmo.oepc_rmo.opt.i [2024-06-21 17:48:20,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:48:20,364 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 17:48:20,365 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:48:20,445 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:48:20,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:48:20,514 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 17:48:20,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:48:20,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:48:20,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 17:48:20,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 17:48:20,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:48:20,542 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;@7ee6943b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:48:20,542 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 17:48:20,549 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:48:20,549 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:48:20,549 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:48:20,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:20,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:48:20,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:20,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 366539877, now seen corresponding path program 1 times [2024-06-21 17:48:20,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:20,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319394101] [2024-06-21 17:48:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:21,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:21,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319394101] [2024-06-21 17:48:21,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319394101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:21,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:21,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:48:21,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266778541] [2024-06-21 17:48:21,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:21,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:48:21,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:48:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:48:21,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:48:21,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:21,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:21,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:48:21,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:22,063 INFO L124 PetriNetUnfolderBase]: 1401/2110 cut-off events. [2024-06-21 17:48:22,064 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 17:48:22,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 2110 events. 1401/2110 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9668 event pairs, 989 based on Foata normal form. 3/2071 useless extension candidates. Maximal degree in co-relation 4294. Up to 2091 conditions per place. [2024-06-21 17:48:22,085 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 17:48:22,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 43 transitions, 177 flow [2024-06-21 17:48:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:48:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:48:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-21 17:48:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 17:48:22,098 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 74 transitions. [2024-06-21 17:48:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 43 transitions, 177 flow [2024-06-21 17:48:22,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:22,103 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 17:48:22,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 17:48:22,108 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 17:48:22,108 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 17:48:22,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:22,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:22,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:22,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:48:22,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:22,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:22,110 INFO L85 PathProgramCache]: Analyzing trace with hash 58400200, now seen corresponding path program 1 times [2024-06-21 17:48:22,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:22,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628808472] [2024-06-21 17:48:22,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:22,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628808472] [2024-06-21 17:48:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628808472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:22,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:48:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551590213] [2024-06-21 17:48:22,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:48:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:48:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:48:22,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:48:22,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:22,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:22,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:48:22,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:23,155 INFO L124 PetriNetUnfolderBase]: 1405/2115 cut-off events. [2024-06-21 17:48:23,155 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2024-06-21 17:48:23,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 2115 events. 1405/2115 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9737 event pairs, 780 based on Foata normal form. 5/2119 useless extension candidates. Maximal degree in co-relation 4875. Up to 2081 conditions per place. [2024-06-21 17:48:23,166 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 44 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-21 17:48:23,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 56 transitions, 262 flow [2024-06-21 17:48:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:48:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:48:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-21 17:48:23,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 17:48:23,169 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 95 transitions. [2024-06-21 17:48:23,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 56 transitions, 262 flow [2024-06-21 17:48:23,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:23,171 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 154 flow [2024-06-21 17:48:23,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-21 17:48:23,172 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 17:48:23,172 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 154 flow [2024-06-21 17:48:23,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:23,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:23,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:23,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:48:23,174 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:23,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:23,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1810407254, now seen corresponding path program 1 times [2024-06-21 17:48:23,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:23,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995161567] [2024-06-21 17:48:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:23,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:23,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:23,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995161567] [2024-06-21 17:48:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995161567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:23,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:48:23,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782940908] [2024-06-21 17:48:23,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:23,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:48:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:48:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:48:23,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:48:23,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:23,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:23,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:48:23,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:24,189 INFO L124 PetriNetUnfolderBase]: 1469/2207 cut-off events. [2024-06-21 17:48:24,190 INFO L125 PetriNetUnfolderBase]: For 1081/1084 co-relation queries the response was YES. [2024-06-21 17:48:24,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5795 conditions, 2207 events. 1469/2207 cut-off events. For 1081/1084 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10227 event pairs, 617 based on Foata normal form. 11/2214 useless extension candidates. Maximal degree in co-relation 5780. Up to 2053 conditions per place. [2024-06-21 17:48:24,208 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-21 17:48:24,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 434 flow [2024-06-21 17:48:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:48:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:48:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 17:48:24,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 17:48:24,210 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 154 flow. Second operand 5 states and 126 transitions. [2024-06-21 17:48:24,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 434 flow [2024-06-21 17:48:24,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 424 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:24,216 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 257 flow [2024-06-21 17:48:24,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-06-21 17:48:24,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-21 17:48:24,217 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 257 flow [2024-06-21 17:48:24,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:24,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:24,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:24,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:48:24,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:24,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash -543117789, now seen corresponding path program 1 times [2024-06-21 17:48:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:24,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765558567] [2024-06-21 17:48:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:25,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:25,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:25,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765558567] [2024-06-21 17:48:25,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765558567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:25,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:25,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:48:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764393114] [2024-06-21 17:48:25,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:25,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:48:25,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:48:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:48:25,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:48:25,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 257 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:25,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:25,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:48:25,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:25,654 INFO L124 PetriNetUnfolderBase]: 1477/2219 cut-off events. [2024-06-21 17:48:25,654 INFO L125 PetriNetUnfolderBase]: For 2926/2942 co-relation queries the response was YES. [2024-06-21 17:48:25,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6979 conditions, 2219 events. 1477/2219 cut-off events. For 2926/2942 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10060 event pairs, 556 based on Foata normal form. 11/2226 useless extension candidates. Maximal degree in co-relation 6960. Up to 2097 conditions per place. [2024-06-21 17:48:25,671 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-21 17:48:25,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 627 flow [2024-06-21 17:48:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:25,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 17:48:25,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 17:48:25,677 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 257 flow. Second operand 6 states and 144 transitions. [2024-06-21 17:48:25,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 627 flow [2024-06-21 17:48:25,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 615 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 17:48:25,687 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 408 flow [2024-06-21 17:48:25,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2024-06-21 17:48:25,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-21 17:48:25,689 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 408 flow [2024-06-21 17:48:25,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:25,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:25,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:25,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:48:25,690 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 343218841, now seen corresponding path program 1 times [2024-06-21 17:48:25,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:25,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720049413] [2024-06-21 17:48:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:26,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:26,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720049413] [2024-06-21 17:48:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720049413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:26,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855326229] [2024-06-21 17:48:26,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:26,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:26,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-21 17:48:26,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 408 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 17:48:26,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:26,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-21 17:48:26,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:27,283 INFO L124 PetriNetUnfolderBase]: 1617/2437 cut-off events. [2024-06-21 17:48:27,283 INFO L125 PetriNetUnfolderBase]: For 5182/5201 co-relation queries the response was YES. [2024-06-21 17:48:27,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8537 conditions, 2437 events. 1617/2437 cut-off events. For 5182/5201 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11350 event pairs, 434 based on Foata normal form. 44/2477 useless extension candidates. Maximal degree in co-relation 8513. Up to 2062 conditions per place. [2024-06-21 17:48:27,307 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 76 selfloop transitions, 34 changer transitions 0/115 dead transitions. [2024-06-21 17:48:27,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 115 transitions, 820 flow [2024-06-21 17:48:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:27,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 17:48:27,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 17:48:27,310 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 408 flow. Second operand 7 states and 174 transitions. [2024-06-21 17:48:27,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 115 transitions, 820 flow [2024-06-21 17:48:27,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 115 transitions, 794 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:27,321 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 525 flow [2024-06-21 17:48:27,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2024-06-21 17:48:27,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-21 17:48:27,324 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 525 flow [2024-06-21 17:48:27,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 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 17:48:27,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:27,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:27,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:48:27,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:27,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:27,329 INFO L85 PathProgramCache]: Analyzing trace with hash -212618023, now seen corresponding path program 1 times [2024-06-21 17:48:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:27,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618437025] [2024-06-21 17:48:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:27,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:27,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:27,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618437025] [2024-06-21 17:48:27,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618437025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:27,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:27,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:48:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651230683] [2024-06-21 17:48:27,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:27,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:48:27,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:48:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:48:27,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:48:27,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 525 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:27,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:27,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:48:27,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:28,481 INFO L124 PetriNetUnfolderBase]: 1606/2420 cut-off events. [2024-06-21 17:48:28,481 INFO L125 PetriNetUnfolderBase]: For 7987/7999 co-relation queries the response was YES. [2024-06-21 17:48:28,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9698 conditions, 2420 events. 1606/2420 cut-off events. For 7987/7999 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11244 event pairs, 582 based on Foata normal form. 10/2429 useless extension candidates. Maximal degree in co-relation 9670. Up to 2382 conditions per place. [2024-06-21 17:48:28,502 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 70 selfloop transitions, 12 changer transitions 0/86 dead transitions. [2024-06-21 17:48:28,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 745 flow [2024-06-21 17:48:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:48:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:48:28,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 17:48:28,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-21 17:48:28,504 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 525 flow. Second operand 5 states and 94 transitions. [2024-06-21 17:48:28,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 745 flow [2024-06-21 17:48:28,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 86 transitions, 692 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:28,514 INFO L231 Difference]: Finished difference. Result has 67 places, 73 transitions, 537 flow [2024-06-21 17:48:28,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=537, PETRI_PLACES=67, PETRI_TRANSITIONS=73} [2024-06-21 17:48:28,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-21 17:48:28,518 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 73 transitions, 537 flow [2024-06-21 17:48:28,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:28,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:28,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:28,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:48:28,518 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:28,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:28,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1998459449, now seen corresponding path program 1 times [2024-06-21 17:48:28,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:28,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802511244] [2024-06-21 17:48:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:28,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:29,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:29,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802511244] [2024-06-21 17:48:29,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802511244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:29,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:29,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:29,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342757119] [2024-06-21 17:48:29,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:29,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:29,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:29,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:29,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:29,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:29,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 73 transitions, 537 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 17:48:29,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:29,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:29,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:29,867 INFO L124 PetriNetUnfolderBase]: 1853/2775 cut-off events. [2024-06-21 17:48:29,867 INFO L125 PetriNetUnfolderBase]: For 10521/10521 co-relation queries the response was YES. [2024-06-21 17:48:29,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11371 conditions, 2775 events. 1853/2775 cut-off events. For 10521/10521 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 12980 event pairs, 695 based on Foata normal form. 4/2779 useless extension candidates. Maximal degree in co-relation 11340. Up to 2736 conditions per place. [2024-06-21 17:48:29,892 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 84 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2024-06-21 17:48:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 831 flow [2024-06-21 17:48:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:48:29,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:48:29,894 INFO L175 Difference]: Start difference. First operand has 67 places, 73 transitions, 537 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:48:29,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 831 flow [2024-06-21 17:48:29,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 795 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:29,906 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 617 flow [2024-06-21 17:48:29,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=617, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-21 17:48:29,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 17:48:29,908 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 617 flow [2024-06-21 17:48:29,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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 17:48:29,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:29,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:29,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:48:29,909 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:29,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:29,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1539923350, now seen corresponding path program 1 times [2024-06-21 17:48:29,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:29,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544814989] [2024-06-21 17:48:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:29,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:30,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:30,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:30,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544814989] [2024-06-21 17:48:30,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544814989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:30,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:30,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:30,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186270403] [2024-06-21 17:48:30,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:30,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:30,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:30,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:30,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:48:30,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 617 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:30,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:30,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:48:30,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:31,153 INFO L124 PetriNetUnfolderBase]: 1764/2654 cut-off events. [2024-06-21 17:48:31,154 INFO L125 PetriNetUnfolderBase]: For 12011/12032 co-relation queries the response was YES. [2024-06-21 17:48:31,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11566 conditions, 2654 events. 1764/2654 cut-off events. For 12011/12032 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12526 event pairs, 621 based on Foata normal form. 18/2657 useless extension candidates. Maximal degree in co-relation 11532. Up to 2476 conditions per place. [2024-06-21 17:48:31,169 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 74 selfloop transitions, 29 changer transitions 0/110 dead transitions. [2024-06-21 17:48:31,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 961 flow [2024-06-21 17:48:31,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:31,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:31,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 17:48:31,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-21 17:48:31,172 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 617 flow. Second operand 6 states and 119 transitions. [2024-06-21 17:48:31,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 961 flow [2024-06-21 17:48:31,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 110 transitions, 953 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:31,184 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 734 flow [2024-06-21 17:48:31,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=734, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-06-21 17:48:31,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-21 17:48:31,185 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 734 flow [2024-06-21 17:48:31,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:31,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:31,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:48:31,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:31,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1832639920, now seen corresponding path program 2 times [2024-06-21 17:48:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:31,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211574525] [2024-06-21 17:48:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:31,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:31,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211574525] [2024-06-21 17:48:31,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211574525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:31,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:31,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:48:31,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571634838] [2024-06-21 17:48:31,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:31,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:48:31,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:31,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:48:31,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:48:31,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:48:31,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 734 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:31,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:31,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:48:31,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:32,385 INFO L124 PetriNetUnfolderBase]: 1717/2578 cut-off events. [2024-06-21 17:48:32,385 INFO L125 PetriNetUnfolderBase]: For 13474/13495 co-relation queries the response was YES. [2024-06-21 17:48:32,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11534 conditions, 2578 events. 1717/2578 cut-off events. For 13474/13495 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 12063 event pairs, 618 based on Foata normal form. 4/2569 useless extension candidates. Maximal degree in co-relation 11497. Up to 2527 conditions per place. [2024-06-21 17:48:32,405 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 80 selfloop transitions, 17 changer transitions 0/104 dead transitions. [2024-06-21 17:48:32,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 973 flow [2024-06-21 17:48:32,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:48:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:48:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:48:32,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:48:32,407 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 734 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:48:32,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 973 flow [2024-06-21 17:48:32,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 933 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:32,432 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 739 flow [2024-06-21 17:48:32,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=739, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-21 17:48:32,433 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-21 17:48:32,433 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 739 flow [2024-06-21 17:48:32,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:32,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:32,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:48:32,434 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:32,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash -639672864, now seen corresponding path program 1 times [2024-06-21 17:48:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:32,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415136676] [2024-06-21 17:48:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:32,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:33,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:33,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415136676] [2024-06-21 17:48:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415136676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:33,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:33,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969085304] [2024-06-21 17:48:33,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:33,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:33,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:33,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:33,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:33,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:33,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 739 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:33,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:33,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:33,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:33,724 INFO L124 PetriNetUnfolderBase]: 1886/2817 cut-off events. [2024-06-21 17:48:33,724 INFO L125 PetriNetUnfolderBase]: For 16135/16135 co-relation queries the response was YES. [2024-06-21 17:48:33,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12499 conditions, 2817 events. 1886/2817 cut-off events. For 16135/16135 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13067 event pairs, 593 based on Foata normal form. 8/2825 useless extension candidates. Maximal degree in co-relation 12461. Up to 2601 conditions per place. [2024-06-21 17:48:33,745 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 109 selfloop transitions, 23 changer transitions 0/135 dead transitions. [2024-06-21 17:48:33,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 135 transitions, 1276 flow [2024-06-21 17:48:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:48:33,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:48:33,747 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 739 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:48:33,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 135 transitions, 1276 flow [2024-06-21 17:48:33,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 1177 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:33,766 INFO L231 Difference]: Finished difference. Result has 84 places, 104 transitions, 870 flow [2024-06-21 17:48:33,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=870, PETRI_PLACES=84, PETRI_TRANSITIONS=104} [2024-06-21 17:48:33,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-21 17:48:33,767 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 104 transitions, 870 flow [2024-06-21 17:48:33,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:33,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:33,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:33,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:48:33,767 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:33,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:33,768 INFO L85 PathProgramCache]: Analyzing trace with hash 973925602, now seen corresponding path program 2 times [2024-06-21 17:48:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:33,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766245365] [2024-06-21 17:48:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:34,401 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 17:48:34,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766245365] [2024-06-21 17:48:34,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766245365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:34,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:34,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:34,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389630054] [2024-06-21 17:48:34,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:34,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:34,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:34,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:34,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:34,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:34,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 104 transitions, 870 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:34,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:34,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:34,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:35,106 INFO L124 PetriNetUnfolderBase]: 1908/2847 cut-off events. [2024-06-21 17:48:35,106 INFO L125 PetriNetUnfolderBase]: For 18421/18421 co-relation queries the response was YES. [2024-06-21 17:48:35,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13648 conditions, 2847 events. 1908/2847 cut-off events. For 18421/18421 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13114 event pairs, 622 based on Foata normal form. 4/2851 useless extension candidates. Maximal degree in co-relation 13607. Up to 2799 conditions per place. [2024-06-21 17:48:35,128 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 110 selfloop transitions, 14 changer transitions 0/127 dead transitions. [2024-06-21 17:48:35,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 127 transitions, 1192 flow [2024-06-21 17:48:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:35,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:48:35,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:48:35,130 INFO L175 Difference]: Start difference. First operand has 84 places, 104 transitions, 870 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:48:35,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 127 transitions, 1192 flow [2024-06-21 17:48:35,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 127 transitions, 1174 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-21 17:48:35,152 INFO L231 Difference]: Finished difference. Result has 90 places, 107 transitions, 916 flow [2024-06-21 17:48:35,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=916, PETRI_PLACES=90, PETRI_TRANSITIONS=107} [2024-06-21 17:48:35,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-21 17:48:35,153 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 107 transitions, 916 flow [2024-06-21 17:48:35,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:35,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:35,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:35,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:48:35,154 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:35,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:35,155 INFO L85 PathProgramCache]: Analyzing trace with hash 668926522, now seen corresponding path program 3 times [2024-06-21 17:48:35,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:35,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959344676] [2024-06-21 17:48:35,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:35,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:35,924 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 17:48:35,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959344676] [2024-06-21 17:48:35,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959344676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:35,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:35,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:35,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913499973] [2024-06-21 17:48:35,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:35,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:35,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:35,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:35,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:36,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:36,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 107 transitions, 916 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:36,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:36,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:36,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:36,604 INFO L124 PetriNetUnfolderBase]: 1898/2833 cut-off events. [2024-06-21 17:48:36,604 INFO L125 PetriNetUnfolderBase]: For 20969/20969 co-relation queries the response was YES. [2024-06-21 17:48:36,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13920 conditions, 2833 events. 1898/2833 cut-off events. For 20969/20969 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13065 event pairs, 620 based on Foata normal form. 4/2837 useless extension candidates. Maximal degree in co-relation 13876. Up to 2758 conditions per place. [2024-06-21 17:48:36,623 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 112 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2024-06-21 17:48:36,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 134 transitions, 1288 flow [2024-06-21 17:48:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:36,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:48:36,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:48:36,625 INFO L175 Difference]: Start difference. First operand has 90 places, 107 transitions, 916 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:48:36,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 134 transitions, 1288 flow [2024-06-21 17:48:36,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 134 transitions, 1252 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:36,649 INFO L231 Difference]: Finished difference. Result has 93 places, 113 transitions, 998 flow [2024-06-21 17:48:36,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=998, PETRI_PLACES=93, PETRI_TRANSITIONS=113} [2024-06-21 17:48:36,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-21 17:48:36,650 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 113 transitions, 998 flow [2024-06-21 17:48:36,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:36,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:36,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:36,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:48:36,650 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:36,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:36,651 INFO L85 PathProgramCache]: Analyzing trace with hash 670361892, now seen corresponding path program 1 times [2024-06-21 17:48:36,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:36,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403277562] [2024-06-21 17:48:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:36,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:37,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:37,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403277562] [2024-06-21 17:48:37,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403277562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:37,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:37,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:37,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340008618] [2024-06-21 17:48:37,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:38,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:38,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 113 transitions, 998 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:38,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:38,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:38,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:38,648 INFO L124 PetriNetUnfolderBase]: 1890/2821 cut-off events. [2024-06-21 17:48:38,648 INFO L125 PetriNetUnfolderBase]: For 23588/23588 co-relation queries the response was YES. [2024-06-21 17:48:38,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14223 conditions, 2821 events. 1890/2821 cut-off events. For 23588/23588 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13043 event pairs, 601 based on Foata normal form. 4/2825 useless extension candidates. Maximal degree in co-relation 14178. Up to 2764 conditions per place. [2024-06-21 17:48:38,667 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 15 changer transitions 0/135 dead transitions. [2024-06-21 17:48:38,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 1328 flow [2024-06-21 17:48:38,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:38,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-21 17:48:38,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-21 17:48:38,669 INFO L175 Difference]: Start difference. First operand has 93 places, 113 transitions, 998 flow. Second operand 7 states and 117 transitions. [2024-06-21 17:48:38,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 1328 flow [2024-06-21 17:48:38,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1302 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:38,696 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 1029 flow [2024-06-21 17:48:38,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1029, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-21 17:48:38,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-21 17:48:38,697 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 1029 flow [2024-06-21 17:48:38,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:38,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:38,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:38,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:48:38,698 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:38,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:38,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1901170571, now seen corresponding path program 1 times [2024-06-21 17:48:38,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:38,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402225862] [2024-06-21 17:48:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:39,531 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 17:48:39,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:39,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402225862] [2024-06-21 17:48:39,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402225862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:39,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:39,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:39,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719471601] [2024-06-21 17:48:39,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:39,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:39,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:48:39,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 1029 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:39,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:39,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:48:39,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:40,265 INFO L124 PetriNetUnfolderBase]: 1837/2757 cut-off events. [2024-06-21 17:48:40,265 INFO L125 PetriNetUnfolderBase]: For 28412/28487 co-relation queries the response was YES. [2024-06-21 17:48:40,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14480 conditions, 2757 events. 1837/2757 cut-off events. For 28412/28487 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12985 event pairs, 538 based on Foata normal form. 33/2729 useless extension candidates. Maximal degree in co-relation 14433. Up to 2454 conditions per place. [2024-06-21 17:48:40,291 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 90 selfloop transitions, 48 changer transitions 0/153 dead transitions. [2024-06-21 17:48:40,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 153 transitions, 1430 flow [2024-06-21 17:48:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 17:48:40,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-21 17:48:40,293 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 1029 flow. Second operand 8 states and 157 transitions. [2024-06-21 17:48:40,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 153 transitions, 1430 flow [2024-06-21 17:48:40,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 153 transitions, 1391 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:40,322 INFO L231 Difference]: Finished difference. Result has 100 places, 119 transitions, 1145 flow [2024-06-21 17:48:40,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1145, PETRI_PLACES=100, PETRI_TRANSITIONS=119} [2024-06-21 17:48:40,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-21 17:48:40,323 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 119 transitions, 1145 flow [2024-06-21 17:48:40,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:40,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:40,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:40,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:48:40,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:40,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1897355556, now seen corresponding path program 1 times [2024-06-21 17:48:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:40,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651462449] [2024-06-21 17:48:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:40,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:41,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:41,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651462449] [2024-06-21 17:48:41,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651462449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:41,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:41,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:41,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928235796] [2024-06-21 17:48:41,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:41,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:41,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:41,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:41,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:41,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:41,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 119 transitions, 1145 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:41,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:41,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:41,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:41,556 INFO L124 PetriNetUnfolderBase]: 1946/2904 cut-off events. [2024-06-21 17:48:41,556 INFO L125 PetriNetUnfolderBase]: For 30152/30154 co-relation queries the response was YES. [2024-06-21 17:48:41,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15744 conditions, 2904 events. 1946/2904 cut-off events. For 30152/30154 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13439 event pairs, 579 based on Foata normal form. 6/2910 useless extension candidates. Maximal degree in co-relation 15696. Up to 2643 conditions per place. [2024-06-21 17:48:41,577 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 119 selfloop transitions, 34 changer transitions 0/156 dead transitions. [2024-06-21 17:48:41,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 156 transitions, 1719 flow [2024-06-21 17:48:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 17:48:41,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 17:48:41,579 INFO L175 Difference]: Start difference. First operand has 100 places, 119 transitions, 1145 flow. Second operand 7 states and 132 transitions. [2024-06-21 17:48:41,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 156 transitions, 1719 flow [2024-06-21 17:48:41,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1600 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:41,614 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1185 flow [2024-06-21 17:48:41,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1185, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2024-06-21 17:48:41,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2024-06-21 17:48:41,615 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1185 flow [2024-06-21 17:48:41,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:41,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:41,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:41,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:48:41,616 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:41,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:41,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1897361136, now seen corresponding path program 2 times [2024-06-21 17:48:41,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:41,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998382506] [2024-06-21 17:48:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:41,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:42,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:42,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998382506] [2024-06-21 17:48:42,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998382506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:42,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:42,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:42,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109951565] [2024-06-21 17:48:42,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:42,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:42,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:42,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:42,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:42,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:42,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1185 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:42,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:42,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:42,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:42,865 INFO L124 PetriNetUnfolderBase]: 1936/2890 cut-off events. [2024-06-21 17:48:42,866 INFO L125 PetriNetUnfolderBase]: For 32912/32914 co-relation queries the response was YES. [2024-06-21 17:48:42,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15859 conditions, 2890 events. 1936/2890 cut-off events. For 32912/32914 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13400 event pairs, 570 based on Foata normal form. 6/2896 useless extension candidates. Maximal degree in co-relation 15809. Up to 2635 conditions per place. [2024-06-21 17:48:42,891 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 117 selfloop transitions, 38 changer transitions 0/158 dead transitions. [2024-06-21 17:48:42,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 158 transitions, 1660 flow [2024-06-21 17:48:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 17:48:42,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-21 17:48:42,893 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1185 flow. Second operand 7 states and 134 transitions. [2024-06-21 17:48:42,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 158 transitions, 1660 flow [2024-06-21 17:48:42,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 158 transitions, 1604 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 17:48:42,997 INFO L231 Difference]: Finished difference. Result has 107 places, 128 transitions, 1259 flow [2024-06-21 17:48:42,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1259, PETRI_PLACES=107, PETRI_TRANSITIONS=128} [2024-06-21 17:48:42,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-21 17:48:42,999 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 128 transitions, 1259 flow [2024-06-21 17:48:42,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:42,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:42,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:42,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:48:42,999 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:43,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:43,000 INFO L85 PathProgramCache]: Analyzing trace with hash 126930761, now seen corresponding path program 1 times [2024-06-21 17:48:43,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:43,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216031864] [2024-06-21 17:48:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:43,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:44,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:44,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216031864] [2024-06-21 17:48:44,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216031864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:44,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:44,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:44,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90027163] [2024-06-21 17:48:44,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:44,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:44,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:44,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:44,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:44,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:44,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 128 transitions, 1259 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:44,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:44,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:44,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:44,757 INFO L124 PetriNetUnfolderBase]: 1931/2881 cut-off events. [2024-06-21 17:48:44,757 INFO L125 PetriNetUnfolderBase]: For 36098/36098 co-relation queries the response was YES. [2024-06-21 17:48:44,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16152 conditions, 2881 events. 1931/2881 cut-off events. For 36098/36098 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13315 event pairs, 597 based on Foata normal form. 2/2883 useless extension candidates. Maximal degree in co-relation 16100. Up to 2815 conditions per place. [2024-06-21 17:48:44,774 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 19 changer transitions 0/151 dead transitions. [2024-06-21 17:48:44,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 151 transitions, 1633 flow [2024-06-21 17:48:44,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 17:48:44,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-21 17:48:44,776 INFO L175 Difference]: Start difference. First operand has 107 places, 128 transitions, 1259 flow. Second operand 7 states and 118 transitions. [2024-06-21 17:48:44,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 151 transitions, 1633 flow [2024-06-21 17:48:44,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1578 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:48:44,812 INFO L231 Difference]: Finished difference. Result has 110 places, 131 transitions, 1286 flow [2024-06-21 17:48:44,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1286, PETRI_PLACES=110, PETRI_TRANSITIONS=131} [2024-06-21 17:48:44,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-21 17:48:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 131 transitions, 1286 flow [2024-06-21 17:48:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:44,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:44,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:48:44,813 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:44,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash -730762134, now seen corresponding path program 3 times [2024-06-21 17:48:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911220282] [2024-06-21 17:48:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:45,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911220282] [2024-06-21 17:48:45,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911220282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:45,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:45,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:48:45,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87528330] [2024-06-21 17:48:45,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:45,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:48:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:48:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:48:45,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:45,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 1286 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:45,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:45,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:45,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:46,030 INFO L124 PetriNetUnfolderBase]: 1921/2868 cut-off events. [2024-06-21 17:48:46,030 INFO L125 PetriNetUnfolderBase]: For 39430/39432 co-relation queries the response was YES. [2024-06-21 17:48:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16430 conditions, 2868 events. 1921/2868 cut-off events. For 39430/39432 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13298 event pairs, 599 based on Foata normal form. 6/2874 useless extension candidates. Maximal degree in co-relation 16377. Up to 2796 conditions per place. [2024-06-21 17:48:46,048 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 134 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-21 17:48:46,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 153 transitions, 1652 flow [2024-06-21 17:48:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:48:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:48:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 17:48:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:48:46,050 INFO L175 Difference]: Start difference. First operand has 110 places, 131 transitions, 1286 flow. Second operand 7 states and 119 transitions. [2024-06-21 17:48:46,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 153 transitions, 1652 flow [2024-06-21 17:48:46,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 153 transitions, 1598 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:46,094 INFO L231 Difference]: Finished difference. Result has 112 places, 132 transitions, 1284 flow [2024-06-21 17:48:46,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1284, PETRI_PLACES=112, PETRI_TRANSITIONS=132} [2024-06-21 17:48:46,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 17:48:46,095 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 132 transitions, 1284 flow [2024-06-21 17:48:46,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:46,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:46,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:48:46,096 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:46,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1193194569, now seen corresponding path program 1 times [2024-06-21 17:48:46,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:46,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673339774] [2024-06-21 17:48:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:46,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:46,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673339774] [2024-06-21 17:48:46,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673339774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:46,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:46,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774735754] [2024-06-21 17:48:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:46,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:46,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:46,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:47,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:48:47,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 132 transitions, 1284 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:47,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:47,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:48:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:47,695 INFO L124 PetriNetUnfolderBase]: 2096/3152 cut-off events. [2024-06-21 17:48:47,695 INFO L125 PetriNetUnfolderBase]: For 54413/54502 co-relation queries the response was YES. [2024-06-21 17:48:47,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18646 conditions, 3152 events. 2096/3152 cut-off events. For 54413/54502 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15316 event pairs, 441 based on Foata normal form. 40/3134 useless extension candidates. Maximal degree in co-relation 18592. Up to 2354 conditions per place. [2024-06-21 17:48:47,721 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 116 selfloop transitions, 48 changer transitions 0/184 dead transitions. [2024-06-21 17:48:47,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 184 transitions, 1924 flow [2024-06-21 17:48:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 17:48:47,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-21 17:48:47,724 INFO L175 Difference]: Start difference. First operand has 112 places, 132 transitions, 1284 flow. Second operand 8 states and 167 transitions. [2024-06-21 17:48:47,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 184 transitions, 1924 flow [2024-06-21 17:48:47,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 1894 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:47,775 INFO L231 Difference]: Finished difference. Result has 116 places, 138 transitions, 1457 flow [2024-06-21 17:48:47,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1254, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1457, PETRI_PLACES=116, PETRI_TRANSITIONS=138} [2024-06-21 17:48:47,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 17:48:47,776 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 138 transitions, 1457 flow [2024-06-21 17:48:47,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:47,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:47,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:47,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:48:47,777 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:47,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1193255019, now seen corresponding path program 2 times [2024-06-21 17:48:47,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:47,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969586226] [2024-06-21 17:48:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:47,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:48,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:48,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969586226] [2024-06-21 17:48:48,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969586226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:48,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:48,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:48,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973437221] [2024-06-21 17:48:48,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:48,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-21 17:48:48,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 138 transitions, 1457 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:48,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:48,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-21 17:48:48,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:49,464 INFO L124 PetriNetUnfolderBase]: 2110/3176 cut-off events. [2024-06-21 17:48:49,464 INFO L125 PetriNetUnfolderBase]: For 61906/61987 co-relation queries the response was YES. [2024-06-21 17:48:49,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19734 conditions, 3176 events. 2110/3176 cut-off events. For 61906/61987 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15492 event pairs, 600 based on Foata normal form. 51/3171 useless extension candidates. Maximal degree in co-relation 19678. Up to 2784 conditions per place. [2024-06-21 17:48:49,485 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 112 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-21 17:48:49,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 184 transitions, 1947 flow [2024-06-21 17:48:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:48:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:48:49,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 17:48:49,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-06-21 17:48:49,487 INFO L175 Difference]: Start difference. First operand has 116 places, 138 transitions, 1457 flow. Second operand 9 states and 179 transitions. [2024-06-21 17:48:49,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 184 transitions, 1947 flow [2024-06-21 17:48:49,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 184 transitions, 1851 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:49,534 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1511 flow [2024-06-21 17:48:49,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1362, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1511, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-06-21 17:48:49,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-21 17:48:49,535 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1511 flow [2024-06-21 17:48:49,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:49,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:49,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:49,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:48:49,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:49,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:49,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1193255143, now seen corresponding path program 1 times [2024-06-21 17:48:49,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:49,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784079899] [2024-06-21 17:48:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:49,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:50,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:50,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784079899] [2024-06-21 17:48:50,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784079899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:50,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:50,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:50,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443847440] [2024-06-21 17:48:50,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:50,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:50,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:50,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:50,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:50,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:50,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1511 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:48:50,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:50,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:50,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:51,237 INFO L124 PetriNetUnfolderBase]: 2206/3305 cut-off events. [2024-06-21 17:48:51,238 INFO L125 PetriNetUnfolderBase]: For 59322/59324 co-relation queries the response was YES. [2024-06-21 17:48:51,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20432 conditions, 3305 events. 2206/3305 cut-off events. For 59322/59324 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15964 event pairs, 610 based on Foata normal form. 6/3311 useless extension candidates. Maximal degree in co-relation 20375. Up to 2936 conditions per place. [2024-06-21 17:48:51,256 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 145 selfloop transitions, 47 changer transitions 0/195 dead transitions. [2024-06-21 17:48:51,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 195 transitions, 2202 flow [2024-06-21 17:48:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:48:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:48:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 17:48:51,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455 [2024-06-21 17:48:51,258 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1511 flow. Second operand 10 states and 182 transitions. [2024-06-21 17:48:51,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 195 transitions, 2202 flow [2024-06-21 17:48:51,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 2081 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:48:51,310 INFO L231 Difference]: Finished difference. Result has 125 places, 151 transitions, 1624 flow [2024-06-21 17:48:51,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1624, PETRI_PLACES=125, PETRI_TRANSITIONS=151} [2024-06-21 17:48:51,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-21 17:48:51,311 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 151 transitions, 1624 flow [2024-06-21 17:48:51,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:48:51,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:51,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:51,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:48:51,311 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:51,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:51,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1311342823, now seen corresponding path program 2 times [2024-06-21 17:48:51,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:51,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393590721] [2024-06-21 17:48:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:51,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:52,137 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 17:48:52,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:52,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393590721] [2024-06-21 17:48:52,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393590721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:52,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:52,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:52,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723585311] [2024-06-21 17:48:52,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:52,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:52,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:52,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:52,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:52,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 151 transitions, 1624 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:48:52,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:52,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:52,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:52,868 INFO L124 PetriNetUnfolderBase]: 2228/3337 cut-off events. [2024-06-21 17:48:52,868 INFO L125 PetriNetUnfolderBase]: For 64782/64784 co-relation queries the response was YES. [2024-06-21 17:48:52,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21186 conditions, 3337 events. 2228/3337 cut-off events. For 64782/64784 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16106 event pairs, 618 based on Foata normal form. 6/3343 useless extension candidates. Maximal degree in co-relation 21126. Up to 2997 conditions per place. [2024-06-21 17:48:52,890 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 147 selfloop transitions, 48 changer transitions 0/198 dead transitions. [2024-06-21 17:48:52,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 198 transitions, 2259 flow [2024-06-21 17:48:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:48:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:48:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 17:48:52,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:48:52,892 INFO L175 Difference]: Start difference. First operand has 125 places, 151 transitions, 1624 flow. Second operand 9 states and 171 transitions. [2024-06-21 17:48:52,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 198 transitions, 2259 flow [2024-06-21 17:48:52,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 198 transitions, 2174 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 17:48:52,956 INFO L231 Difference]: Finished difference. Result has 130 places, 155 transitions, 1698 flow [2024-06-21 17:48:52,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1698, PETRI_PLACES=130, PETRI_TRANSITIONS=155} [2024-06-21 17:48:52,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-21 17:48:52,957 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 155 transitions, 1698 flow [2024-06-21 17:48:52,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:48:52,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:52,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:52,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:48:52,958 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:52,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1311520453, now seen corresponding path program 3 times [2024-06-21 17:48:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147955537] [2024-06-21 17:48:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:53,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:53,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147955537] [2024-06-21 17:48:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147955537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:53,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:53,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:48:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875684724] [2024-06-21 17:48:53,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:53,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:48:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:48:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:48:53,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:53,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 155 transitions, 1698 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:48:53,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:53,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:53,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:54,455 INFO L124 PetriNetUnfolderBase]: 2250/3369 cut-off events. [2024-06-21 17:48:54,455 INFO L125 PetriNetUnfolderBase]: For 69735/69737 co-relation queries the response was YES. [2024-06-21 17:48:54,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21812 conditions, 3369 events. 2250/3369 cut-off events. For 69735/69737 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16237 event pairs, 623 based on Foata normal form. 6/3375 useless extension candidates. Maximal degree in co-relation 21749. Up to 3097 conditions per place. [2024-06-21 17:48:54,481 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 146 selfloop transitions, 39 changer transitions 0/188 dead transitions. [2024-06-21 17:48:54,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 188 transitions, 2188 flow [2024-06-21 17:48:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:48:54,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:48:54,483 INFO L175 Difference]: Start difference. First operand has 130 places, 155 transitions, 1698 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:48:54,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 188 transitions, 2188 flow [2024-06-21 17:48:54,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 188 transitions, 2074 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 17:48:54,551 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1714 flow [2024-06-21 17:48:54,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1714, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2024-06-21 17:48:54,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-21 17:48:54,552 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1714 flow [2024-06-21 17:48:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:48:54,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:54,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:54,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:48:54,553 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:54,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:54,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1311527397, now seen corresponding path program 1 times [2024-06-21 17:48:54,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:54,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824904756] [2024-06-21 17:48:54,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:54,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:55,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:55,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824904756] [2024-06-21 17:48:55,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824904756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:55,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:55,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:48:55,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100142339] [2024-06-21 17:48:55,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:55,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:48:55,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:55,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:48:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:48:55,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:55,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1714 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:55,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:55,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:55,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:56,207 INFO L124 PetriNetUnfolderBase]: 2284/3423 cut-off events. [2024-06-21 17:48:56,207 INFO L125 PetriNetUnfolderBase]: For 76462/76464 co-relation queries the response was YES. [2024-06-21 17:48:56,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22205 conditions, 3423 events. 2284/3423 cut-off events. For 76462/76464 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16615 event pairs, 615 based on Foata normal form. 10/3433 useless extension candidates. Maximal degree in co-relation 22141. Up to 3138 conditions per place. [2024-06-21 17:48:56,231 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 148 selfloop transitions, 39 changer transitions 0/190 dead transitions. [2024-06-21 17:48:56,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 2200 flow [2024-06-21 17:48:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:48:56,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:48:56,233 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1714 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:48:56,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 2200 flow [2024-06-21 17:48:56,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 190 transitions, 2112 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:56,364 INFO L231 Difference]: Finished difference. Result has 133 places, 161 transitions, 1754 flow [2024-06-21 17:48:56,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1754, PETRI_PLACES=133, PETRI_TRANSITIONS=161} [2024-06-21 17:48:56,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 17:48:56,364 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 161 transitions, 1754 flow [2024-06-21 17:48:56,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:56,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:56,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:48:56,365 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:56,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1441227159, now seen corresponding path program 2 times [2024-06-21 17:48:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:56,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859404384] [2024-06-21 17:48:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:56,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:57,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:57,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859404384] [2024-06-21 17:48:57,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859404384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:57,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:57,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:48:57,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409592097] [2024-06-21 17:48:57,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:57,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:48:57,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:57,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:48:57,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:48:57,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:57,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 161 transitions, 1754 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:57,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:57,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:57,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:48:58,186 INFO L124 PetriNetUnfolderBase]: 2301/3448 cut-off events. [2024-06-21 17:48:58,187 INFO L125 PetriNetUnfolderBase]: For 81632/81632 co-relation queries the response was YES. [2024-06-21 17:48:58,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22899 conditions, 3448 events. 2301/3448 cut-off events. For 81632/81632 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16710 event pairs, 653 based on Foata normal form. 4/3452 useless extension candidates. Maximal degree in co-relation 22834. Up to 3359 conditions per place. [2024-06-21 17:48:58,212 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-06-21 17:48:58,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 188 transitions, 2222 flow [2024-06-21 17:48:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:48:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:48:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:48:58,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:48:58,214 INFO L175 Difference]: Start difference. First operand has 133 places, 161 transitions, 1754 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:48:58,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 188 transitions, 2222 flow [2024-06-21 17:48:58,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 188 transitions, 2118 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:48:58,295 INFO L231 Difference]: Finished difference. Result has 135 places, 163 transitions, 1738 flow [2024-06-21 17:48:58,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1738, PETRI_PLACES=135, PETRI_TRANSITIONS=163} [2024-06-21 17:48:58,296 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-21 17:48:58,296 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 163 transitions, 1738 flow [2024-06-21 17:48:58,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:58,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:48:58,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:48:58,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:48:58,297 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:48:58,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:48:58,297 INFO L85 PathProgramCache]: Analyzing trace with hash -416504471, now seen corresponding path program 3 times [2024-06-21 17:48:58,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:48:58,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155900844] [2024-06-21 17:48:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:48:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:48:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:48:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:48:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:48:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155900844] [2024-06-21 17:48:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155900844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:48:59,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:48:59,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:48:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011550236] [2024-06-21 17:48:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:48:59,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:48:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:48:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:48:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:48:59,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:48:59,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 163 transitions, 1738 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:48:59,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:48:59,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:48:59,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:00,037 INFO L124 PetriNetUnfolderBase]: 2318/3475 cut-off events. [2024-06-21 17:49:00,037 INFO L125 PetriNetUnfolderBase]: For 87747/87747 co-relation queries the response was YES. [2024-06-21 17:49:00,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23230 conditions, 3475 events. 2318/3475 cut-off events. For 87747/87747 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16839 event pairs, 658 based on Foata normal form. 4/3479 useless extension candidates. Maximal degree in co-relation 23164. Up to 3382 conditions per place. [2024-06-21 17:49:00,066 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 167 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-21 17:49:00,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 191 transitions, 2220 flow [2024-06-21 17:49:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:49:00,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:49:00,067 INFO L175 Difference]: Start difference. First operand has 135 places, 163 transitions, 1738 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:49:00,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 191 transitions, 2220 flow [2024-06-21 17:49:00,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 2152 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:00,156 INFO L231 Difference]: Finished difference. Result has 137 places, 165 transitions, 1761 flow [2024-06-21 17:49:00,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=137, PETRI_TRANSITIONS=165} [2024-06-21 17:49:00,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 17:49:00,157 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 165 transitions, 1761 flow [2024-06-21 17:49:00,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:00,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:00,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:00,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:49:00,157 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:00,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1178789129, now seen corresponding path program 4 times [2024-06-21 17:49:00,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:00,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994453246] [2024-06-21 17:49:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:00,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:00,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994453246] [2024-06-21 17:49:00,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994453246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:00,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:00,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028956966] [2024-06-21 17:49:00,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:00,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:00,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:00,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:01,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:01,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 165 transitions, 1761 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:49:01,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:01,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:01,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:01,579 INFO L124 PetriNetUnfolderBase]: 2306/3460 cut-off events. [2024-06-21 17:49:01,580 INFO L125 PetriNetUnfolderBase]: For 92795/92797 co-relation queries the response was YES. [2024-06-21 17:49:01,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23298 conditions, 3460 events. 2306/3460 cut-off events. For 92795/92797 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16856 event pairs, 644 based on Foata normal form. 8/3468 useless extension candidates. Maximal degree in co-relation 23231. Up to 3325 conditions per place. [2024-06-21 17:49:01,603 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 167 selfloop transitions, 30 changer transitions 0/200 dead transitions. [2024-06-21 17:49:01,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 200 transitions, 2421 flow [2024-06-21 17:49:01,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 17:49:01,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-21 17:49:01,605 INFO L175 Difference]: Start difference. First operand has 137 places, 165 transitions, 1761 flow. Second operand 8 states and 138 transitions. [2024-06-21 17:49:01,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 200 transitions, 2421 flow [2024-06-21 17:49:01,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 200 transitions, 2334 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:01,700 INFO L231 Difference]: Finished difference. Result has 140 places, 172 transitions, 1850 flow [2024-06-21 17:49:01,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1678, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1850, PETRI_PLACES=140, PETRI_TRANSITIONS=172} [2024-06-21 17:49:01,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 17:49:01,701 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 172 transitions, 1850 flow [2024-06-21 17:49:01,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:49:01,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:01,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:01,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:49:01,701 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:01,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:01,702 INFO L85 PathProgramCache]: Analyzing trace with hash -351772703, now seen corresponding path program 4 times [2024-06-21 17:49:01,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:01,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725395109] [2024-06-21 17:49:01,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:01,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:02,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:02,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725395109] [2024-06-21 17:49:02,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725395109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:02,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:02,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399877747] [2024-06-21 17:49:02,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:02,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:02,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:02,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:02,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 172 transitions, 1850 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:02,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:02,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:02,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:03,288 INFO L124 PetriNetUnfolderBase]: 2298/3447 cut-off events. [2024-06-21 17:49:03,289 INFO L125 PetriNetUnfolderBase]: For 97054/97054 co-relation queries the response was YES. [2024-06-21 17:49:03,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23698 conditions, 3447 events. 2298/3447 cut-off events. For 97054/97054 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16720 event pairs, 628 based on Foata normal form. 4/3451 useless extension candidates. Maximal degree in co-relation 23629. Up to 3367 conditions per place. [2024-06-21 17:49:03,314 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 179 selfloop transitions, 17 changer transitions 0/199 dead transitions. [2024-06-21 17:49:03,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 199 transitions, 2348 flow [2024-06-21 17:49:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 17:49:03,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-21 17:49:03,315 INFO L175 Difference]: Start difference. First operand has 140 places, 172 transitions, 1850 flow. Second operand 8 states and 132 transitions. [2024-06-21 17:49:03,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 199 transitions, 2348 flow [2024-06-21 17:49:03,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 199 transitions, 2272 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:03,403 INFO L231 Difference]: Finished difference. Result has 143 places, 174 transitions, 1863 flow [2024-06-21 17:49:03,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1863, PETRI_PLACES=143, PETRI_TRANSITIONS=174} [2024-06-21 17:49:03,404 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-21 17:49:03,404 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 174 transitions, 1863 flow [2024-06-21 17:49:03,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:03,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:03,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:03,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:49:03,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:03,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash -27598611, now seen corresponding path program 1 times [2024-06-21 17:49:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179558632] [2024-06-21 17:49:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:04,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:04,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179558632] [2024-06-21 17:49:04,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179558632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:04,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:04,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:04,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898345201] [2024-06-21 17:49:04,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:04,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:04,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:04,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:04,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:04,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 174 transitions, 1863 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:49:04,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:04,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:04,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:04,967 INFO L124 PetriNetUnfolderBase]: 2290/3436 cut-off events. [2024-06-21 17:49:04,967 INFO L125 PetriNetUnfolderBase]: For 101880/101882 co-relation queries the response was YES. [2024-06-21 17:49:04,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23802 conditions, 3436 events. 2290/3436 cut-off events. For 101880/101882 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16740 event pairs, 642 based on Foata normal form. 4/3440 useless extension candidates. Maximal degree in co-relation 23732. Up to 3337 conditions per place. [2024-06-21 17:49:04,993 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 24 changer transitions 0/195 dead transitions. [2024-06-21 17:49:04,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 195 transitions, 2303 flow [2024-06-21 17:49:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:04,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:49:04,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:49:04,995 INFO L175 Difference]: Start difference. First operand has 143 places, 174 transitions, 1863 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:49:04,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 195 transitions, 2303 flow [2024-06-21 17:49:05,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 195 transitions, 2218 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:05,090 INFO L231 Difference]: Finished difference. Result has 144 places, 174 transitions, 1838 flow [2024-06-21 17:49:05,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1838, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2024-06-21 17:49:05,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 17:49:05,091 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1838 flow [2024-06-21 17:49:05,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 17:49:05,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:05,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:05,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:49:05,092 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:05,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:05,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1665673325, now seen corresponding path program 1 times [2024-06-21 17:49:05,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:05,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415256933] [2024-06-21 17:49:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:05,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:05,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415256933] [2024-06-21 17:49:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415256933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:05,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:05,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:05,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954985602] [2024-06-21 17:49:05,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:05,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:05,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:05,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:05,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:06,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:06,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1838 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:06,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:06,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:06,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:06,668 INFO L124 PetriNetUnfolderBase]: 2476/3743 cut-off events. [2024-06-21 17:49:06,669 INFO L125 PetriNetUnfolderBase]: For 122780/122782 co-relation queries the response was YES. [2024-06-21 17:49:06,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25841 conditions, 3743 events. 2476/3743 cut-off events. For 122780/122782 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18649 event pairs, 458 based on Foata normal form. 18/3761 useless extension candidates. Maximal degree in co-relation 25770. Up to 2782 conditions per place. [2024-06-21 17:49:06,701 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 173 selfloop transitions, 55 changer transitions 0/231 dead transitions. [2024-06-21 17:49:06,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 231 transitions, 2695 flow [2024-06-21 17:49:06,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:49:06,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-21 17:49:06,703 INFO L175 Difference]: Start difference. First operand has 144 places, 174 transitions, 1838 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:49:06,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 231 transitions, 2695 flow [2024-06-21 17:49:06,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 231 transitions, 2647 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:06,825 INFO L231 Difference]: Finished difference. Result has 149 places, 180 transitions, 2030 flow [2024-06-21 17:49:06,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2030, PETRI_PLACES=149, PETRI_TRANSITIONS=180} [2024-06-21 17:49:06,826 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-21 17:49:06,826 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 180 transitions, 2030 flow [2024-06-21 17:49:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:06,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:06,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:06,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:49:06,826 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:06,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:06,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1580682485, now seen corresponding path program 2 times [2024-06-21 17:49:06,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:06,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866497467] [2024-06-21 17:49:06,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:06,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:07,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:07,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866497467] [2024-06-21 17:49:07,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866497467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:07,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:07,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:07,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073407375] [2024-06-21 17:49:07,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:07,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:07,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:07,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 180 transitions, 2030 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:07,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:07,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:08,562 INFO L124 PetriNetUnfolderBase]: 2645/4022 cut-off events. [2024-06-21 17:49:08,562 INFO L125 PetriNetUnfolderBase]: For 142639/142641 co-relation queries the response was YES. [2024-06-21 17:49:08,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28467 conditions, 4022 events. 2645/4022 cut-off events. For 142639/142641 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20699 event pairs, 660 based on Foata normal form. 18/4040 useless extension candidates. Maximal degree in co-relation 28393. Up to 3311 conditions per place. [2024-06-21 17:49:08,596 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 175 selfloop transitions, 57 changer transitions 0/235 dead transitions. [2024-06-21 17:49:08,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 235 transitions, 2843 flow [2024-06-21 17:49:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:49:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:49:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 17:49:08,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775 [2024-06-21 17:49:08,598 INFO L175 Difference]: Start difference. First operand has 149 places, 180 transitions, 2030 flow. Second operand 10 states and 191 transitions. [2024-06-21 17:49:08,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 235 transitions, 2843 flow [2024-06-21 17:49:08,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 235 transitions, 2750 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:08,740 INFO L231 Difference]: Finished difference. Result has 156 places, 183 transitions, 2130 flow [2024-06-21 17:49:08,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1937, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2130, PETRI_PLACES=156, PETRI_TRANSITIONS=183} [2024-06-21 17:49:08,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 17:49:08,741 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 183 transitions, 2130 flow [2024-06-21 17:49:08,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:08,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:08,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:08,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:49:08,741 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:08,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash 904855039, now seen corresponding path program 3 times [2024-06-21 17:49:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:08,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406561349] [2024-06-21 17:49:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:08,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:09,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:09,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406561349] [2024-06-21 17:49:09,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406561349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:09,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:09,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:09,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119729687] [2024-06-21 17:49:09,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:09,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:09,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:09,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:09,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:09,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:09,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 183 transitions, 2130 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:09,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:09,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:09,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:10,562 INFO L124 PetriNetUnfolderBase]: 2609/3966 cut-off events. [2024-06-21 17:49:10,563 INFO L125 PetriNetUnfolderBase]: For 144226/144228 co-relation queries the response was YES. [2024-06-21 17:49:10,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28094 conditions, 3966 events. 2609/3966 cut-off events. For 144226/144228 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20304 event pairs, 664 based on Foata normal form. 22/3988 useless extension candidates. Maximal degree in co-relation 28017. Up to 3411 conditions per place. [2024-06-21 17:49:10,615 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 174 selfloop transitions, 57 changer transitions 0/234 dead transitions. [2024-06-21 17:49:10,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 234 transitions, 2770 flow [2024-06-21 17:49:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:49:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:49:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 17:49:10,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 17:49:10,617 INFO L175 Difference]: Start difference. First operand has 156 places, 183 transitions, 2130 flow. Second operand 11 states and 200 transitions. [2024-06-21 17:49:10,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 234 transitions, 2770 flow [2024-06-21 17:49:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 234 transitions, 2671 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:10,798 INFO L231 Difference]: Finished difference. Result has 161 places, 184 transitions, 2183 flow [2024-06-21 17:49:10,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2183, PETRI_PLACES=161, PETRI_TRANSITIONS=184} [2024-06-21 17:49:10,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-21 17:49:10,799 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 184 transitions, 2183 flow [2024-06-21 17:49:10,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:10,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:10,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:10,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:49:10,800 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:10,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:10,800 INFO L85 PathProgramCache]: Analyzing trace with hash 270602103, now seen corresponding path program 4 times [2024-06-21 17:49:10,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:10,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760091609] [2024-06-21 17:49:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:10,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:11,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760091609] [2024-06-21 17:49:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760091609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:11,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:11,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:11,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245743737] [2024-06-21 17:49:11,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:11,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:11,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:11,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:11,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 184 transitions, 2183 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:11,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:11,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:11,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:12,485 INFO L124 PetriNetUnfolderBase]: 2789/4270 cut-off events. [2024-06-21 17:49:12,485 INFO L125 PetriNetUnfolderBase]: For 162745/162747 co-relation queries the response was YES. [2024-06-21 17:49:12,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30619 conditions, 4270 events. 2789/4270 cut-off events. For 162745/162747 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 22452 event pairs, 622 based on Foata normal form. 16/4286 useless extension candidates. Maximal degree in co-relation 30540. Up to 3423 conditions per place. [2024-06-21 17:49:12,522 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 169 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-21 17:49:12,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 238 transitions, 3027 flow [2024-06-21 17:49:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:49:12,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-21 17:49:12,524 INFO L175 Difference]: Start difference. First operand has 161 places, 184 transitions, 2183 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:49:12,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 238 transitions, 3027 flow [2024-06-21 17:49:12,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 238 transitions, 2919 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 17:49:12,711 INFO L231 Difference]: Finished difference. Result has 162 places, 188 transitions, 2316 flow [2024-06-21 17:49:12,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2316, PETRI_PLACES=162, PETRI_TRANSITIONS=188} [2024-06-21 17:49:12,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 121 predicate places. [2024-06-21 17:49:12,711 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 188 transitions, 2316 flow [2024-06-21 17:49:12,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:12,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:12,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:12,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:49:12,712 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:12,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1996922425, now seen corresponding path program 5 times [2024-06-21 17:49:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:12,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067416437] [2024-06-21 17:49:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:13,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:13,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067416437] [2024-06-21 17:49:13,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067416437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:13,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:13,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:13,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611682368] [2024-06-21 17:49:13,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:13,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:13,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:13,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:13,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:13,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 188 transitions, 2316 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:13,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:13,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:13,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:14,569 INFO L124 PetriNetUnfolderBase]: 2886/4427 cut-off events. [2024-06-21 17:49:14,570 INFO L125 PetriNetUnfolderBase]: For 176341/176343 co-relation queries the response was YES. [2024-06-21 17:49:14,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32009 conditions, 4427 events. 2886/4427 cut-off events. For 176341/176343 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23623 event pairs, 767 based on Foata normal form. 20/4447 useless extension candidates. Maximal degree in co-relation 31928. Up to 3911 conditions per place. [2024-06-21 17:49:14,605 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 168 selfloop transitions, 66 changer transitions 0/237 dead transitions. [2024-06-21 17:49:14,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 237 transitions, 2986 flow [2024-06-21 17:49:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 17:49:14,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-21 17:49:14,607 INFO L175 Difference]: Start difference. First operand has 162 places, 188 transitions, 2316 flow. Second operand 9 states and 172 transitions. [2024-06-21 17:49:14,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 237 transitions, 2986 flow [2024-06-21 17:49:14,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 2886 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:14,832 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 2419 flow [2024-06-21 17:49:14,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2419, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-21 17:49:14,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 17:49:14,833 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 2419 flow [2024-06-21 17:49:14,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:14,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:14,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:14,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:49:14,833 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:14,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash 2002636717, now seen corresponding path program 1 times [2024-06-21 17:49:14,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:14,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748419897] [2024-06-21 17:49:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:14,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:15,692 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 17:49:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:15,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748419897] [2024-06-21 17:49:15,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748419897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:15,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:15,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:15,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823748023] [2024-06-21 17:49:15,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:15,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:15,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:15,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:15,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 2419 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:15,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:15,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:15,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:16,640 INFO L124 PetriNetUnfolderBase]: 2903/4454 cut-off events. [2024-06-21 17:49:16,640 INFO L125 PetriNetUnfolderBase]: For 175771/175773 co-relation queries the response was YES. [2024-06-21 17:49:16,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32559 conditions, 4454 events. 2903/4454 cut-off events. For 175771/175773 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23786 event pairs, 774 based on Foata normal form. 6/4460 useless extension candidates. Maximal degree in co-relation 32476. Up to 4187 conditions per place. [2024-06-21 17:49:16,676 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 183 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-21 17:49:16,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 224 transitions, 2978 flow [2024-06-21 17:49:16,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:16,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:49:16,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:49:16,678 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 2419 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:49:16,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 224 transitions, 2978 flow [2024-06-21 17:49:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 224 transitions, 2864 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:16,878 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2429 flow [2024-06-21 17:49:16,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2429, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2024-06-21 17:49:16,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-21 17:49:16,879 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2429 flow [2024-06-21 17:49:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:49:16,879 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:16,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:16,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2002428955, now seen corresponding path program 6 times [2024-06-21 17:49:16,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125702978] [2024-06-21 17:49:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:17,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:17,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125702978] [2024-06-21 17:49:17,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125702978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:17,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:17,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:17,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439298221] [2024-06-21 17:49:17,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:17,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:17,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:17,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:17,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:17,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2429 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:18,756 INFO L124 PetriNetUnfolderBase]: 2978/4579 cut-off events. [2024-06-21 17:49:18,756 INFO L125 PetriNetUnfolderBase]: For 195280/195282 co-relation queries the response was YES. [2024-06-21 17:49:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33455 conditions, 4579 events. 2978/4579 cut-off events. For 195280/195282 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24665 event pairs, 793 based on Foata normal form. 20/4599 useless extension candidates. Maximal degree in co-relation 33371. Up to 4160 conditions per place. [2024-06-21 17:49:18,797 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 184 selfloop transitions, 47 changer transitions 0/234 dead transitions. [2024-06-21 17:49:18,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 234 transitions, 3043 flow [2024-06-21 17:49:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:49:18,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 17:49:18,799 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2429 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:49:18,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 234 transitions, 3043 flow [2024-06-21 17:49:19,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 234 transitions, 2940 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:19,046 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 2457 flow [2024-06-21 17:49:19,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2457, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2024-06-21 17:49:19,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-21 17:49:19,046 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 2457 flow [2024-06-21 17:49:19,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:19,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:19,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:19,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:49:19,047 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:19,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2002644157, now seen corresponding path program 2 times [2024-06-21 17:49:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:19,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756662049] [2024-06-21 17:49:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:19,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:19,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:19,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756662049] [2024-06-21 17:49:19,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756662049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:19,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:19,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291561284] [2024-06-21 17:49:19,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:19,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:19,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:20,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:20,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 2457 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:20,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:20,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:20,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:20,829 INFO L124 PetriNetUnfolderBase]: 3020/4645 cut-off events. [2024-06-21 17:49:20,829 INFO L125 PetriNetUnfolderBase]: For 198609/198611 co-relation queries the response was YES. [2024-06-21 17:49:20,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34284 conditions, 4645 events. 3020/4645 cut-off events. For 198609/198611 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25136 event pairs, 777 based on Foata normal form. 6/4651 useless extension candidates. Maximal degree in co-relation 34199. Up to 4267 conditions per place. [2024-06-21 17:49:20,875 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 183 selfloop transitions, 45 changer transitions 0/231 dead transitions. [2024-06-21 17:49:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 231 transitions, 3223 flow [2024-06-21 17:49:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 17:49:20,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-21 17:49:20,877 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 2457 flow. Second operand 8 states and 145 transitions. [2024-06-21 17:49:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 231 transitions, 3223 flow [2024-06-21 17:49:21,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 231 transitions, 3120 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:21,212 INFO L231 Difference]: Finished difference. Result has 173 places, 199 transitions, 2538 flow [2024-06-21 17:49:21,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2538, PETRI_PLACES=173, PETRI_TRANSITIONS=199} [2024-06-21 17:49:21,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-21 17:49:21,212 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 199 transitions, 2538 flow [2024-06-21 17:49:21,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:21,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:21,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:21,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:49:21,213 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:21,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1997072527, now seen corresponding path program 3 times [2024-06-21 17:49:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:21,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414566115] [2024-06-21 17:49:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414566115] [2024-06-21 17:49:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414566115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:22,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922219948] [2024-06-21 17:49:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:22,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:22,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:22,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:22,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 199 transitions, 2538 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:22,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:22,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:22,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:22,976 INFO L124 PetriNetUnfolderBase]: 3012/4633 cut-off events. [2024-06-21 17:49:22,976 INFO L125 PetriNetUnfolderBase]: For 204677/204679 co-relation queries the response was YES. [2024-06-21 17:49:23,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34393 conditions, 4633 events. 3012/4633 cut-off events. For 204677/204679 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25091 event pairs, 779 based on Foata normal form. 6/4639 useless extension candidates. Maximal degree in co-relation 34307. Up to 4366 conditions per place. [2024-06-21 17:49:23,016 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 41 changer transitions 0/232 dead transitions. [2024-06-21 17:49:23,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 232 transitions, 3084 flow [2024-06-21 17:49:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:23,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:49:23,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 17:49:23,017 INFO L175 Difference]: Start difference. First operand has 173 places, 199 transitions, 2538 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:49:23,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 232 transitions, 3084 flow [2024-06-21 17:49:23,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 232 transitions, 2987 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:23,256 INFO L231 Difference]: Finished difference. Result has 177 places, 199 transitions, 2530 flow [2024-06-21 17:49:23,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2441, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=177, PETRI_TRANSITIONS=199} [2024-06-21 17:49:23,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-21 17:49:23,257 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 199 transitions, 2530 flow [2024-06-21 17:49:23,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:23,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:23,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:23,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 17:49:23,257 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:23,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:23,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1997066575, now seen corresponding path program 7 times [2024-06-21 17:49:23,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:23,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084981856] [2024-06-21 17:49:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:23,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:24,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:24,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084981856] [2024-06-21 17:49:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084981856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:24,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:24,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:24,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131379803] [2024-06-21 17:49:24,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:24,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:24,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:24,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:24,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:24,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:24,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 199 transitions, 2530 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:24,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:24,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:24,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:25,132 INFO L124 PetriNetUnfolderBase]: 3087/4758 cut-off events. [2024-06-21 17:49:25,133 INFO L125 PetriNetUnfolderBase]: For 226736/226738 co-relation queries the response was YES. [2024-06-21 17:49:25,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35377 conditions, 4758 events. 3087/4758 cut-off events. For 226736/226738 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25973 event pairs, 798 based on Foata normal form. 20/4778 useless extension candidates. Maximal degree in co-relation 35289. Up to 4339 conditions per place. [2024-06-21 17:49:25,177 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 188 selfloop transitions, 51 changer transitions 0/242 dead transitions. [2024-06-21 17:49:25,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 242 transitions, 3170 flow [2024-06-21 17:49:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 17:49:25,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4638888888888889 [2024-06-21 17:49:25,178 INFO L175 Difference]: Start difference. First operand has 177 places, 199 transitions, 2530 flow. Second operand 9 states and 167 transitions. [2024-06-21 17:49:25,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 242 transitions, 3170 flow [2024-06-21 17:49:25,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 242 transitions, 3066 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:25,465 INFO L231 Difference]: Finished difference. Result has 179 places, 200 transitions, 2567 flow [2024-06-21 17:49:25,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2567, PETRI_PLACES=179, PETRI_TRANSITIONS=200} [2024-06-21 17:49:25,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 17:49:25,466 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 200 transitions, 2567 flow [2024-06-21 17:49:25,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:25,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:25,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 17:49:25,467 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:25,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1979948609, now seen corresponding path program 4 times [2024-06-21 17:49:25,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:25,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358717754] [2024-06-21 17:49:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:26,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:26,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358717754] [2024-06-21 17:49:26,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358717754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:26,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:26,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:26,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125397140] [2024-06-21 17:49:26,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:26,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:26,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:26,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:26,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:26,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:26,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 200 transitions, 2567 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:26,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:26,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:26,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:27,231 INFO L124 PetriNetUnfolderBase]: 3104/4784 cut-off events. [2024-06-21 17:49:27,231 INFO L125 PetriNetUnfolderBase]: For 225695/225697 co-relation queries the response was YES. [2024-06-21 17:49:27,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35849 conditions, 4784 events. 3104/4784 cut-off events. For 225695/225697 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26143 event pairs, 829 based on Foata normal form. 6/4790 useless extension candidates. Maximal degree in co-relation 35760. Up to 4680 conditions per place. [2024-06-21 17:49:27,274 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 18 changer transitions 0/228 dead transitions. [2024-06-21 17:49:27,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 228 transitions, 3119 flow [2024-06-21 17:49:27,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:49:27,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:49:27,275 INFO L175 Difference]: Start difference. First operand has 179 places, 200 transitions, 2567 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:49:27,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 228 transitions, 3119 flow [2024-06-21 17:49:27,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 228 transitions, 2981 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 17:49:27,581 INFO L231 Difference]: Finished difference. Result has 179 places, 202 transitions, 2514 flow [2024-06-21 17:49:27,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2514, PETRI_PLACES=179, PETRI_TRANSITIONS=202} [2024-06-21 17:49:27,582 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-21 17:49:27,582 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 202 transitions, 2514 flow [2024-06-21 17:49:27,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:27,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:27,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:27,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 17:49:27,582 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 17:49:27,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 985634373, now seen corresponding path program 5 times [2024-06-21 17:49:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:27,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566266822] [2024-06-21 17:49:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:27,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:28,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:28,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566266822] [2024-06-21 17:49:28,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566266822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:28,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:28,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471789481] [2024-06-21 17:49:28,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:28,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:28,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:28,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 202 transitions, 2514 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:28,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:28,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:28,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:29,294 INFO L124 PetriNetUnfolderBase]: 3121/4811 cut-off events. [2024-06-21 17:49:29,294 INFO L125 PetriNetUnfolderBase]: For 234956/234958 co-relation queries the response was YES. [2024-06-21 17:49:29,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36085 conditions, 4811 events. 3121/4811 cut-off events. For 234956/234958 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26410 event pairs, 870 based on Foata normal form. 6/4817 useless extension candidates. Maximal degree in co-relation 35995. Up to 4721 conditions per place. [2024-06-21 17:49:29,337 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 209 selfloop transitions, 18 changer transitions 0/230 dead transitions. [2024-06-21 17:49:29,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 230 transitions, 3083 flow [2024-06-21 17:49:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:29,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:49:29,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:49:29,338 INFO L175 Difference]: Start difference. First operand has 179 places, 202 transitions, 2514 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:49:29,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 230 transitions, 3083 flow [2024-06-21 17:49:29,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 230 transitions, 3016 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:29,647 INFO L231 Difference]: Finished difference. Result has 181 places, 204 transitions, 2541 flow [2024-06-21 17:49:29,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2541, PETRI_PLACES=181, PETRI_TRANSITIONS=204} [2024-06-21 17:49:29,648 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-21 17:49:29,648 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 204 transitions, 2541 flow [2024-06-21 17:49:29,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:29,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:29,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:29,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 17:49:29,649 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:29,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1714036127, now seen corresponding path program 8 times [2024-06-21 17:49:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:29,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744773799] [2024-06-21 17:49:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:30,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:30,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744773799] [2024-06-21 17:49:30,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744773799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:30,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:30,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:30,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097190979] [2024-06-21 17:49:30,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:30,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:30,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:30,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:30,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:30,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:30,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 204 transitions, 2541 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:30,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:30,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:30,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:31,425 INFO L124 PetriNetUnfolderBase]: 3057/4711 cut-off events. [2024-06-21 17:49:31,425 INFO L125 PetriNetUnfolderBase]: For 242540/242542 co-relation queries the response was YES. [2024-06-21 17:49:31,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34393 conditions, 4711 events. 3057/4711 cut-off events. For 242540/242542 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25704 event pairs, 822 based on Foata normal form. 38/4749 useless extension candidates. Maximal degree in co-relation 34302. Up to 4368 conditions per place. [2024-06-21 17:49:31,465 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 205 selfloop transitions, 32 changer transitions 0/240 dead transitions. [2024-06-21 17:49:31,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 240 transitions, 3159 flow [2024-06-21 17:49:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 17:49:31,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-21 17:49:31,466 INFO L175 Difference]: Start difference. First operand has 181 places, 204 transitions, 2541 flow. Second operand 9 states and 154 transitions. [2024-06-21 17:49:31,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 240 transitions, 3159 flow [2024-06-21 17:49:31,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 240 transitions, 3052 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:31,808 INFO L231 Difference]: Finished difference. Result has 184 places, 205 transitions, 2542 flow [2024-06-21 17:49:31,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2542, PETRI_PLACES=184, PETRI_TRANSITIONS=205} [2024-06-21 17:49:31,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-21 17:49:31,809 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 205 transitions, 2542 flow [2024-06-21 17:49:31,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:31,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:31,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:31,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 17:49:31,811 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:31,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1714251329, now seen corresponding path program 6 times [2024-06-21 17:49:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:31,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854696108] [2024-06-21 17:49:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:32,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:32,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854696108] [2024-06-21 17:49:32,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854696108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:32,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421340532] [2024-06-21 17:49:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:32,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:32,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 205 transitions, 2542 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:32,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:32,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:32,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:33,594 INFO L124 PetriNetUnfolderBase]: 3049/4699 cut-off events. [2024-06-21 17:49:33,594 INFO L125 PetriNetUnfolderBase]: For 218344/218346 co-relation queries the response was YES. [2024-06-21 17:49:33,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34123 conditions, 4699 events. 3049/4699 cut-off events. For 218344/218346 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25661 event pairs, 834 based on Foata normal form. 6/4705 useless extension candidates. Maximal degree in co-relation 34031. Up to 4568 conditions per place. [2024-06-21 17:49:33,637 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 210 selfloop transitions, 21 changer transitions 0/234 dead transitions. [2024-06-21 17:49:33,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 234 transitions, 3125 flow [2024-06-21 17:49:33,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:49:33,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:49:33,639 INFO L175 Difference]: Start difference. First operand has 184 places, 205 transitions, 2542 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:49:33,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 234 transitions, 3125 flow [2024-06-21 17:49:33,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 234 transitions, 3061 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:33,976 INFO L231 Difference]: Finished difference. Result has 186 places, 208 transitions, 2594 flow [2024-06-21 17:49:33,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2478, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2594, PETRI_PLACES=186, PETRI_TRANSITIONS=208} [2024-06-21 17:49:33,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-21 17:49:33,977 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 208 transitions, 2594 flow [2024-06-21 17:49:33,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:33,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:33,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:33,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 17:49:33,978 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:33,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:33,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1970744399, now seen corresponding path program 7 times [2024-06-21 17:49:33,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:33,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548796129] [2024-06-21 17:49:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:33,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:34,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:34,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548796129] [2024-06-21 17:49:34,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548796129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:34,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:34,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:34,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222898071] [2024-06-21 17:49:34,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:34,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:34,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:35,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:35,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 208 transitions, 2594 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:35,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:35,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:35,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:35,860 INFO L124 PetriNetUnfolderBase]: 3066/4726 cut-off events. [2024-06-21 17:49:35,860 INFO L125 PetriNetUnfolderBase]: For 228914/228916 co-relation queries the response was YES. [2024-06-21 17:49:35,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34630 conditions, 4726 events. 3066/4726 cut-off events. For 228914/228916 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25862 event pairs, 835 based on Foata normal form. 6/4732 useless extension candidates. Maximal degree in co-relation 34536. Up to 4591 conditions per place. [2024-06-21 17:49:35,905 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 205 selfloop transitions, 28 changer transitions 0/236 dead transitions. [2024-06-21 17:49:35,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 236 transitions, 3174 flow [2024-06-21 17:49:35,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:35,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:49:35,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:49:35,907 INFO L175 Difference]: Start difference. First operand has 186 places, 208 transitions, 2594 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:49:35,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 236 transitions, 3174 flow [2024-06-21 17:49:36,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 236 transitions, 3097 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:36,250 INFO L231 Difference]: Finished difference. Result has 189 places, 210 transitions, 2633 flow [2024-06-21 17:49:36,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2633, PETRI_PLACES=189, PETRI_TRANSITIONS=210} [2024-06-21 17:49:36,250 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-21 17:49:36,250 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 210 transitions, 2633 flow [2024-06-21 17:49:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:36,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:36,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:36,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 17:49:36,251 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:36,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1970751839, now seen corresponding path program 8 times [2024-06-21 17:49:36,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:36,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091896416] [2024-06-21 17:49:36,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:36,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:37,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:37,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091896416] [2024-06-21 17:49:37,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091896416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:37,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:37,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:49:37,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157233040] [2024-06-21 17:49:37,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:37,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:49:37,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:49:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:49:37,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:37,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 210 transitions, 2633 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:37,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:37,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:37,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:38,103 INFO L124 PetriNetUnfolderBase]: 3058/4714 cut-off events. [2024-06-21 17:49:38,103 INFO L125 PetriNetUnfolderBase]: For 234560/234562 co-relation queries the response was YES. [2024-06-21 17:49:38,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34666 conditions, 4714 events. 3058/4714 cut-off events. For 234560/234562 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25771 event pairs, 820 based on Foata normal form. 6/4720 useless extension candidates. Maximal degree in co-relation 34571. Up to 4497 conditions per place. [2024-06-21 17:49:38,149 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 201 selfloop transitions, 34 changer transitions 0/238 dead transitions. [2024-06-21 17:49:38,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 238 transitions, 3219 flow [2024-06-21 17:49:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:49:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:49:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:49:38,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:49:38,151 INFO L175 Difference]: Start difference. First operand has 189 places, 210 transitions, 2633 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:49:38,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 238 transitions, 3219 flow [2024-06-21 17:49:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 238 transitions, 3131 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:38,495 INFO L231 Difference]: Finished difference. Result has 191 places, 212 transitions, 2677 flow [2024-06-21 17:49:38,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2677, PETRI_PLACES=191, PETRI_TRANSITIONS=212} [2024-06-21 17:49:38,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 17:49:38,496 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 212 transitions, 2677 flow [2024-06-21 17:49:38,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:38,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:38,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:38,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 17:49:38,496 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:38,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:38,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1214273820, now seen corresponding path program 1 times [2024-06-21 17:49:38,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:38,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355502516] [2024-06-21 17:49:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:38,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:39,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:39,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355502516] [2024-06-21 17:49:39,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355502516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:39,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:39,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:39,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682462865] [2024-06-21 17:49:39,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:39,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:39,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:39,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:39,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 212 transitions, 2677 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 17:49:39,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:39,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:39,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:39,927 INFO L124 PetriNetUnfolderBase]: 3052/4705 cut-off events. [2024-06-21 17:49:39,927 INFO L125 PetriNetUnfolderBase]: For 239122/239122 co-relation queries the response was YES. [2024-06-21 17:49:39,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34811 conditions, 4705 events. 3052/4705 cut-off events. For 239122/239122 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25656 event pairs, 819 based on Foata normal form. 2/4707 useless extension candidates. Maximal degree in co-relation 34715. Up to 4650 conditions per place. [2024-06-21 17:49:39,971 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 211 selfloop transitions, 18 changer transitions 0/232 dead transitions. [2024-06-21 17:49:39,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 232 transitions, 3233 flow [2024-06-21 17:49:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:49:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:49:39,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2024-06-21 17:49:39,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-21 17:49:39,972 INFO L175 Difference]: Start difference. First operand has 191 places, 212 transitions, 2677 flow. Second operand 5 states and 94 transitions. [2024-06-21 17:49:39,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 232 transitions, 3233 flow [2024-06-21 17:49:40,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 232 transitions, 3129 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 17:49:40,354 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2683 flow [2024-06-21 17:49:40,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2683, PETRI_PLACES=190, PETRI_TRANSITIONS=215} [2024-06-21 17:49:40,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-21 17:49:40,354 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2683 flow [2024-06-21 17:49:40,354 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 17:49:40,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:40,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 17:49:40,355 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:40,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -884607084, now seen corresponding path program 1 times [2024-06-21 17:49:40,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:40,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137536566] [2024-06-21 17:49:40,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:40,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:41,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:41,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137536566] [2024-06-21 17:49:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137536566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:41,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:41,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338717168] [2024-06-21 17:49:41,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:41,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:41,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:41,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 215 transitions, 2683 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 17:49:41,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:41,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:41,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:42,085 INFO L124 PetriNetUnfolderBase]: 3082/4747 cut-off events. [2024-06-21 17:49:42,085 INFO L125 PetriNetUnfolderBase]: For 254140/254140 co-relation queries the response was YES. [2024-06-21 17:49:42,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35310 conditions, 4747 events. 3082/4747 cut-off events. For 254140/254140 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25913 event pairs, 814 based on Foata normal form. 6/4753 useless extension candidates. Maximal degree in co-relation 35213. Up to 4621 conditions per place. [2024-06-21 17:49:42,129 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 27 changer transitions 0/246 dead transitions. [2024-06-21 17:49:42,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 246 transitions, 3425 flow [2024-06-21 17:49:42,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:42,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 17:49:42,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:49:42,130 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2683 flow. Second operand 7 states and 126 transitions. [2024-06-21 17:49:42,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 246 transitions, 3425 flow [2024-06-21 17:49:42,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 246 transitions, 3367 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:42,425 INFO L231 Difference]: Finished difference. Result has 194 places, 221 transitions, 2772 flow [2024-06-21 17:49:42,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2625, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2772, PETRI_PLACES=194, PETRI_TRANSITIONS=221} [2024-06-21 17:49:42,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 153 predicate places. [2024-06-21 17:49:42,426 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 221 transitions, 2772 flow [2024-06-21 17:49:42,426 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 17:49:42,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:42,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:42,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 17:49:42,427 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:42,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1899947968, now seen corresponding path program 2 times [2024-06-21 17:49:42,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:42,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210652878] [2024-06-21 17:49:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:43,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210652878] [2024-06-21 17:49:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210652878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:43,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:43,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:43,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479962803] [2024-06-21 17:49:43,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:43,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:43,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:43,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:43,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:43,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 221 transitions, 2772 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 17:49:43,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:43,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:43,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:44,106 INFO L124 PetriNetUnfolderBase]: 3127/4810 cut-off events. [2024-06-21 17:49:44,106 INFO L125 PetriNetUnfolderBase]: For 264413/264413 co-relation queries the response was YES. [2024-06-21 17:49:44,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36236 conditions, 4810 events. 3127/4810 cut-off events. For 264413/264413 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26242 event pairs, 818 based on Foata normal form. 6/4816 useless extension candidates. Maximal degree in co-relation 36138. Up to 4732 conditions per place. [2024-06-21 17:49:44,149 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 221 selfloop transitions, 25 changer transitions 0/249 dead transitions. [2024-06-21 17:49:44,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 3427 flow [2024-06-21 17:49:44,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:49:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:49:44,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 17:49:44,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 17:49:44,150 INFO L175 Difference]: Start difference. First operand has 194 places, 221 transitions, 2772 flow. Second operand 7 states and 120 transitions. [2024-06-21 17:49:44,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 3427 flow [2024-06-21 17:49:44,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 249 transitions, 3368 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:44,512 INFO L231 Difference]: Finished difference. Result has 198 places, 229 transitions, 2876 flow [2024-06-21 17:49:44,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2876, PETRI_PLACES=198, PETRI_TRANSITIONS=229} [2024-06-21 17:49:44,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-21 17:49:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 229 transitions, 2876 flow [2024-06-21 17:49:44,512 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 17:49:44,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:44,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:44,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 17:49:44,513 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:44,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:44,513 INFO L85 PathProgramCache]: Analyzing trace with hash 93426486, now seen corresponding path program 3 times [2024-06-21 17:49:44,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:44,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523773145] [2024-06-21 17:49:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:44,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:45,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:45,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523773145] [2024-06-21 17:49:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523773145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:45,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:45,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:49:45,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173527779] [2024-06-21 17:49:45,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:45,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:49:45,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:49:45,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:49:45,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:45,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 229 transitions, 2876 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 17:49:45,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:45,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:46,092 INFO L124 PetriNetUnfolderBase]: 3109/4786 cut-off events. [2024-06-21 17:49:46,092 INFO L125 PetriNetUnfolderBase]: For 266738/266738 co-relation queries the response was YES. [2024-06-21 17:49:46,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36019 conditions, 4786 events. 3109/4786 cut-off events. For 266738/266738 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26078 event pairs, 811 based on Foata normal form. 6/4792 useless extension candidates. Maximal degree in co-relation 35919. Up to 4664 conditions per place. [2024-06-21 17:49:46,130 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 214 selfloop transitions, 32 changer transitions 0/249 dead transitions. [2024-06-21 17:49:46,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 249 transitions, 3428 flow [2024-06-21 17:49:46,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:49:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:49:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-21 17:49:46,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 17:49:46,131 INFO L175 Difference]: Start difference. First operand has 198 places, 229 transitions, 2876 flow. Second operand 6 states and 110 transitions. [2024-06-21 17:49:46,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 249 transitions, 3428 flow [2024-06-21 17:49:46,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 249 transitions, 3335 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 17:49:46,516 INFO L231 Difference]: Finished difference. Result has 200 places, 229 transitions, 2865 flow [2024-06-21 17:49:46,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2865, PETRI_PLACES=200, PETRI_TRANSITIONS=229} [2024-06-21 17:49:46,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 17:49:46,517 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 229 transitions, 2865 flow [2024-06-21 17:49:46,517 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 17:49:46,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:46,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 17:49:46,517 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 17:49:46,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2110981546, now seen corresponding path program 1 times [2024-06-21 17:49:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:46,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776060356] [2024-06-21 17:49:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:46,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:47,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776060356] [2024-06-21 17:49:47,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776060356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:47,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:47,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:49:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284623987] [2024-06-21 17:49:47,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:47,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:49:47,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:49:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:49:47,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:47,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 229 transitions, 2865 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 17:49:47,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:47,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:47,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:48,567 INFO L124 PetriNetUnfolderBase]: 3104/4779 cut-off events. [2024-06-21 17:49:48,567 INFO L125 PetriNetUnfolderBase]: For 269155/269155 co-relation queries the response was YES. [2024-06-21 17:49:48,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36014 conditions, 4779 events. 3104/4779 cut-off events. For 269155/269155 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26015 event pairs, 820 based on Foata normal form. 2/4781 useless extension candidates. Maximal degree in co-relation 35913. Up to 4752 conditions per place. [2024-06-21 17:49:48,615 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 227 selfloop transitions, 11 changer transitions 0/241 dead transitions. [2024-06-21 17:49:48,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 241 transitions, 3395 flow [2024-06-21 17:49:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:49:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:49:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-21 17:49:48,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:49:48,616 INFO L175 Difference]: Start difference. First operand has 200 places, 229 transitions, 2865 flow. Second operand 5 states and 85 transitions. [2024-06-21 17:49:48,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 241 transitions, 3395 flow [2024-06-21 17:49:48,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 241 transitions, 3329 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 17:49:49,002 INFO L231 Difference]: Finished difference. Result has 200 places, 231 transitions, 2860 flow [2024-06-21 17:49:49,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2799, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2860, PETRI_PLACES=200, PETRI_TRANSITIONS=231} [2024-06-21 17:49:49,003 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-21 17:49:49,003 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 231 transitions, 2860 flow [2024-06-21 17:49:49,003 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 17:49:49,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:49,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:49,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 17:49:49,004 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:49,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:49,004 INFO L85 PathProgramCache]: Analyzing trace with hash -30266592, now seen corresponding path program 1 times [2024-06-21 17:49:49,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:49,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818980520] [2024-06-21 17:49:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:49,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:50,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:50,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818980520] [2024-06-21 17:49:50,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818980520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:50,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:50,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:49:50,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224794262] [2024-06-21 17:49:50,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:50,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:49:50,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:49:50,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:49:50,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:50,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 231 transitions, 2860 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:50,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:50,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:50,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:51,294 INFO L124 PetriNetUnfolderBase]: 3145/4852 cut-off events. [2024-06-21 17:49:51,294 INFO L125 PetriNetUnfolderBase]: For 280528/280530 co-relation queries the response was YES. [2024-06-21 17:49:51,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36442 conditions, 4852 events. 3145/4852 cut-off events. For 280528/280530 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26616 event pairs, 750 based on Foata normal form. 14/4866 useless extension candidates. Maximal degree in co-relation 36340. Up to 4516 conditions per place. [2024-06-21 17:49:51,343 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 39 changer transitions 0/269 dead transitions. [2024-06-21 17:49:51,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 269 transitions, 3533 flow [2024-06-21 17:49:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:49:51,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 17:49:51,345 INFO L175 Difference]: Start difference. First operand has 200 places, 231 transitions, 2860 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:49:51,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 269 transitions, 3533 flow [2024-06-21 17:49:51,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 269 transitions, 3488 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 17:49:51,791 INFO L231 Difference]: Finished difference. Result has 206 places, 232 transitions, 2936 flow [2024-06-21 17:49:51,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2936, PETRI_PLACES=206, PETRI_TRANSITIONS=232} [2024-06-21 17:49:51,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-21 17:49:51,791 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 232 transitions, 2936 flow [2024-06-21 17:49:51,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:51,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:51,792 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 17:49:51,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 17:49:51,792 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:51,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash -23779842, now seen corresponding path program 2 times [2024-06-21 17:49:51,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:51,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034798986] [2024-06-21 17:49:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:52,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034798986] [2024-06-21 17:49:52,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034798986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:52,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:52,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:49:52,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816455144] [2024-06-21 17:49:52,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:52,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:49:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:52,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:49:52,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:49:52,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:52,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 232 transitions, 2936 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:52,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:52,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:52,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:53,824 INFO L124 PetriNetUnfolderBase]: 3186/4923 cut-off events. [2024-06-21 17:49:53,824 INFO L125 PetriNetUnfolderBase]: For 294054/294056 co-relation queries the response was YES. [2024-06-21 17:49:53,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37234 conditions, 4923 events. 3186/4923 cut-off events. For 294054/294056 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27191 event pairs, 751 based on Foata normal form. 14/4937 useless extension candidates. Maximal degree in co-relation 37131. Up to 4482 conditions per place. [2024-06-21 17:49:53,879 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 46 changer transitions 0/270 dead transitions. [2024-06-21 17:49:53,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 270 transitions, 3611 flow [2024-06-21 17:49:53,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 17:49:53,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-21 17:49:53,881 INFO L175 Difference]: Start difference. First operand has 206 places, 232 transitions, 2936 flow. Second operand 9 states and 159 transitions. [2024-06-21 17:49:53,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 270 transitions, 3611 flow [2024-06-21 17:49:54,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 270 transitions, 3507 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:54,348 INFO L231 Difference]: Finished difference. Result has 208 places, 233 transitions, 2969 flow [2024-06-21 17:49:54,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2969, PETRI_PLACES=208, PETRI_TRANSITIONS=233} [2024-06-21 17:49:54,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 17:49:54,348 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 233 transitions, 2969 flow [2024-06-21 17:49:54,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:54,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:54,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:54,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 17:49:54,349 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:54,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash -196500372, now seen corresponding path program 3 times [2024-06-21 17:49:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:54,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262733283] [2024-06-21 17:49:54,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:54,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:55,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:55,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262733283] [2024-06-21 17:49:55,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262733283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:55,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:55,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:49:55,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723709667] [2024-06-21 17:49:55,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:55,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:49:55,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:55,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:49:55,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:49:55,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:55,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 233 transitions, 2969 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:55,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:55,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:55,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:56,544 INFO L124 PetriNetUnfolderBase]: 3227/4994 cut-off events. [2024-06-21 17:49:56,544 INFO L125 PetriNetUnfolderBase]: For 304130/304132 co-relation queries the response was YES. [2024-06-21 17:49:56,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37787 conditions, 4994 events. 3227/4994 cut-off events. For 304130/304132 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27757 event pairs, 775 based on Foata normal form. 14/5008 useless extension candidates. Maximal degree in co-relation 37683. Up to 4658 conditions per place. [2024-06-21 17:49:56,598 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 229 selfloop transitions, 42 changer transitions 0/274 dead transitions. [2024-06-21 17:49:56,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 274 transitions, 3664 flow [2024-06-21 17:49:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:56,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:56,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 17:49:56,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-21 17:49:56,599 INFO L175 Difference]: Start difference. First operand has 208 places, 233 transitions, 2969 flow. Second operand 9 states and 163 transitions. [2024-06-21 17:49:56,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 274 transitions, 3664 flow [2024-06-21 17:49:57,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 274 transitions, 3544 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:57,122 INFO L231 Difference]: Finished difference. Result has 210 places, 234 transitions, 2980 flow [2024-06-21 17:49:57,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2980, PETRI_PLACES=210, PETRI_TRANSITIONS=234} [2024-06-21 17:49:57,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-21 17:49:57,123 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 234 transitions, 2980 flow [2024-06-21 17:49:57,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:57,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:57,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 17:49:57,123 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:57,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:57,123 INFO L85 PathProgramCache]: Analyzing trace with hash -2031770438, now seen corresponding path program 4 times [2024-06-21 17:49:57,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:57,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997130282] [2024-06-21 17:49:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:57,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:49:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:49:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:49:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997130282] [2024-06-21 17:49:58,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997130282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:49:58,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:49:58,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:49:58,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553945794] [2024-06-21 17:49:58,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:49:58,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:49:58,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:49:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:49:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:49:58,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:49:58,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 234 transitions, 2980 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:58,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:49:58,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:49:58,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:49:59,219 INFO L124 PetriNetUnfolderBase]: 3268/5064 cut-off events. [2024-06-21 17:49:59,219 INFO L125 PetriNetUnfolderBase]: For 314249/314251 co-relation queries the response was YES. [2024-06-21 17:49:59,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38185 conditions, 5064 events. 3268/5064 cut-off events. For 314249/314251 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28250 event pairs, 846 based on Foata normal form. 14/5078 useless extension candidates. Maximal degree in co-relation 38080. Up to 4891 conditions per place. [2024-06-21 17:49:59,271 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 246 selfloop transitions, 19 changer transitions 0/268 dead transitions. [2024-06-21 17:49:59,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 268 transitions, 3630 flow [2024-06-21 17:49:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:49:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:49:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 17:49:59,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-21 17:49:59,273 INFO L175 Difference]: Start difference. First operand has 210 places, 234 transitions, 2980 flow. Second operand 9 states and 149 transitions. [2024-06-21 17:49:59,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 268 transitions, 3630 flow [2024-06-21 17:49:59,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 268 transitions, 3516 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 17:49:59,754 INFO L231 Difference]: Finished difference. Result has 212 places, 235 transitions, 2942 flow [2024-06-21 17:49:59,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2942, PETRI_PLACES=212, PETRI_TRANSITIONS=235} [2024-06-21 17:49:59,755 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-21 17:49:59,755 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 235 transitions, 2942 flow [2024-06-21 17:49:59,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:49:59,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:49:59,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:49:59,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 17:49:59,756 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:49:59,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:49:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 963534770, now seen corresponding path program 5 times [2024-06-21 17:49:59,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:49:59,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201169618] [2024-06-21 17:49:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:49:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:49:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:00,836 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 17:50:00,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:00,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201169618] [2024-06-21 17:50:00,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201169618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:00,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294048851] [2024-06-21 17:50:00,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:00,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:00,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:00,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:00,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:00,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 2942 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:00,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:00,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:00,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:01,966 INFO L124 PetriNetUnfolderBase]: 3350/5206 cut-off events. [2024-06-21 17:50:01,967 INFO L125 PetriNetUnfolderBase]: For 341547/341549 co-relation queries the response was YES. [2024-06-21 17:50:02,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38909 conditions, 5206 events. 3350/5206 cut-off events. For 341547/341549 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29399 event pairs, 876 based on Foata normal form. 26/5232 useless extension candidates. Maximal degree in co-relation 38803. Up to 4933 conditions per place. [2024-06-21 17:50:02,022 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 237 selfloop transitions, 30 changer transitions 0/270 dead transitions. [2024-06-21 17:50:02,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 270 transitions, 3643 flow [2024-06-21 17:50:02,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:50:02,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:50:02,024 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 2942 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:50:02,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 270 transitions, 3643 flow [2024-06-21 17:50:02,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 270 transitions, 3581 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:02,543 INFO L231 Difference]: Finished difference. Result has 214 places, 237 transitions, 3025 flow [2024-06-21 17:50:02,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3025, PETRI_PLACES=214, PETRI_TRANSITIONS=237} [2024-06-21 17:50:02,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-21 17:50:02,544 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 237 transitions, 3025 flow [2024-06-21 17:50:02,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:02,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:02,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:02,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 17:50:02,545 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:02,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash 963765410, now seen corresponding path program 6 times [2024-06-21 17:50:02,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:02,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222821133] [2024-06-21 17:50:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:02,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:03,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:03,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222821133] [2024-06-21 17:50:03,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222821133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:03,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:03,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:50:03,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927313612] [2024-06-21 17:50:03,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:03,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:50:03,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:50:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:50:03,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:03,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 237 transitions, 3025 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:03,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:03,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:03,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:04,785 INFO L124 PetriNetUnfolderBase]: 3310/5142 cut-off events. [2024-06-21 17:50:04,785 INFO L125 PetriNetUnfolderBase]: For 321542/321544 co-relation queries the response was YES. [2024-06-21 17:50:04,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37432 conditions, 5142 events. 3310/5142 cut-off events. For 321542/321544 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28991 event pairs, 833 based on Foata normal form. 26/5168 useless extension candidates. Maximal degree in co-relation 37325. Up to 4787 conditions per place. [2024-06-21 17:50:04,841 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 230 selfloop transitions, 36 changer transitions 0/269 dead transitions. [2024-06-21 17:50:04,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 269 transitions, 3547 flow [2024-06-21 17:50:04,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 17:50:04,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-21 17:50:04,842 INFO L175 Difference]: Start difference. First operand has 214 places, 237 transitions, 3025 flow. Second operand 9 states and 151 transitions. [2024-06-21 17:50:04,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 269 transitions, 3547 flow [2024-06-21 17:50:05,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 269 transitions, 3427 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:05,324 INFO L231 Difference]: Finished difference. Result has 215 places, 236 transitions, 2881 flow [2024-06-21 17:50:05,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2881, PETRI_PLACES=215, PETRI_TRANSITIONS=236} [2024-06-21 17:50:05,325 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-21 17:50:05,325 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 236 transitions, 2881 flow [2024-06-21 17:50:05,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:05,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:05,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:05,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 17:50:05,325 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:05,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:05,326 INFO L85 PathProgramCache]: Analyzing trace with hash -27871804, now seen corresponding path program 1 times [2024-06-21 17:50:05,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:05,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285799758] [2024-06-21 17:50:05,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:05,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:05,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:05,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285799758] [2024-06-21 17:50:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285799758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:05,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086687741] [2024-06-21 17:50:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:06,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:06,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 236 transitions, 2881 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 17:50:06,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:06,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:06,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:06,915 INFO L124 PetriNetUnfolderBase]: 3318/5154 cut-off events. [2024-06-21 17:50:06,915 INFO L125 PetriNetUnfolderBase]: For 297119/297121 co-relation queries the response was YES. [2024-06-21 17:50:06,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37300 conditions, 5154 events. 3318/5154 cut-off events. For 297119/297121 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29059 event pairs, 849 based on Foata normal form. 6/5160 useless extension candidates. Maximal degree in co-relation 37192. Up to 4883 conditions per place. [2024-06-21 17:50:06,974 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 59 changer transitions 0/269 dead transitions. [2024-06-21 17:50:06,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 269 transitions, 3745 flow [2024-06-21 17:50:06,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:50:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:50:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-21 17:50:06,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-21 17:50:06,975 INFO L175 Difference]: Start difference. First operand has 215 places, 236 transitions, 2881 flow. Second operand 6 states and 119 transitions. [2024-06-21 17:50:06,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 269 transitions, 3745 flow [2024-06-21 17:50:07,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 269 transitions, 3533 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 17:50:07,469 INFO L231 Difference]: Finished difference. Result has 213 places, 244 transitions, 3021 flow [2024-06-21 17:50:07,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2669, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3021, PETRI_PLACES=213, PETRI_TRANSITIONS=244} [2024-06-21 17:50:07,469 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 17:50:07,470 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 244 transitions, 3021 flow [2024-06-21 17:50:07,470 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 17:50:07,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:07,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:07,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 17:50:07,470 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:07,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:07,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1935600321, now seen corresponding path program 1 times [2024-06-21 17:50:07,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:07,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834336904] [2024-06-21 17:50:07,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:07,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:07,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:08,471 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 17:50:08,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834336904] [2024-06-21 17:50:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834336904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:08,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:08,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:08,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911803047] [2024-06-21 17:50:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:08,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:08,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:08,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:08,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:08,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 244 transitions, 3021 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:08,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:08,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:08,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:09,796 INFO L124 PetriNetUnfolderBase]: 3430/5310 cut-off events. [2024-06-21 17:50:09,796 INFO L125 PetriNetUnfolderBase]: For 314382/314384 co-relation queries the response was YES. [2024-06-21 17:50:09,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38479 conditions, 5310 events. 3430/5310 cut-off events. For 314382/314384 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 29917 event pairs, 878 based on Foata normal form. 6/5316 useless extension candidates. Maximal degree in co-relation 38371. Up to 4996 conditions per place. [2024-06-21 17:50:09,852 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 225 selfloop transitions, 79 changer transitions 0/307 dead transitions. [2024-06-21 17:50:09,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 307 transitions, 4149 flow [2024-06-21 17:50:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:50:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:50:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 17:50:09,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 17:50:09,854 INFO L175 Difference]: Start difference. First operand has 213 places, 244 transitions, 3021 flow. Second operand 11 states and 195 transitions. [2024-06-21 17:50:09,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 307 transitions, 4149 flow [2024-06-21 17:50:10,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 307 transitions, 4060 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-21 17:50:10,440 INFO L231 Difference]: Finished difference. Result has 224 places, 268 transitions, 3441 flow [2024-06-21 17:50:10,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3441, PETRI_PLACES=224, PETRI_TRANSITIONS=268} [2024-06-21 17:50:10,440 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 17:50:10,441 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 268 transitions, 3441 flow [2024-06-21 17:50:10,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:10,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:10,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:10,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 17:50:10,441 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:10,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:10,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1709594783, now seen corresponding path program 1 times [2024-06-21 17:50:10,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:10,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820351230] [2024-06-21 17:50:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:11,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820351230] [2024-06-21 17:50:11,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820351230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:11,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:11,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:11,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198827357] [2024-06-21 17:50:11,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:11,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:11,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:11,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:11,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:11,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:11,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 268 transitions, 3441 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 17:50:11,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:11,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:11,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:12,106 INFO L124 PetriNetUnfolderBase]: 3666/5637 cut-off events. [2024-06-21 17:50:12,106 INFO L125 PetriNetUnfolderBase]: For 358235/358237 co-relation queries the response was YES. [2024-06-21 17:50:12,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42412 conditions, 5637 events. 3666/5637 cut-off events. For 358235/358237 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31797 event pairs, 841 based on Foata normal form. 14/5651 useless extension candidates. Maximal degree in co-relation 42300. Up to 4976 conditions per place. [2024-06-21 17:50:12,162 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 253 selfloop transitions, 65 changer transitions 0/321 dead transitions. [2024-06-21 17:50:12,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 321 transitions, 4724 flow [2024-06-21 17:50:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:50:12,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-21 17:50:12,164 INFO L175 Difference]: Start difference. First operand has 224 places, 268 transitions, 3441 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:50:12,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 321 transitions, 4724 flow [2024-06-21 17:50:12,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 321 transitions, 4562 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:12,642 INFO L231 Difference]: Finished difference. Result has 230 places, 284 transitions, 3735 flow [2024-06-21 17:50:12,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3735, PETRI_PLACES=230, PETRI_TRANSITIONS=284} [2024-06-21 17:50:12,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-21 17:50:12,643 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 284 transitions, 3735 flow [2024-06-21 17:50:12,643 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 17:50:12,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:12,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 17:50:12,643 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 17:50:12,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1709714753, now seen corresponding path program 2 times [2024-06-21 17:50:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834183492] [2024-06-21 17:50:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:13,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:13,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:13,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834183492] [2024-06-21 17:50:13,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834183492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:13,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:13,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:13,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870624651] [2024-06-21 17:50:13,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:13,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:13,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:13,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:13,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:13,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 284 transitions, 3735 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 17:50:13,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:13,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:13,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:14,598 INFO L124 PetriNetUnfolderBase]: 3756/5762 cut-off events. [2024-06-21 17:50:14,598 INFO L125 PetriNetUnfolderBase]: For 378920/378922 co-relation queries the response was YES. [2024-06-21 17:50:14,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45046 conditions, 5762 events. 3756/5762 cut-off events. For 378920/378922 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32488 event pairs, 916 based on Foata normal form. 14/5776 useless extension candidates. Maximal degree in co-relation 44930. Up to 5478 conditions per place. [2024-06-21 17:50:14,658 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 262 selfloop transitions, 58 changer transitions 0/323 dead transitions. [2024-06-21 17:50:14,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 323 transitions, 4682 flow [2024-06-21 17:50:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:50:14,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:50:14,659 INFO L175 Difference]: Start difference. First operand has 230 places, 284 transitions, 3735 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:50:14,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 323 transitions, 4682 flow [2024-06-21 17:50:15,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 323 transitions, 4526 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 17:50:15,311 INFO L231 Difference]: Finished difference. Result has 235 places, 295 transitions, 3932 flow [2024-06-21 17:50:15,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3932, PETRI_PLACES=235, PETRI_TRANSITIONS=295} [2024-06-21 17:50:15,311 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 17:50:15,312 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 295 transitions, 3932 flow [2024-06-21 17:50:15,312 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 17:50:15,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:15,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:15,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 17:50:15,312 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:15,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1886846273, now seen corresponding path program 3 times [2024-06-21 17:50:15,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:15,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58041425] [2024-06-21 17:50:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:15,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:15,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:15,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58041425] [2024-06-21 17:50:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58041425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:15,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:15,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822647233] [2024-06-21 17:50:15,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:16,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:16,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 295 transitions, 3932 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 17:50:16,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:16,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:16,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:17,281 INFO L124 PetriNetUnfolderBase]: 4002/6104 cut-off events. [2024-06-21 17:50:17,281 INFO L125 PetriNetUnfolderBase]: For 402277/402279 co-relation queries the response was YES. [2024-06-21 17:50:17,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48136 conditions, 6104 events. 4002/6104 cut-off events. For 402277/402279 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34502 event pairs, 936 based on Foata normal form. 14/6118 useless extension candidates. Maximal degree in co-relation 48018. Up to 5570 conditions per place. [2024-06-21 17:50:17,345 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 278 selfloop transitions, 76 changer transitions 0/357 dead transitions. [2024-06-21 17:50:17,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 357 transitions, 5442 flow [2024-06-21 17:50:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 17:50:17,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2024-06-21 17:50:17,347 INFO L175 Difference]: Start difference. First operand has 235 places, 295 transitions, 3932 flow. Second operand 9 states and 158 transitions. [2024-06-21 17:50:17,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 357 transitions, 5442 flow [2024-06-21 17:50:17,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 357 transitions, 5234 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:17,998 INFO L231 Difference]: Finished difference. Result has 242 places, 321 transitions, 4447 flow [2024-06-21 17:50:17,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4447, PETRI_PLACES=242, PETRI_TRANSITIONS=321} [2024-06-21 17:50:17,999 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 17:50:17,999 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 321 transitions, 4447 flow [2024-06-21 17:50:17,999 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 17:50:17,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:17,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:18,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 17:50:18,000 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:18,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1887092537, now seen corresponding path program 1 times [2024-06-21 17:50:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:18,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277132039] [2024-06-21 17:50:18,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:18,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:19,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:19,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277132039] [2024-06-21 17:50:19,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277132039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:19,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993830134] [2024-06-21 17:50:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:19,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:19,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 321 transitions, 4447 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:19,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:19,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:19,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:20,240 INFO L124 PetriNetUnfolderBase]: 4015/6122 cut-off events. [2024-06-21 17:50:20,241 INFO L125 PetriNetUnfolderBase]: For 398480/398480 co-relation queries the response was YES. [2024-06-21 17:50:20,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48622 conditions, 6122 events. 4015/6122 cut-off events. For 398480/398480 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34643 event pairs, 927 based on Foata normal form. 2/6124 useless extension candidates. Maximal degree in co-relation 48500. Up to 6059 conditions per place. [2024-06-21 17:50:20,315 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 324 selfloop transitions, 27 changer transitions 0/354 dead transitions. [2024-06-21 17:50:20,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 354 transitions, 5356 flow [2024-06-21 17:50:20,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:50:20,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:50:20,316 INFO L175 Difference]: Start difference. First operand has 242 places, 321 transitions, 4447 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:50:20,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 354 transitions, 5356 flow [2024-06-21 17:50:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 354 transitions, 5189 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-21 17:50:20,978 INFO L231 Difference]: Finished difference. Result has 250 places, 333 transitions, 4537 flow [2024-06-21 17:50:20,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4537, PETRI_PLACES=250, PETRI_TRANSITIONS=333} [2024-06-21 17:50:20,979 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-21 17:50:20,979 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 333 transitions, 4537 flow [2024-06-21 17:50:20,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:20,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:20,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 17:50:20,979 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:20,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:20,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1310145009, now seen corresponding path program 2 times [2024-06-21 17:50:20,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:20,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792428613] [2024-06-21 17:50:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:20,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:21,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792428613] [2024-06-21 17:50:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792428613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:21,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:21,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:50:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189184771] [2024-06-21 17:50:21,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:50:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:50:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:50:21,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:21,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 333 transitions, 4537 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:21,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:21,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:21,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:23,227 INFO L124 PetriNetUnfolderBase]: 4085/6221 cut-off events. [2024-06-21 17:50:23,228 INFO L125 PetriNetUnfolderBase]: For 412637/412639 co-relation queries the response was YES. [2024-06-21 17:50:23,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49258 conditions, 6221 events. 4085/6221 cut-off events. For 412637/412639 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 35217 event pairs, 898 based on Foata normal form. 6/6227 useless extension candidates. Maximal degree in co-relation 49132. Up to 5863 conditions per place. [2024-06-21 17:50:23,305 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 289 selfloop transitions, 86 changer transitions 0/378 dead transitions. [2024-06-21 17:50:23,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 378 transitions, 5624 flow [2024-06-21 17:50:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:50:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:50:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-21 17:50:23,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2024-06-21 17:50:23,306 INFO L175 Difference]: Start difference. First operand has 250 places, 333 transitions, 4537 flow. Second operand 10 states and 168 transitions. [2024-06-21 17:50:23,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 378 transitions, 5624 flow [2024-06-21 17:50:24,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 378 transitions, 5536 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 17:50:24,116 INFO L231 Difference]: Finished difference. Result has 260 places, 352 transitions, 4980 flow [2024-06-21 17:50:24,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4980, PETRI_PLACES=260, PETRI_TRANSITIONS=352} [2024-06-21 17:50:24,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-21 17:50:24,117 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 352 transitions, 4980 flow [2024-06-21 17:50:24,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:50:24,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:24,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:24,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 17:50:24,118 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:24,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:24,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1249175903, now seen corresponding path program 4 times [2024-06-21 17:50:24,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:24,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492016136] [2024-06-21 17:50:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:24,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:24,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:24,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492016136] [2024-06-21 17:50:24,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492016136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:24,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:24,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501774589] [2024-06-21 17:50:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:24,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:24,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:24,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:24,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:24,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 352 transitions, 4980 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 17:50:24,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:24,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:24,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:26,077 INFO L124 PetriNetUnfolderBase]: 4163/6328 cut-off events. [2024-06-21 17:50:26,077 INFO L125 PetriNetUnfolderBase]: For 447729/447729 co-relation queries the response was YES. [2024-06-21 17:50:26,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51208 conditions, 6328 events. 4163/6328 cut-off events. For 447729/447729 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35907 event pairs, 953 based on Foata normal form. 6/6334 useless extension candidates. Maximal degree in co-relation 51078. Up to 6070 conditions per place. [2024-06-21 17:50:26,163 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 346 selfloop transitions, 46 changer transitions 0/395 dead transitions. [2024-06-21 17:50:26,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 395 transitions, 6386 flow [2024-06-21 17:50:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 17:50:26,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-21 17:50:26,165 INFO L175 Difference]: Start difference. First operand has 260 places, 352 transitions, 4980 flow. Second operand 8 states and 143 transitions. [2024-06-21 17:50:26,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 395 transitions, 6386 flow [2024-06-21 17:50:26,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 395 transitions, 6199 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:26,949 INFO L231 Difference]: Finished difference. Result has 265 places, 363 transitions, 5168 flow [2024-06-21 17:50:26,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5168, PETRI_PLACES=265, PETRI_TRANSITIONS=363} [2024-06-21 17:50:26,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-21 17:50:26,950 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 363 transitions, 5168 flow [2024-06-21 17:50:26,950 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 17:50:26,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:26,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:26,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 17:50:26,951 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:26,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:26,951 INFO L85 PathProgramCache]: Analyzing trace with hash 134413633, now seen corresponding path program 5 times [2024-06-21 17:50:26,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:26,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299812985] [2024-06-21 17:50:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:27,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299812985] [2024-06-21 17:50:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299812985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:27,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:27,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:27,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368136400] [2024-06-21 17:50:27,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:27,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:27,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:27,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:27,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:27,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 363 transitions, 5168 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 17:50:27,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:27,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:27,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:28,878 INFO L124 PetriNetUnfolderBase]: 4145/6304 cut-off events. [2024-06-21 17:50:28,878 INFO L125 PetriNetUnfolderBase]: For 436763/436763 co-relation queries the response was YES. [2024-06-21 17:50:28,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50522 conditions, 6304 events. 4145/6304 cut-off events. For 436763/436763 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35721 event pairs, 969 based on Foata normal form. 6/6310 useless extension candidates. Maximal degree in co-relation 50390. Up to 6219 conditions per place. [2024-06-21 17:50:28,956 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 355 selfloop transitions, 30 changer transitions 0/388 dead transitions. [2024-06-21 17:50:28,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 388 transitions, 6059 flow [2024-06-21 17:50:28,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:28,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:28,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 17:50:28,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-21 17:50:28,957 INFO L175 Difference]: Start difference. First operand has 265 places, 363 transitions, 5168 flow. Second operand 8 states and 133 transitions. [2024-06-21 17:50:28,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 388 transitions, 6059 flow [2024-06-21 17:50:29,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 388 transitions, 5958 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-21 17:50:29,733 INFO L231 Difference]: Finished difference. Result has 271 places, 364 transitions, 5171 flow [2024-06-21 17:50:29,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5071, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5171, PETRI_PLACES=271, PETRI_TRANSITIONS=364} [2024-06-21 17:50:29,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 17:50:29,734 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 364 transitions, 5171 flow [2024-06-21 17:50:29,734 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 17:50:29,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:29,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:29,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 17:50:29,734 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:29,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:29,734 INFO L85 PathProgramCache]: Analyzing trace with hash 362194813, now seen corresponding path program 6 times [2024-06-21 17:50:29,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:29,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915038565] [2024-06-21 17:50:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:29,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:30,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:30,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915038565] [2024-06-21 17:50:30,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915038565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:30,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:30,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:30,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590117405] [2024-06-21 17:50:30,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:30,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:30,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:30,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:30,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:30,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:30,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 364 transitions, 5171 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 17:50:30,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:30,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:30,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:31,671 INFO L124 PetriNetUnfolderBase]: 4175/6346 cut-off events. [2024-06-21 17:50:31,672 INFO L125 PetriNetUnfolderBase]: For 449082/449082 co-relation queries the response was YES. [2024-06-21 17:50:31,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50889 conditions, 6346 events. 4175/6346 cut-off events. For 449082/449082 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 35997 event pairs, 968 based on Foata normal form. 6/6352 useless extension candidates. Maximal degree in co-relation 50755. Up to 6217 conditions per place. [2024-06-21 17:50:31,754 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 361 selfloop transitions, 30 changer transitions 0/394 dead transitions. [2024-06-21 17:50:31,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 394 transitions, 6247 flow [2024-06-21 17:50:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 17:50:31,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.428125 [2024-06-21 17:50:31,756 INFO L175 Difference]: Start difference. First operand has 271 places, 364 transitions, 5171 flow. Second operand 8 states and 137 transitions. [2024-06-21 17:50:31,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 394 transitions, 6247 flow [2024-06-21 17:50:32,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 394 transitions, 6047 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 17:50:32,891 INFO L231 Difference]: Finished difference. Result has 271 places, 367 transitions, 5109 flow [2024-06-21 17:50:32,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5109, PETRI_PLACES=271, PETRI_TRANSITIONS=367} [2024-06-21 17:50:32,892 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-21 17:50:32,892 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 367 transitions, 5109 flow [2024-06-21 17:50:32,892 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 17:50:32,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:32,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:32,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 17:50:32,892 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:32,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 362523103, now seen corresponding path program 7 times [2024-06-21 17:50:32,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:32,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894175828] [2024-06-21 17:50:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:32,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:33,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:33,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894175828] [2024-06-21 17:50:33,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894175828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:33,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:33,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:33,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730654320] [2024-06-21 17:50:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:33,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:33,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:33,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 367 transitions, 5109 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 17:50:33,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:33,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:33,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:34,753 INFO L124 PetriNetUnfolderBase]: 4205/6388 cut-off events. [2024-06-21 17:50:34,753 INFO L125 PetriNetUnfolderBase]: For 461509/461509 co-relation queries the response was YES. [2024-06-21 17:50:34,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51247 conditions, 6388 events. 4205/6388 cut-off events. For 461509/461509 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 36243 event pairs, 981 based on Foata normal form. 6/6394 useless extension candidates. Maximal degree in co-relation 51113. Up to 6318 conditions per place. [2024-06-21 17:50:35,024 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 362 selfloop transitions, 27 changer transitions 0/392 dead transitions. [2024-06-21 17:50:35,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 392 transitions, 6053 flow [2024-06-21 17:50:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:50:35,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:50:35,026 INFO L175 Difference]: Start difference. First operand has 271 places, 367 transitions, 5109 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:50:35,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 392 transitions, 6053 flow [2024-06-21 17:50:35,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 392 transitions, 5883 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:35,875 INFO L231 Difference]: Finished difference. Result has 273 places, 372 transitions, 5105 flow [2024-06-21 17:50:35,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4961, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5105, PETRI_PLACES=273, PETRI_TRANSITIONS=372} [2024-06-21 17:50:35,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-21 17:50:35,876 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 372 transitions, 5105 flow [2024-06-21 17:50:35,876 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 17:50:35,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:35,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:35,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 17:50:35,876 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:35,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash 489092569, now seen corresponding path program 1 times [2024-06-21 17:50:35,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:35,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197898214] [2024-06-21 17:50:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:35,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197898214] [2024-06-21 17:50:36,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197898214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:36,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:36,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119291587] [2024-06-21 17:50:36,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:36,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:36,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:36,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 372 transitions, 5105 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 17:50:36,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:36,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:36,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:38,226 INFO L124 PetriNetUnfolderBase]: 4215/6402 cut-off events. [2024-06-21 17:50:38,226 INFO L125 PetriNetUnfolderBase]: For 464457/464457 co-relation queries the response was YES. [2024-06-21 17:50:38,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51266 conditions, 6402 events. 4215/6402 cut-off events. For 464457/464457 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36344 event pairs, 977 based on Foata normal form. 2/6404 useless extension candidates. Maximal degree in co-relation 51131. Up to 6342 conditions per place. [2024-06-21 17:50:38,309 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 362 selfloop transitions, 28 changer transitions 0/393 dead transitions. [2024-06-21 17:50:38,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 393 transitions, 6010 flow [2024-06-21 17:50:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 17:50:38,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:50:38,310 INFO L175 Difference]: Start difference. First operand has 273 places, 372 transitions, 5105 flow. Second operand 8 states and 128 transitions. [2024-06-21 17:50:38,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 393 transitions, 6010 flow [2024-06-21 17:50:39,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 393 transitions, 5912 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:39,557 INFO L231 Difference]: Finished difference. Result has 277 places, 376 transitions, 5160 flow [2024-06-21 17:50:39,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5160, PETRI_PLACES=277, PETRI_TRANSITIONS=376} [2024-06-21 17:50:39,557 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 17:50:39,557 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 376 transitions, 5160 flow [2024-06-21 17:50:39,557 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 17:50:39,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:39,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:39,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 17:50:39,558 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:39,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:39,558 INFO L85 PathProgramCache]: Analyzing trace with hash 411425429, now seen corresponding path program 8 times [2024-06-21 17:50:39,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:39,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760648255] [2024-06-21 17:50:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:39,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:40,148 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 17:50:40,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:40,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760648255] [2024-06-21 17:50:40,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760648255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:40,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:40,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:40,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443841406] [2024-06-21 17:50:40,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:40,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:40,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:40,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:40,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 376 transitions, 5160 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 17:50:40,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:40,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:40,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:41,533 INFO L124 PetriNetUnfolderBase]: 4245/6444 cut-off events. [2024-06-21 17:50:41,533 INFO L125 PetriNetUnfolderBase]: For 485826/485826 co-relation queries the response was YES. [2024-06-21 17:50:41,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51690 conditions, 6444 events. 4245/6444 cut-off events. For 485826/485826 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36538 event pairs, 989 based on Foata normal form. 6/6450 useless extension candidates. Maximal degree in co-relation 51553. Up to 6389 conditions per place. [2024-06-21 17:50:41,619 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 373 selfloop transitions, 22 changer transitions 0/398 dead transitions. [2024-06-21 17:50:41,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 6092 flow [2024-06-21 17:50:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 17:50:41,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-21 17:50:41,620 INFO L175 Difference]: Start difference. First operand has 277 places, 376 transitions, 5160 flow. Second operand 8 states and 125 transitions. [2024-06-21 17:50:41,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 6092 flow [2024-06-21 17:50:42,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 398 transitions, 5984 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 17:50:42,701 INFO L231 Difference]: Finished difference. Result has 281 places, 381 transitions, 5200 flow [2024-06-21 17:50:42,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5200, PETRI_PLACES=281, PETRI_TRANSITIONS=381} [2024-06-21 17:50:42,702 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-21 17:50:42,702 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 381 transitions, 5200 flow [2024-06-21 17:50:42,702 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 17:50:42,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:42,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:42,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 17:50:42,702 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:42,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:42,703 INFO L85 PathProgramCache]: Analyzing trace with hash 488676673, now seen corresponding path program 9 times [2024-06-21 17:50:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:42,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957983204] [2024-06-21 17:50:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:42,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:43,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:43,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957983204] [2024-06-21 17:50:43,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957983204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:43,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:43,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:43,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586752736] [2024-06-21 17:50:43,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:43,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:43,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:43,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:43,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:43,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:43,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 381 transitions, 5200 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 17:50:43,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:43,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:43,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:44,716 INFO L124 PetriNetUnfolderBase]: 4290/6507 cut-off events. [2024-06-21 17:50:44,716 INFO L125 PetriNetUnfolderBase]: For 501867/501867 co-relation queries the response was YES. [2024-06-21 17:50:44,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52445 conditions, 6507 events. 4290/6507 cut-off events. For 501867/501867 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36954 event pairs, 983 based on Foata normal form. 6/6513 useless extension candidates. Maximal degree in co-relation 52306. Up to 6417 conditions per place. [2024-06-21 17:50:44,803 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 378 selfloop transitions, 30 changer transitions 0/411 dead transitions. [2024-06-21 17:50:44,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 411 transitions, 6262 flow [2024-06-21 17:50:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:50:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:50:44,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 17:50:44,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-21 17:50:44,804 INFO L175 Difference]: Start difference. First operand has 281 places, 381 transitions, 5200 flow. Second operand 9 states and 141 transitions. [2024-06-21 17:50:44,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 411 transitions, 6262 flow [2024-06-21 17:50:45,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 411 transitions, 6164 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:45,759 INFO L231 Difference]: Finished difference. Result has 285 places, 389 transitions, 5351 flow [2024-06-21 17:50:45,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5351, PETRI_PLACES=285, PETRI_TRANSITIONS=389} [2024-06-21 17:50:45,759 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-21 17:50:45,760 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 389 transitions, 5351 flow [2024-06-21 17:50:45,760 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 17:50:45,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:45,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:45,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 17:50:45,760 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:45,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:45,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1438612859, now seen corresponding path program 10 times [2024-06-21 17:50:45,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:45,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209888914] [2024-06-21 17:50:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:45,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:46,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:46,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209888914] [2024-06-21 17:50:46,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209888914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:46,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:46,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:46,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40536182] [2024-06-21 17:50:46,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:46,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:46,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:46,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:46,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 389 transitions, 5351 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 17:50:46,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:46,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:46,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:47,776 INFO L124 PetriNetUnfolderBase]: 4302/6526 cut-off events. [2024-06-21 17:50:47,776 INFO L125 PetriNetUnfolderBase]: For 512567/512569 co-relation queries the response was YES. [2024-06-21 17:50:47,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52340 conditions, 6526 events. 4302/6526 cut-off events. For 512567/512569 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37062 event pairs, 889 based on Foata normal form. 14/6540 useless extension candidates. Maximal degree in co-relation 52200. Up to 5887 conditions per place. [2024-06-21 17:50:47,868 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 345 selfloop transitions, 80 changer transitions 0/428 dead transitions. [2024-06-21 17:50:47,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 428 transitions, 6535 flow [2024-06-21 17:50:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:47,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:47,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:50:47,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:50:47,869 INFO L175 Difference]: Start difference. First operand has 285 places, 389 transitions, 5351 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:50:47,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 428 transitions, 6535 flow [2024-06-21 17:50:49,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 428 transitions, 6392 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 17:50:49,152 INFO L231 Difference]: Finished difference. Result has 288 places, 392 transitions, 5509 flow [2024-06-21 17:50:49,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5509, PETRI_PLACES=288, PETRI_TRANSITIONS=392} [2024-06-21 17:50:49,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-21 17:50:49,153 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 392 transitions, 5509 flow [2024-06-21 17:50:49,153 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 17:50:49,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:49,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:49,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 17:50:49,154 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:49,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1442978347, now seen corresponding path program 2 times [2024-06-21 17:50:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:49,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032007177] [2024-06-21 17:50:49,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:49,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:49,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032007177] [2024-06-21 17:50:49,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032007177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:49,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:49,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:49,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702110365] [2024-06-21 17:50:49,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:49,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:49,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:49,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:49,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:49,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 392 transitions, 5509 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 17:50:49,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:49,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:49,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:51,300 INFO L124 PetriNetUnfolderBase]: 4306/6532 cut-off events. [2024-06-21 17:50:51,301 INFO L125 PetriNetUnfolderBase]: For 507231/507233 co-relation queries the response was YES. [2024-06-21 17:50:51,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52679 conditions, 6532 events. 4306/6532 cut-off events. For 507231/507233 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37123 event pairs, 918 based on Foata normal form. 6/6538 useless extension candidates. Maximal degree in co-relation 52537. Up to 6106 conditions per place. [2024-06-21 17:50:51,388 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 312 selfloop transitions, 103 changer transitions 0/418 dead transitions. [2024-06-21 17:50:51,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 418 transitions, 6611 flow [2024-06-21 17:50:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:50:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:50:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-21 17:50:51,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-21 17:50:51,390 INFO L175 Difference]: Start difference. First operand has 288 places, 392 transitions, 5509 flow. Second operand 6 states and 116 transitions. [2024-06-21 17:50:51,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 418 transitions, 6611 flow [2024-06-21 17:50:52,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 418 transitions, 6394 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 17:50:52,543 INFO L231 Difference]: Finished difference. Result has 286 places, 395 transitions, 5617 flow [2024-06-21 17:50:52,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5292, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5617, PETRI_PLACES=286, PETRI_TRANSITIONS=395} [2024-06-21 17:50:52,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-21 17:50:52,544 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 395 transitions, 5617 flow [2024-06-21 17:50:52,544 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 17:50:52,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:52,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 17:50:52,544 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:52,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1437264427, now seen corresponding path program 3 times [2024-06-21 17:50:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:52,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026389140] [2024-06-21 17:50:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:53,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026389140] [2024-06-21 17:50:53,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026389140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:53,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939986534] [2024-06-21 17:50:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:53,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:53,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:53,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 395 transitions, 5617 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 17:50:53,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:53,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:54,584 INFO L124 PetriNetUnfolderBase]: 4296/6517 cut-off events. [2024-06-21 17:50:54,585 INFO L125 PetriNetUnfolderBase]: For 511952/511952 co-relation queries the response was YES. [2024-06-21 17:50:54,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52467 conditions, 6517 events. 4296/6517 cut-off events. For 511952/511952 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37007 event pairs, 978 based on Foata normal form. 2/6519 useless extension candidates. Maximal degree in co-relation 52326. Up to 6413 conditions per place. [2024-06-21 17:50:54,666 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 364 selfloop transitions, 46 changer transitions 0/413 dead transitions. [2024-06-21 17:50:54,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 413 transitions, 6489 flow [2024-06-21 17:50:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:50:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:50:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 17:50:54,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:50:54,667 INFO L175 Difference]: Start difference. First operand has 286 places, 395 transitions, 5617 flow. Second operand 6 states and 108 transitions. [2024-06-21 17:50:54,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 413 transitions, 6489 flow [2024-06-21 17:50:55,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 413 transitions, 6273 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 17:50:55,603 INFO L231 Difference]: Finished difference. Result has 288 places, 395 transitions, 5523 flow [2024-06-21 17:50:55,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5523, PETRI_PLACES=288, PETRI_TRANSITIONS=395} [2024-06-21 17:50:55,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 247 predicate places. [2024-06-21 17:50:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 395 transitions, 5523 flow [2024-06-21 17:50:55,604 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 17:50:55,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:55,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:55,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 17:50:55,604 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:55,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1665581473, now seen corresponding path program 11 times [2024-06-21 17:50:55,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:55,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137856204] [2024-06-21 17:50:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:56,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:56,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137856204] [2024-06-21 17:50:56,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137856204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:56,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:56,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:56,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831433422] [2024-06-21 17:50:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:56,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:56,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:56,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:56,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 395 transitions, 5523 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 17:50:56,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:56,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:56,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:50:57,750 INFO L124 PetriNetUnfolderBase]: 4278/6493 cut-off events. [2024-06-21 17:50:57,750 INFO L125 PetriNetUnfolderBase]: For 506009/506009 co-relation queries the response was YES. [2024-06-21 17:50:57,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51476 conditions, 6493 events. 4278/6493 cut-off events. For 506009/506009 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36992 event pairs, 961 based on Foata normal form. 6/6499 useless extension candidates. Maximal degree in co-relation 51335. Up to 6276 conditions per place. [2024-06-21 17:50:57,821 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 368 selfloop transitions, 55 changer transitions 0/426 dead transitions. [2024-06-21 17:50:57,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 426 transitions, 6619 flow [2024-06-21 17:50:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:50:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:50:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:50:57,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:50:57,822 INFO L175 Difference]: Start difference. First operand has 288 places, 395 transitions, 5523 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:50:57,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 426 transitions, 6619 flow [2024-06-21 17:50:59,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 426 transitions, 6326 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 17:50:59,032 INFO L231 Difference]: Finished difference. Result has 289 places, 395 transitions, 5360 flow [2024-06-21 17:50:59,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5360, PETRI_PLACES=289, PETRI_TRANSITIONS=395} [2024-06-21 17:50:59,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 17:50:59,033 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 395 transitions, 5360 flow [2024-06-21 17:50:59,033 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 17:50:59,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:50:59,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:50:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 17:50:59,033 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:50:59,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:50:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1665344323, now seen corresponding path program 12 times [2024-06-21 17:50:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:50:59,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177654049] [2024-06-21 17:50:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:50:59,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:50:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:50:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:50:59,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:50:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177654049] [2024-06-21 17:50:59,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177654049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:50:59,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:50:59,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:50:59,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554085502] [2024-06-21 17:50:59,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:50:59,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:50:59,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:50:59,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:50:59,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:50:59,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:50:59,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 395 transitions, 5360 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 17:50:59,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:50:59,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:50:59,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:00,968 INFO L124 PetriNetUnfolderBase]: 4260/6469 cut-off events. [2024-06-21 17:51:00,968 INFO L125 PetriNetUnfolderBase]: For 476644/476644 co-relation queries the response was YES. [2024-06-21 17:51:01,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50474 conditions, 6469 events. 4260/6469 cut-off events. For 476644/476644 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36830 event pairs, 968 based on Foata normal form. 6/6475 useless extension candidates. Maximal degree in co-relation 50333. Up to 6362 conditions per place. [2024-06-21 17:51:01,050 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 381 selfloop transitions, 33 changer transitions 0/417 dead transitions. [2024-06-21 17:51:01,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 417 transitions, 6260 flow [2024-06-21 17:51:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:01,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 17:51:01,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-21 17:51:01,051 INFO L175 Difference]: Start difference. First operand has 289 places, 395 transitions, 5360 flow. Second operand 7 states and 121 transitions. [2024-06-21 17:51:01,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 417 transitions, 6260 flow [2024-06-21 17:51:02,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 417 transitions, 6127 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:02,150 INFO L231 Difference]: Finished difference. Result has 290 places, 395 transitions, 5307 flow [2024-06-21 17:51:02,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5227, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5307, PETRI_PLACES=290, PETRI_TRANSITIONS=395} [2024-06-21 17:51:02,151 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-21 17:51:02,151 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 395 transitions, 5307 flow [2024-06-21 17:51:02,151 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 17:51:02,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:02,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:02,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 17:51:02,151 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:02,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:02,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1442969419, now seen corresponding path program 2 times [2024-06-21 17:51:02,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:02,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177179336] [2024-06-21 17:51:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:02,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:03,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:03,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177179336] [2024-06-21 17:51:03,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177179336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:03,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:03,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:03,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830157525] [2024-06-21 17:51:03,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:03,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:03,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:03,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:03,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:03,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 395 transitions, 5307 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:03,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:03,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:03,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:04,518 INFO L124 PetriNetUnfolderBase]: 4260/6469 cut-off events. [2024-06-21 17:51:04,518 INFO L125 PetriNetUnfolderBase]: For 466336/466336 co-relation queries the response was YES. [2024-06-21 17:51:04,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50145 conditions, 6469 events. 4260/6469 cut-off events. For 466336/466336 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 36780 event pairs, 946 based on Foata normal form. 4/6473 useless extension candidates. Maximal degree in co-relation 50003. Up to 6386 conditions per place. [2024-06-21 17:51:04,606 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 380 selfloop transitions, 33 changer transitions 0/416 dead transitions. [2024-06-21 17:51:04,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 416 transitions, 6257 flow [2024-06-21 17:51:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-21 17:51:04,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 17:51:04,607 INFO L175 Difference]: Start difference. First operand has 290 places, 395 transitions, 5307 flow. Second operand 6 states and 105 transitions. [2024-06-21 17:51:04,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 416 transitions, 6257 flow [2024-06-21 17:51:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 416 transitions, 6157 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 17:51:05,730 INFO L231 Difference]: Finished difference. Result has 289 places, 398 transitions, 5364 flow [2024-06-21 17:51:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5207, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5364, PETRI_PLACES=289, PETRI_TRANSITIONS=398} [2024-06-21 17:51:05,731 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 17:51:05,731 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 398 transitions, 5364 flow [2024-06-21 17:51:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:05,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:05,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 17:51:05,731 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:05,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1438735681, now seen corresponding path program 3 times [2024-06-21 17:51:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100001429] [2024-06-21 17:51:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:06,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:06,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100001429] [2024-06-21 17:51:06,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100001429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:06,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:06,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:06,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28472348] [2024-06-21 17:51:06,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:06,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:06,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:06,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:06,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 398 transitions, 5364 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:06,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:06,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:06,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:08,373 INFO L124 PetriNetUnfolderBase]: 4268/6482 cut-off events. [2024-06-21 17:51:08,373 INFO L125 PetriNetUnfolderBase]: For 459005/459007 co-relation queries the response was YES. [2024-06-21 17:51:08,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50122 conditions, 6482 events. 4268/6482 cut-off events. For 459005/459007 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36865 event pairs, 907 based on Foata normal form. 6/6488 useless extension candidates. Maximal degree in co-relation 49979. Up to 5995 conditions per place. [2024-06-21 17:51:08,458 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 135 changer transitions 0/437 dead transitions. [2024-06-21 17:51:08,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 437 transitions, 6394 flow [2024-06-21 17:51:08,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:51:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:51:08,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 17:51:08,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-21 17:51:08,459 INFO L175 Difference]: Start difference. First operand has 289 places, 398 transitions, 5364 flow. Second operand 9 states and 166 transitions. [2024-06-21 17:51:08,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 437 transitions, 6394 flow [2024-06-21 17:51:09,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 437 transitions, 6239 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:09,440 INFO L231 Difference]: Finished difference. Result has 294 places, 402 transitions, 5562 flow [2024-06-21 17:51:09,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5209, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5562, PETRI_PLACES=294, PETRI_TRANSITIONS=402} [2024-06-21 17:51:09,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-21 17:51:09,441 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 402 transitions, 5562 flow [2024-06-21 17:51:09,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:09,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:09,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:09,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 17:51:09,441 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:09,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1442982315, now seen corresponding path program 4 times [2024-06-21 17:51:09,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:09,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623184443] [2024-06-21 17:51:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:10,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:10,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623184443] [2024-06-21 17:51:10,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623184443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:10,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:10,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:10,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410376512] [2024-06-21 17:51:10,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:10,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:10,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:10,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:10,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:10,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:10,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 402 transitions, 5562 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:10,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:10,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:10,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:11,727 INFO L124 PetriNetUnfolderBase]: 4272/6488 cut-off events. [2024-06-21 17:51:11,727 INFO L125 PetriNetUnfolderBase]: For 453233/453235 co-relation queries the response was YES. [2024-06-21 17:51:11,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50196 conditions, 6488 events. 4272/6488 cut-off events. For 453233/453235 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36920 event pairs, 890 based on Foata normal form. 6/6494 useless extension candidates. Maximal degree in co-relation 50052. Up to 5930 conditions per place. [2024-06-21 17:51:11,820 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 148 changer transitions 0/438 dead transitions. [2024-06-21 17:51:11,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 438 transitions, 6600 flow [2024-06-21 17:51:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 17:51:11,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:51:11,821 INFO L175 Difference]: Start difference. First operand has 294 places, 402 transitions, 5562 flow. Second operand 7 states and 140 transitions. [2024-06-21 17:51:11,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 438 transitions, 6600 flow [2024-06-21 17:51:12,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 438 transitions, 6369 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:12,640 INFO L231 Difference]: Finished difference. Result has 295 places, 406 transitions, 5758 flow [2024-06-21 17:51:12,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5758, PETRI_PLACES=295, PETRI_TRANSITIONS=406} [2024-06-21 17:51:12,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-21 17:51:12,640 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 406 transitions, 5758 flow [2024-06-21 17:51:12,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:12,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:12,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:12,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 17:51:12,641 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:12,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:12,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1426330535, now seen corresponding path program 3 times [2024-06-21 17:51:12,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:12,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964039144] [2024-06-21 17:51:12,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:12,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:13,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:13,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964039144] [2024-06-21 17:51:13,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964039144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:13,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:13,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:13,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307248959] [2024-06-21 17:51:13,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:13,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:13,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:13,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:13,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:13,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 406 transitions, 5758 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:13,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:13,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:13,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:15,302 INFO L124 PetriNetUnfolderBase]: 4267/6480 cut-off events. [2024-06-21 17:51:15,302 INFO L125 PetriNetUnfolderBase]: For 434568/434568 co-relation queries the response was YES. [2024-06-21 17:51:15,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50437 conditions, 6480 events. 4267/6480 cut-off events. For 434568/434568 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36848 event pairs, 977 based on Foata normal form. 2/6482 useless extension candidates. Maximal degree in co-relation 50293. Up to 6445 conditions per place. [2024-06-21 17:51:15,377 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 401 selfloop transitions, 15 changer transitions 0/419 dead transitions. [2024-06-21 17:51:15,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 419 transitions, 6676 flow [2024-06-21 17:51:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:15,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-21 17:51:15,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 17:51:15,378 INFO L175 Difference]: Start difference. First operand has 295 places, 406 transitions, 5758 flow. Second operand 6 states and 96 transitions. [2024-06-21 17:51:15,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 419 transitions, 6676 flow [2024-06-21 17:51:16,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 419 transitions, 6375 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 17:51:16,279 INFO L231 Difference]: Finished difference. Result has 296 places, 408 transitions, 5556 flow [2024-06-21 17:51:16,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5457, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5556, PETRI_PLACES=296, PETRI_TRANSITIONS=408} [2024-06-21 17:51:16,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-21 17:51:16,280 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 408 transitions, 5556 flow [2024-06-21 17:51:16,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:16,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:16,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:16,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 17:51:16,280 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:16,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:16,280 INFO L85 PathProgramCache]: Analyzing trace with hash 296025077, now seen corresponding path program 1 times [2024-06-21 17:51:16,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:16,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583543827] [2024-06-21 17:51:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:16,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:16,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:17,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:17,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583543827] [2024-06-21 17:51:17,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583543827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:17,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:17,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:17,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16097246] [2024-06-21 17:51:17,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:17,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:17,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:17,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 408 transitions, 5556 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:17,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:17,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:17,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:18,886 INFO L124 PetriNetUnfolderBase]: 4349/6606 cut-off events. [2024-06-21 17:51:18,886 INFO L125 PetriNetUnfolderBase]: For 479621/479621 co-relation queries the response was YES. [2024-06-21 17:51:18,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51381 conditions, 6606 events. 4349/6606 cut-off events. For 479621/479621 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 37662 event pairs, 950 based on Foata normal form. 10/6616 useless extension candidates. Maximal degree in co-relation 51236. Up to 6287 conditions per place. [2024-06-21 17:51:18,978 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 402 selfloop transitions, 42 changer transitions 0/447 dead transitions. [2024-06-21 17:51:18,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 447 transitions, 6808 flow [2024-06-21 17:51:18,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:51:18,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 17:51:18,979 INFO L175 Difference]: Start difference. First operand has 296 places, 408 transitions, 5556 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:51:18,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 447 transitions, 6808 flow [2024-06-21 17:51:19,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 447 transitions, 6725 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:19,949 INFO L231 Difference]: Finished difference. Result has 300 places, 410 transitions, 5595 flow [2024-06-21 17:51:19,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5473, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5595, PETRI_PLACES=300, PETRI_TRANSITIONS=410} [2024-06-21 17:51:19,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-21 17:51:19,949 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 410 transitions, 5595 flow [2024-06-21 17:51:19,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:19,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:19,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:19,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 17:51:19,950 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:19,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:19,950 INFO L85 PathProgramCache]: Analyzing trace with hash 293346677, now seen corresponding path program 2 times [2024-06-21 17:51:19,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:19,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144155675] [2024-06-21 17:51:19,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:19,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:20,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144155675] [2024-06-21 17:51:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144155675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:20,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:20,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:20,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679707316] [2024-06-21 17:51:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:20,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:20,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:20,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 410 transitions, 5595 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:20,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:20,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:20,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:22,604 INFO L124 PetriNetUnfolderBase]: 4401/6686 cut-off events. [2024-06-21 17:51:22,604 INFO L125 PetriNetUnfolderBase]: For 505652/505652 co-relation queries the response was YES. [2024-06-21 17:51:22,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52185 conditions, 6686 events. 4401/6686 cut-off events. For 505652/505652 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 38265 event pairs, 995 based on Foata normal form. 14/6700 useless extension candidates. Maximal degree in co-relation 52039. Up to 6478 conditions per place. [2024-06-21 17:51:22,700 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 398 selfloop transitions, 41 changer transitions 0/442 dead transitions. [2024-06-21 17:51:22,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 442 transitions, 6655 flow [2024-06-21 17:51:22,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:22,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:51:22,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:51:22,701 INFO L175 Difference]: Start difference. First operand has 300 places, 410 transitions, 5595 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:51:22,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 442 transitions, 6655 flow [2024-06-21 17:51:23,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 442 transitions, 6601 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:23,691 INFO L231 Difference]: Finished difference. Result has 304 places, 411 transitions, 5648 flow [2024-06-21 17:51:23,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5648, PETRI_PLACES=304, PETRI_TRANSITIONS=411} [2024-06-21 17:51:23,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-21 17:51:23,691 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 411 transitions, 5648 flow [2024-06-21 17:51:23,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:23,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:23,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 17:51:23,692 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:23,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:23,693 INFO L85 PathProgramCache]: Analyzing trace with hash 488922751, now seen corresponding path program 3 times [2024-06-21 17:51:23,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:23,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614215093] [2024-06-21 17:51:23,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:23,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:24,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:24,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614215093] [2024-06-21 17:51:24,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614215093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:24,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:24,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:24,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925726623] [2024-06-21 17:51:24,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:24,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:24,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:24,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:24,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:24,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:24,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 411 transitions, 5648 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:24,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:24,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:24,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:26,326 INFO L124 PetriNetUnfolderBase]: 4453/6766 cut-off events. [2024-06-21 17:51:26,326 INFO L125 PetriNetUnfolderBase]: For 520081/520081 co-relation queries the response was YES. [2024-06-21 17:51:26,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53057 conditions, 6766 events. 4453/6766 cut-off events. For 520081/520081 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38849 event pairs, 1005 based on Foata normal form. 14/6780 useless extension candidates. Maximal degree in co-relation 52909. Up to 6626 conditions per place. [2024-06-21 17:51:26,417 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 406 selfloop transitions, 29 changer transitions 0/438 dead transitions. [2024-06-21 17:51:26,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 438 transitions, 6674 flow [2024-06-21 17:51:26,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:26,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 17:51:26,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:51:26,418 INFO L175 Difference]: Start difference. First operand has 304 places, 411 transitions, 5648 flow. Second operand 8 states and 136 transitions. [2024-06-21 17:51:26,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 438 transitions, 6674 flow [2024-06-21 17:51:27,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 438 transitions, 6591 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:27,552 INFO L231 Difference]: Finished difference. Result has 306 places, 412 transitions, 5650 flow [2024-06-21 17:51:27,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5565, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5650, PETRI_PLACES=306, PETRI_TRANSITIONS=412} [2024-06-21 17:51:27,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 17:51:27,553 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 412 transitions, 5650 flow [2024-06-21 17:51:27,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:27,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:27,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:27,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 17:51:27,553 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:27,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash 489107449, now seen corresponding path program 1 times [2024-06-21 17:51:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:27,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470464072] [2024-06-21 17:51:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:27,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:28,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:28,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470464072] [2024-06-21 17:51:28,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470464072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:28,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:28,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374979412] [2024-06-21 17:51:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:28,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:28,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:28,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:28,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:28,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 412 transitions, 5650 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:28,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:28,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:28,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:30,504 INFO L124 PetriNetUnfolderBase]: 4461/6778 cut-off events. [2024-06-21 17:51:30,505 INFO L125 PetriNetUnfolderBase]: For 505791/505791 co-relation queries the response was YES. [2024-06-21 17:51:30,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53299 conditions, 6778 events. 4461/6778 cut-off events. For 505791/505791 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38946 event pairs, 1027 based on Foata normal form. 2/6780 useless extension candidates. Maximal degree in co-relation 53150. Up to 6720 conditions per place. [2024-06-21 17:51:30,584 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 401 selfloop transitions, 27 changer transitions 0/431 dead transitions. [2024-06-21 17:51:30,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 431 transitions, 6588 flow [2024-06-21 17:51:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:51:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:51:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 17:51:30,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-21 17:51:30,585 INFO L175 Difference]: Start difference. First operand has 306 places, 412 transitions, 5650 flow. Second operand 8 states and 127 transitions. [2024-06-21 17:51:30,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 431 transitions, 6588 flow [2024-06-21 17:51:31,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 431 transitions, 6527 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:31,708 INFO L231 Difference]: Finished difference. Result has 308 places, 414 transitions, 5690 flow [2024-06-21 17:51:31,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5690, PETRI_PLACES=308, PETRI_TRANSITIONS=414} [2024-06-21 17:51:31,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-21 17:51:31,709 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 414 transitions, 5690 flow [2024-06-21 17:51:31,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:31,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:31,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 17:51:31,710 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:31,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1437249547, now seen corresponding path program 2 times [2024-06-21 17:51:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:31,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819279978] [2024-06-21 17:51:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:31,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:32,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:32,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819279978] [2024-06-21 17:51:32,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819279978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:32,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:32,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:32,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401872675] [2024-06-21 17:51:32,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:32,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:32,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:32,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:32,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:32,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 414 transitions, 5690 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:32,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:32,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:32,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:34,389 INFO L124 PetriNetUnfolderBase]: 4469/6790 cut-off events. [2024-06-21 17:51:34,389 INFO L125 PetriNetUnfolderBase]: For 518677/518677 co-relation queries the response was YES. [2024-06-21 17:51:34,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53564 conditions, 6790 events. 4469/6790 cut-off events. For 518677/518677 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39025 event pairs, 1023 based on Foata normal form. 2/6792 useless extension candidates. Maximal degree in co-relation 53414. Up to 6726 conditions per place. [2024-06-21 17:51:34,487 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 400 selfloop transitions, 27 changer transitions 0/430 dead transitions. [2024-06-21 17:51:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 430 transitions, 6622 flow [2024-06-21 17:51:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 17:51:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-21 17:51:34,489 INFO L175 Difference]: Start difference. First operand has 308 places, 414 transitions, 5690 flow. Second operand 6 states and 102 transitions. [2024-06-21 17:51:34,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 430 transitions, 6622 flow [2024-06-21 17:51:35,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 430 transitions, 6537 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:35,678 INFO L231 Difference]: Finished difference. Result has 308 places, 416 transitions, 5713 flow [2024-06-21 17:51:35,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5713, PETRI_PLACES=308, PETRI_TRANSITIONS=416} [2024-06-21 17:51:35,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-21 17:51:35,678 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 416 transitions, 5713 flow [2024-06-21 17:51:35,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:35,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:35,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:35,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 17:51:35,679 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 17:51:35,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1665335395, now seen corresponding path program 4 times [2024-06-21 17:51:35,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:35,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892661180] [2024-06-21 17:51:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:35,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:36,614 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 17:51:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:36,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892661180] [2024-06-21 17:51:36,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892661180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:36,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:36,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:36,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854201175] [2024-06-21 17:51:36,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:36,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:36,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:36,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:36,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 416 transitions, 5713 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:36,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:36,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:36,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:38,300 INFO L124 PetriNetUnfolderBase]: 4436/6743 cut-off events. [2024-06-21 17:51:38,300 INFO L125 PetriNetUnfolderBase]: For 526257/526257 co-relation queries the response was YES. [2024-06-21 17:51:38,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52491 conditions, 6743 events. 4436/6743 cut-off events. For 526257/526257 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38669 event pairs, 963 based on Foata normal form. 14/6757 useless extension candidates. Maximal degree in co-relation 52340. Up to 6479 conditions per place. [2024-06-21 17:51:38,395 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 403 selfloop transitions, 40 changer transitions 0/446 dead transitions. [2024-06-21 17:51:38,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 446 transitions, 6745 flow [2024-06-21 17:51:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:51:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:51:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 17:51:38,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 17:51:38,396 INFO L175 Difference]: Start difference. First operand has 308 places, 416 transitions, 5713 flow. Second operand 7 states and 130 transitions. [2024-06-21 17:51:38,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 446 transitions, 6745 flow [2024-06-21 17:51:39,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 446 transitions, 6655 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:39,559 INFO L231 Difference]: Finished difference. Result has 311 places, 416 transitions, 5714 flow [2024-06-21 17:51:39,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5714, PETRI_PLACES=311, PETRI_TRANSITIONS=416} [2024-06-21 17:51:39,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 17:51:39,560 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 416 transitions, 5714 flow [2024-06-21 17:51:39,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:39,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:39,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:39,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 17:51:39,561 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:39,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:39,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1428678667, now seen corresponding path program 3 times [2024-06-21 17:51:39,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:39,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262713838] [2024-06-21 17:51:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:39,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:40,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:40,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262713838] [2024-06-21 17:51:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262713838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:40,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:51:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158896393] [2024-06-21 17:51:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:40,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:51:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:51:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:51:40,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:40,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 416 transitions, 5714 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:40,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:40,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:40,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:42,115 INFO L124 PetriNetUnfolderBase]: 4431/6737 cut-off events. [2024-06-21 17:51:42,115 INFO L125 PetriNetUnfolderBase]: For 491365/491367 co-relation queries the response was YES. [2024-06-21 17:51:42,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52308 conditions, 6737 events. 4431/6737 cut-off events. For 491365/491367 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38689 event pairs, 998 based on Foata normal form. 4/6741 useless extension candidates. Maximal degree in co-relation 52156. Up to 6658 conditions per place. [2024-06-21 17:51:42,208 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 400 selfloop transitions, 27 changer transitions 0/430 dead transitions. [2024-06-21 17:51:42,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 430 transitions, 6640 flow [2024-06-21 17:51:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:51:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:51:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 17:51:42,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-21 17:51:42,210 INFO L175 Difference]: Start difference. First operand has 311 places, 416 transitions, 5714 flow. Second operand 6 states and 98 transitions. [2024-06-21 17:51:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 430 transitions, 6640 flow [2024-06-21 17:51:43,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 430 transitions, 6553 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 17:51:43,353 INFO L231 Difference]: Finished difference. Result has 311 places, 418 transitions, 5732 flow [2024-06-21 17:51:43,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5732, PETRI_PLACES=311, PETRI_TRANSITIONS=418} [2024-06-21 17:51:43,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-21 17:51:43,354 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 418 transitions, 5732 flow [2024-06-21 17:51:43,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:43,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:43,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:43,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 17:51:43,354 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:43,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2084573581, now seen corresponding path program 1 times [2024-06-21 17:51:43,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:43,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154037799] [2024-06-21 17:51:43,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:43,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:44,386 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 17:51:44,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:44,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154037799] [2024-06-21 17:51:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154037799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:44,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368987885] [2024-06-21 17:51:44,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:44,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:44,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:44,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:44,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:44,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:44,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 418 transitions, 5732 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:44,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:44,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:44,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:46,268 INFO L124 PetriNetUnfolderBase]: 4621/7027 cut-off events. [2024-06-21 17:51:46,268 INFO L125 PetriNetUnfolderBase]: For 581821/581823 co-relation queries the response was YES. [2024-06-21 17:51:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55799 conditions, 7027 events. 4621/7027 cut-off events. For 581821/581823 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40491 event pairs, 824 based on Foata normal form. 18/7045 useless extension candidates. Maximal degree in co-relation 55646. Up to 6086 conditions per place. [2024-06-21 17:51:46,354 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 330 selfloop transitions, 141 changer transitions 0/474 dead transitions. [2024-06-21 17:51:46,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 474 transitions, 7171 flow [2024-06-21 17:51:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:51:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:51:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 17:51:46,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-21 17:51:46,355 INFO L175 Difference]: Start difference. First operand has 311 places, 418 transitions, 5732 flow. Second operand 10 states and 189 transitions. [2024-06-21 17:51:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 474 transitions, 7171 flow [2024-06-21 17:51:47,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 474 transitions, 7082 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:47,726 INFO L231 Difference]: Finished difference. Result has 318 places, 425 transitions, 6083 flow [2024-06-21 17:51:47,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5643, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6083, PETRI_PLACES=318, PETRI_TRANSITIONS=425} [2024-06-21 17:51:47,726 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-21 17:51:47,726 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 425 transitions, 6083 flow [2024-06-21 17:51:47,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:47,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:47,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:47,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 17:51:47,727 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:51:47,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash 2091982891, now seen corresponding path program 2 times [2024-06-21 17:51:47,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:47,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972734658] [2024-06-21 17:51:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:47,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972734658] [2024-06-21 17:51:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972734658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:48,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:48,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:48,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604384981] [2024-06-21 17:51:48,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:48,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:48,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:48,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:48,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:48,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:48,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 425 transitions, 6083 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:48,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:48,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:48,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:50,596 INFO L124 PetriNetUnfolderBase]: 4841/7359 cut-off events. [2024-06-21 17:51:50,597 INFO L125 PetriNetUnfolderBase]: For 658018/658020 co-relation queries the response was YES. [2024-06-21 17:51:50,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60625 conditions, 7359 events. 4841/7359 cut-off events. For 658018/658020 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 42841 event pairs, 1009 based on Foata normal form. 18/7377 useless extension candidates. Maximal degree in co-relation 60470. Up to 6545 conditions per place. [2024-06-21 17:51:50,699 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 311 selfloop transitions, 172 changer transitions 0/486 dead transitions. [2024-06-21 17:51:50,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 486 transitions, 7631 flow [2024-06-21 17:51:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:51:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:51:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 17:51:50,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2024-06-21 17:51:50,700 INFO L175 Difference]: Start difference. First operand has 318 places, 425 transitions, 6083 flow. Second operand 10 states and 188 transitions. [2024-06-21 17:51:50,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 486 transitions, 7631 flow [2024-06-21 17:51:52,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 486 transitions, 7410 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:51:52,348 INFO L231 Difference]: Finished difference. Result has 324 places, 439 transitions, 6466 flow [2024-06-21 17:51:52,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5869, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6466, PETRI_PLACES=324, PETRI_TRANSITIONS=439} [2024-06-21 17:51:52,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-21 17:51:52,349 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 439 transitions, 6466 flow [2024-06-21 17:51:52,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:52,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:52,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:52,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 17:51:52,349 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 17:51:52,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:52,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2091992191, now seen corresponding path program 3 times [2024-06-21 17:51:52,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:52,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589133115] [2024-06-21 17:51:52,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:52,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:53,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:53,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589133115] [2024-06-21 17:51:53,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589133115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:53,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:53,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:53,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493777195] [2024-06-21 17:51:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:53,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:53,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:53,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:53,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:53,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:53,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 439 transitions, 6466 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:53,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:53,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:53,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:51:55,154 INFO L124 PetriNetUnfolderBase]: 4883/7429 cut-off events. [2024-06-21 17:51:55,154 INFO L125 PetriNetUnfolderBase]: For 687834/687836 co-relation queries the response was YES. [2024-06-21 17:51:55,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60587 conditions, 7429 events. 4883/7429 cut-off events. For 687834/687836 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 43269 event pairs, 1025 based on Foata normal form. 42/7471 useless extension candidates. Maximal degree in co-relation 60429. Up to 6748 conditions per place. [2024-06-21 17:51:55,261 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 338 selfloop transitions, 147 changer transitions 0/488 dead transitions. [2024-06-21 17:51:55,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 488 transitions, 7715 flow [2024-06-21 17:51:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 17:51:55,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 17:51:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 211 transitions. [2024-06-21 17:51:55,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4395833333333333 [2024-06-21 17:51:55,262 INFO L175 Difference]: Start difference. First operand has 324 places, 439 transitions, 6466 flow. Second operand 12 states and 211 transitions. [2024-06-21 17:51:55,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 488 transitions, 7715 flow [2024-06-21 17:51:57,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 488 transitions, 7508 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 17:51:57,277 INFO L231 Difference]: Finished difference. Result has 332 places, 444 transitions, 6700 flow [2024-06-21 17:51:57,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6259, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6700, PETRI_PLACES=332, PETRI_TRANSITIONS=444} [2024-06-21 17:51:57,277 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-21 17:51:57,277 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 444 transitions, 6700 flow [2024-06-21 17:51:57,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:57,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:51:57,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:51:57,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 17:51:57,278 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 17:51:57,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:51:57,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1944696435, now seen corresponding path program 4 times [2024-06-21 17:51:57,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:51:57,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392087904] [2024-06-21 17:51:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:51:57,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:51:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:51:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:51:58,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:51:58,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392087904] [2024-06-21 17:51:58,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392087904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:51:58,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:51:58,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:51:58,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549851528] [2024-06-21 17:51:58,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:51:58,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:51:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:51:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:51:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:51:58,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:51:58,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 444 transitions, 6700 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:51:58,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:51:58,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:51:58,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:00,280 INFO L124 PetriNetUnfolderBase]: 5027/7653 cut-off events. [2024-06-21 17:52:00,280 INFO L125 PetriNetUnfolderBase]: For 645360/645362 co-relation queries the response was YES. [2024-06-21 17:52:00,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62992 conditions, 7653 events. 5027/7653 cut-off events. For 645360/645362 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45010 event pairs, 1025 based on Foata normal form. 18/7671 useless extension candidates. Maximal degree in co-relation 62832. Up to 7014 conditions per place. [2024-06-21 17:52:00,389 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 371 selfloop transitions, 114 changer transitions 0/488 dead transitions. [2024-06-21 17:52:00,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 488 transitions, 7968 flow [2024-06-21 17:52:00,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:52:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:52:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 17:52:00,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-21 17:52:00,390 INFO L175 Difference]: Start difference. First operand has 332 places, 444 transitions, 6700 flow. Second operand 10 states and 179 transitions. [2024-06-21 17:52:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 488 transitions, 7968 flow [2024-06-21 17:52:01,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 488 transitions, 7650 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-21 17:52:01,827 INFO L231 Difference]: Finished difference. Result has 333 places, 449 transitions, 6759 flow [2024-06-21 17:52:01,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6384, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6759, PETRI_PLACES=333, PETRI_TRANSITIONS=449} [2024-06-21 17:52:01,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-21 17:52:01,828 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 449 transitions, 6759 flow [2024-06-21 17:52:01,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:01,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:01,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:01,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 17:52:01,828 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:01,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:01,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1452170415, now seen corresponding path program 1 times [2024-06-21 17:52:01,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:01,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145598879] [2024-06-21 17:52:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:02,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145598879] [2024-06-21 17:52:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145598879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:02,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:02,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:02,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687633177] [2024-06-21 17:52:02,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:02,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:02,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:02,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:02,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:02,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:02,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 449 transitions, 6759 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:02,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:02,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:02,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:04,330 INFO L124 PetriNetUnfolderBase]: 5153/7828 cut-off events. [2024-06-21 17:52:04,330 INFO L125 PetriNetUnfolderBase]: For 671100/671102 co-relation queries the response was YES. [2024-06-21 17:52:04,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65405 conditions, 7828 events. 5153/7828 cut-off events. For 671100/671102 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 46119 event pairs, 1036 based on Foata normal form. 8/7836 useless extension candidates. Maximal degree in co-relation 65243. Up to 6559 conditions per place. [2024-06-21 17:52:04,428 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 336 selfloop transitions, 159 changer transitions 0/498 dead transitions. [2024-06-21 17:52:04,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 498 transitions, 8413 flow [2024-06-21 17:52:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:04,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 17:52:04,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-21 17:52:04,429 INFO L175 Difference]: Start difference. First operand has 333 places, 449 transitions, 6759 flow. Second operand 8 states and 157 transitions. [2024-06-21 17:52:04,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 498 transitions, 8413 flow [2024-06-21 17:52:06,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 498 transitions, 8160 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:06,347 INFO L231 Difference]: Finished difference. Result has 335 places, 458 transitions, 7024 flow [2024-06-21 17:52:06,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6506, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7024, PETRI_PLACES=335, PETRI_TRANSITIONS=458} [2024-06-21 17:52:06,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-21 17:52:06,348 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 458 transitions, 7024 flow [2024-06-21 17:52:06,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:06,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:06,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:06,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 17:52:06,349 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:06,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:06,349 INFO L85 PathProgramCache]: Analyzing trace with hash -508526537, now seen corresponding path program 2 times [2024-06-21 17:52:06,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:06,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986308964] [2024-06-21 17:52:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:06,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:07,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986308964] [2024-06-21 17:52:07,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986308964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:07,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:07,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098820227] [2024-06-21 17:52:07,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:07,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:07,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:07,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 458 transitions, 7024 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:07,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:07,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:07,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:08,823 INFO L124 PetriNetUnfolderBase]: 5279/8002 cut-off events. [2024-06-21 17:52:08,823 INFO L125 PetriNetUnfolderBase]: For 725342/725344 co-relation queries the response was YES. [2024-06-21 17:52:08,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68195 conditions, 8002 events. 5279/8002 cut-off events. For 725342/725344 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 47101 event pairs, 1035 based on Foata normal form. 8/8010 useless extension candidates. Maximal degree in co-relation 68032. Up to 6647 conditions per place. [2024-06-21 17:52:08,941 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 353 selfloop transitions, 149 changer transitions 0/505 dead transitions. [2024-06-21 17:52:08,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 505 transitions, 8890 flow [2024-06-21 17:52:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:08,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 17:52:08,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-06-21 17:52:08,942 INFO L175 Difference]: Start difference. First operand has 335 places, 458 transitions, 7024 flow. Second operand 8 states and 154 transitions. [2024-06-21 17:52:08,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 505 transitions, 8890 flow [2024-06-21 17:52:10,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 505 transitions, 8433 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:10,880 INFO L231 Difference]: Finished difference. Result has 337 places, 467 transitions, 7111 flow [2024-06-21 17:52:10,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7111, PETRI_PLACES=337, PETRI_TRANSITIONS=467} [2024-06-21 17:52:10,880 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 17:52:10,880 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 467 transitions, 7111 flow [2024-06-21 17:52:10,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:10,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:10,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:10,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 17:52:10,881 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:10,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:10,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1457831325, now seen corresponding path program 3 times [2024-06-21 17:52:10,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103377124] [2024-06-21 17:52:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103377124] [2024-06-21 17:52:11,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103377124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:11,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:11,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892758215] [2024-06-21 17:52:11,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:11,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:11,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:11,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 467 transitions, 7111 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:11,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:11,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:11,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:13,223 INFO L124 PetriNetUnfolderBase]: 5261/7978 cut-off events. [2024-06-21 17:52:13,224 INFO L125 PetriNetUnfolderBase]: For 719790/719792 co-relation queries the response was YES. [2024-06-21 17:52:13,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67319 conditions, 7978 events. 5261/7978 cut-off events. For 719790/719792 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 47007 event pairs, 1040 based on Foata normal form. 8/7986 useless extension candidates. Maximal degree in co-relation 67156. Up to 6636 conditions per place. [2024-06-21 17:52:13,344 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 354 selfloop transitions, 144 changer transitions 0/501 dead transitions. [2024-06-21 17:52:13,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 501 transitions, 8569 flow [2024-06-21 17:52:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:13,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 17:52:13,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 17:52:13,346 INFO L175 Difference]: Start difference. First operand has 337 places, 467 transitions, 7111 flow. Second operand 8 states and 150 transitions. [2024-06-21 17:52:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 501 transitions, 8569 flow [2024-06-21 17:52:15,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 501 transitions, 8283 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 17:52:15,237 INFO L231 Difference]: Finished difference. Result has 341 places, 467 transitions, 7120 flow [2024-06-21 17:52:15,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6825, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7120, PETRI_PLACES=341, PETRI_TRANSITIONS=467} [2024-06-21 17:52:15,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-21 17:52:15,237 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 467 transitions, 7120 flow [2024-06-21 17:52:15,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:15,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:15,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:15,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 17:52:15,238 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:15,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash -513768947, now seen corresponding path program 4 times [2024-06-21 17:52:15,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:15,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517026996] [2024-06-21 17:52:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517026996] [2024-06-21 17:52:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517026996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:15,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208684060] [2024-06-21 17:52:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:15,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:15,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:15,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 467 transitions, 7120 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:15,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:15,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:15,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:17,953 INFO L124 PetriNetUnfolderBase]: 5291/8019 cut-off events. [2024-06-21 17:52:17,953 INFO L125 PetriNetUnfolderBase]: For 736897/736899 co-relation queries the response was YES. [2024-06-21 17:52:18,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67515 conditions, 8019 events. 5291/8019 cut-off events. For 736897/736899 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 47195 event pairs, 1134 based on Foata normal form. 8/8027 useless extension candidates. Maximal degree in co-relation 67351. Up to 7652 conditions per place. [2024-06-21 17:52:18,062 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 399 selfloop transitions, 97 changer transitions 0/499 dead transitions. [2024-06-21 17:52:18,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 499 transitions, 8256 flow [2024-06-21 17:52:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 17:52:18,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45625 [2024-06-21 17:52:18,064 INFO L175 Difference]: Start difference. First operand has 341 places, 467 transitions, 7120 flow. Second operand 8 states and 146 transitions. [2024-06-21 17:52:18,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 499 transitions, 8256 flow [2024-06-21 17:52:19,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 499 transitions, 8041 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:19,851 INFO L231 Difference]: Finished difference. Result has 344 places, 470 transitions, 7162 flow [2024-06-21 17:52:19,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6911, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7162, PETRI_PLACES=344, PETRI_TRANSITIONS=470} [2024-06-21 17:52:19,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-21 17:52:19,852 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 470 transitions, 7162 flow [2024-06-21 17:52:19,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:19,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:19,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:19,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 17:52:19,853 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:19,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:19,853 INFO L85 PathProgramCache]: Analyzing trace with hash -504508937, now seen corresponding path program 5 times [2024-06-21 17:52:19,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:19,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806213268] [2024-06-21 17:52:19,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:19,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:20,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:20,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806213268] [2024-06-21 17:52:20,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806213268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:20,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4812526] [2024-06-21 17:52:20,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:20,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:20,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:20,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:20,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 470 transitions, 7162 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:20,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:20,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:20,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:22,280 INFO L124 PetriNetUnfolderBase]: 5273/7995 cut-off events. [2024-06-21 17:52:22,280 INFO L125 PetriNetUnfolderBase]: For 735594/735596 co-relation queries the response was YES. [2024-06-21 17:52:22,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66514 conditions, 7995 events. 5273/7995 cut-off events. For 735594/735596 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 47016 event pairs, 1137 based on Foata normal form. 8/8003 useless extension candidates. Maximal degree in co-relation 66350. Up to 7399 conditions per place. [2024-06-21 17:52:22,399 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 405 selfloop transitions, 89 changer transitions 0/497 dead transitions. [2024-06-21 17:52:22,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 497 transitions, 8416 flow [2024-06-21 17:52:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 17:52:22,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-21 17:52:22,400 INFO L175 Difference]: Start difference. First operand has 344 places, 470 transitions, 7162 flow. Second operand 8 states and 142 transitions. [2024-06-21 17:52:22,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 497 transitions, 8416 flow [2024-06-21 17:52:24,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 497 transitions, 8203 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 17:52:24,652 INFO L231 Difference]: Finished difference. Result has 346 places, 470 transitions, 7135 flow [2024-06-21 17:52:24,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6949, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7135, PETRI_PLACES=346, PETRI_TRANSITIONS=470} [2024-06-21 17:52:24,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 17:52:24,652 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 470 transitions, 7135 flow [2024-06-21 17:52:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:24,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:24,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 17:52:24,653 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:24,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:24,653 INFO L85 PathProgramCache]: Analyzing trace with hash -504514517, now seen corresponding path program 6 times [2024-06-21 17:52:24,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:24,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918310625] [2024-06-21 17:52:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:25,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:25,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918310625] [2024-06-21 17:52:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918310625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:25,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:25,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:25,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566902090] [2024-06-21 17:52:25,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:25,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:25,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:25,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:25,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 470 transitions, 7135 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:25,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:25,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:25,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:27,205 INFO L124 PetriNetUnfolderBase]: 5255/7971 cut-off events. [2024-06-21 17:52:27,205 INFO L125 PetriNetUnfolderBase]: For 732410/732412 co-relation queries the response was YES. [2024-06-21 17:52:27,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66094 conditions, 7971 events. 5255/7971 cut-off events. For 732410/732412 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46911 event pairs, 1148 based on Foata normal form. 8/7979 useless extension candidates. Maximal degree in co-relation 65929. Up to 7388 conditions per place. [2024-06-21 17:52:27,314 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 399 selfloop transitions, 100 changer transitions 0/502 dead transitions. [2024-06-21 17:52:27,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 502 transitions, 8269 flow [2024-06-21 17:52:27,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:52:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:52:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 17:52:27,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-21 17:52:27,316 INFO L175 Difference]: Start difference. First operand has 346 places, 470 transitions, 7135 flow. Second operand 10 states and 171 transitions. [2024-06-21 17:52:27,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 502 transitions, 8269 flow [2024-06-21 17:52:29,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 502 transitions, 8077 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:29,184 INFO L231 Difference]: Finished difference. Result has 351 places, 470 transitions, 7151 flow [2024-06-21 17:52:29,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6943, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7151, PETRI_PLACES=351, PETRI_TRANSITIONS=470} [2024-06-21 17:52:29,184 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-21 17:52:29,184 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 470 transitions, 7151 flow [2024-06-21 17:52:29,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:29,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:29,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:29,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 17:52:29,185 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:52:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1641123797, now seen corresponding path program 5 times [2024-06-21 17:52:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:29,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894683004] [2024-06-21 17:52:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:30,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894683004] [2024-06-21 17:52:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894683004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:52:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743550254] [2024-06-21 17:52:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:30,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:52:30,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:52:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:52:30,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:30,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 470 transitions, 7151 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:30,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:30,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:30,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:32,288 INFO L124 PetriNetUnfolderBase]: 5533/8397 cut-off events. [2024-06-21 17:52:32,288 INFO L125 PetriNetUnfolderBase]: For 858979/858981 co-relation queries the response was YES. [2024-06-21 17:52:32,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71509 conditions, 8397 events. 5533/8397 cut-off events. For 858979/858981 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 49857 event pairs, 1178 based on Foata normal form. 18/8415 useless extension candidates. Maximal degree in co-relation 71343. Up to 7700 conditions per place. [2024-06-21 17:52:32,423 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 411 selfloop transitions, 98 changer transitions 0/512 dead transitions. [2024-06-21 17:52:32,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 512 transitions, 8710 flow [2024-06-21 17:52:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:52:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:52:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 17:52:32,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-21 17:52:32,425 INFO L175 Difference]: Start difference. First operand has 351 places, 470 transitions, 7151 flow. Second operand 10 states and 174 transitions. [2024-06-21 17:52:32,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 512 transitions, 8710 flow [2024-06-21 17:52:34,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 512 transitions, 8458 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-21 17:52:34,385 INFO L231 Difference]: Finished difference. Result has 352 places, 477 transitions, 7319 flow [2024-06-21 17:52:34,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7319, PETRI_PLACES=352, PETRI_TRANSITIONS=477} [2024-06-21 17:52:34,385 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 17:52:34,386 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 477 transitions, 7319 flow [2024-06-21 17:52:34,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:34,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:34,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:34,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 17:52:34,386 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 17:52:34,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:34,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1629672893, now seen corresponding path program 1 times [2024-06-21 17:52:34,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:34,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130939514] [2024-06-21 17:52:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:34,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:35,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:35,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130939514] [2024-06-21 17:52:35,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130939514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:35,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:35,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:52:35,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226607265] [2024-06-21 17:52:35,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:35,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:52:35,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:52:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:52:35,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:35,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 477 transitions, 7319 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:35,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:35,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:35,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:37,632 INFO L124 PetriNetUnfolderBase]: 5756/8738 cut-off events. [2024-06-21 17:52:37,632 INFO L125 PetriNetUnfolderBase]: For 888002/888004 co-relation queries the response was YES. [2024-06-21 17:52:37,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74375 conditions, 8738 events. 5756/8738 cut-off events. For 888002/888004 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 52288 event pairs, 1206 based on Foata normal form. 18/8756 useless extension candidates. Maximal degree in co-relation 74207. Up to 7779 conditions per place. [2024-06-21 17:52:37,768 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 433 selfloop transitions, 109 changer transitions 0/545 dead transitions. [2024-06-21 17:52:37,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 545 transitions, 9211 flow [2024-06-21 17:52:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:52:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:52:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 17:52:37,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-21 17:52:37,769 INFO L175 Difference]: Start difference. First operand has 352 places, 477 transitions, 7319 flow. Second operand 10 states and 172 transitions. [2024-06-21 17:52:37,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 545 transitions, 9211 flow [2024-06-21 17:52:39,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 545 transitions, 9058 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:39,974 INFO L231 Difference]: Finished difference. Result has 362 places, 506 transitions, 7944 flow [2024-06-21 17:52:39,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7178, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7944, PETRI_PLACES=362, PETRI_TRANSITIONS=506} [2024-06-21 17:52:39,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-21 17:52:39,975 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 506 transitions, 7944 flow [2024-06-21 17:52:39,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:39,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:39,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 17:52:39,975 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 17:52:39,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 687793467, now seen corresponding path program 6 times [2024-06-21 17:52:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:39,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216683284] [2024-06-21 17:52:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:40,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:40,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216683284] [2024-06-21 17:52:40,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216683284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:40,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:40,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:52:40,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101092402] [2024-06-21 17:52:40,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:40,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:52:40,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:52:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:52:41,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:41,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 506 transitions, 7944 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:41,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:41,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:43,191 INFO L124 PetriNetUnfolderBase]: 5726/8696 cut-off events. [2024-06-21 17:52:43,192 INFO L125 PetriNetUnfolderBase]: For 853794/853796 co-relation queries the response was YES. [2024-06-21 17:52:43,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73704 conditions, 8696 events. 5726/8696 cut-off events. For 853794/853796 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 52040 event pairs, 1209 based on Foata normal form. 22/8718 useless extension candidates. Maximal degree in co-relation 73529. Up to 8217 conditions per place. [2024-06-21 17:52:43,330 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 439 selfloop transitions, 98 changer transitions 0/540 dead transitions. [2024-06-21 17:52:43,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 540 transitions, 9224 flow [2024-06-21 17:52:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:52:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:52:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 185 transitions. [2024-06-21 17:52:43,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 17:52:43,331 INFO L175 Difference]: Start difference. First operand has 362 places, 506 transitions, 7944 flow. Second operand 11 states and 185 transitions. [2024-06-21 17:52:43,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 540 transitions, 9224 flow [2024-06-21 17:52:45,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 540 transitions, 9172 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-21 17:52:45,869 INFO L231 Difference]: Finished difference. Result has 372 places, 509 transitions, 8174 flow [2024-06-21 17:52:45,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7892, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8174, PETRI_PLACES=372, PETRI_TRANSITIONS=509} [2024-06-21 17:52:45,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-21 17:52:45,870 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 509 transitions, 8174 flow [2024-06-21 17:52:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:45,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:45,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:45,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 17:52:45,870 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 17:52:45,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1198840492, now seen corresponding path program 1 times [2024-06-21 17:52:45,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:45,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2447101] [2024-06-21 17:52:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:46,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:46,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2447101] [2024-06-21 17:52:46,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2447101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:46,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:52:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624987249] [2024-06-21 17:52:46,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:46,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:52:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:52:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:52:46,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:46,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 509 transitions, 8174 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:46,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:46,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:46,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:48,910 INFO L124 PetriNetUnfolderBase]: 5773/8760 cut-off events. [2024-06-21 17:52:48,910 INFO L125 PetriNetUnfolderBase]: For 832321/832321 co-relation queries the response was YES. [2024-06-21 17:52:49,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75149 conditions, 8760 events. 5773/8760 cut-off events. For 832321/832321 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 52567 event pairs, 1284 based on Foata normal form. 3/8763 useless extension candidates. Maximal degree in co-relation 74971. Up to 8433 conditions per place. [2024-06-21 17:52:49,039 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 476 selfloop transitions, 66 changer transitions 0/545 dead transitions. [2024-06-21 17:52:49,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 545 transitions, 9718 flow [2024-06-21 17:52:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 17:52:49,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 17:52:49,042 INFO L175 Difference]: Start difference. First operand has 372 places, 509 transitions, 8174 flow. Second operand 8 states and 144 transitions. [2024-06-21 17:52:49,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 545 transitions, 9718 flow [2024-06-21 17:52:51,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 545 transitions, 9504 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 17:52:51,116 INFO L231 Difference]: Finished difference. Result has 371 places, 515 transitions, 8268 flow [2024-06-21 17:52:51,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7960, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8268, PETRI_PLACES=371, PETRI_TRANSITIONS=515} [2024-06-21 17:52:51,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-21 17:52:51,117 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 515 transitions, 8268 flow [2024-06-21 17:52:51,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:51,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:51,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:51,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 17:52:51,117 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 17:52:51,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1389023724, now seen corresponding path program 2 times [2024-06-21 17:52:51,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:51,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223300368] [2024-06-21 17:52:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:51,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:51,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223300368] [2024-06-21 17:52:51,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223300368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:51,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:52:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136298231] [2024-06-21 17:52:51,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:51,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:52:51,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:51,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:52:51,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:52:51,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:51,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 515 transitions, 8268 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:51,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:51,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:51,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:54,242 INFO L124 PetriNetUnfolderBase]: 5798/8795 cut-off events. [2024-06-21 17:52:54,242 INFO L125 PetriNetUnfolderBase]: For 860718/860718 co-relation queries the response was YES. [2024-06-21 17:52:54,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76004 conditions, 8795 events. 5798/8795 cut-off events. For 860718/860718 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 52748 event pairs, 1320 based on Foata normal form. 5/8800 useless extension candidates. Maximal degree in co-relation 75825. Up to 8602 conditions per place. [2024-06-21 17:52:54,362 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 491 selfloop transitions, 50 changer transitions 0/544 dead transitions. [2024-06-21 17:52:54,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 544 transitions, 9556 flow [2024-06-21 17:52:54,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:52:54,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:52:54,363 INFO L175 Difference]: Start difference. First operand has 371 places, 515 transitions, 8268 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:52:54,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 544 transitions, 9556 flow [2024-06-21 17:52:56,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 544 transitions, 9398 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 17:52:56,679 INFO L231 Difference]: Finished difference. Result has 374 places, 518 transitions, 8312 flow [2024-06-21 17:52:56,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8126, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8312, PETRI_PLACES=374, PETRI_TRANSITIONS=518} [2024-06-21 17:52:56,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-21 17:52:56,680 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 518 transitions, 8312 flow [2024-06-21 17:52:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:56,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:52:56,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:52:56,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 17:52:56,680 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 17:52:56,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:52:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1657160611, now seen corresponding path program 7 times [2024-06-21 17:52:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:52:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037624830] [2024-06-21 17:52:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:52:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:52:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:52:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:52:57,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:52:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037624830] [2024-06-21 17:52:57,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037624830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:52:57,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:52:57,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:52:57,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610024573] [2024-06-21 17:52:57,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:52:57,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:52:57,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:52:57,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:52:57,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:52:57,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:52:57,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 518 transitions, 8312 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:52:57,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:52:57,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:52:57,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:52:59,316 INFO L124 PetriNetUnfolderBase]: 5828/8838 cut-off events. [2024-06-21 17:52:59,316 INFO L125 PetriNetUnfolderBase]: For 862287/862289 co-relation queries the response was YES. [2024-06-21 17:52:59,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76290 conditions, 8838 events. 5828/8838 cut-off events. For 862287/862289 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 53067 event pairs, 1310 based on Foata normal form. 8/8846 useless extension candidates. Maximal degree in co-relation 76110. Up to 8520 conditions per place. [2024-06-21 17:52:59,454 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 498 selfloop transitions, 50 changer transitions 0/551 dead transitions. [2024-06-21 17:52:59,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 551 transitions, 9782 flow [2024-06-21 17:52:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:52:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:52:59,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 17:52:59,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-21 17:52:59,455 INFO L175 Difference]: Start difference. First operand has 374 places, 518 transitions, 8312 flow. Second operand 8 states and 141 transitions. [2024-06-21 17:52:59,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 551 transitions, 9782 flow [2024-06-21 17:53:02,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 551 transitions, 9632 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:02,012 INFO L231 Difference]: Finished difference. Result has 375 places, 521 transitions, 8342 flow [2024-06-21 17:53:02,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8164, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8342, PETRI_PLACES=375, PETRI_TRANSITIONS=521} [2024-06-21 17:53:02,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 17:53:02,013 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 521 transitions, 8342 flow [2024-06-21 17:53:02,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:02,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:02,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:02,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 17:53:02,013 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 17:53:02,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:02,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1455251009, now seen corresponding path program 8 times [2024-06-21 17:53:02,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:02,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666647675] [2024-06-21 17:53:02,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:02,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:02,633 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 17:53:02,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:02,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666647675] [2024-06-21 17:53:02,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666647675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:02,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:02,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:02,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296817808] [2024-06-21 17:53:02,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:02,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:02,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:02,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:02,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 521 transitions, 8342 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:02,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:02,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:02,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:04,772 INFO L124 PetriNetUnfolderBase]: 5858/8880 cut-off events. [2024-06-21 17:53:04,773 INFO L125 PetriNetUnfolderBase]: For 866616/866618 co-relation queries the response was YES. [2024-06-21 17:53:04,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76568 conditions, 8880 events. 5858/8880 cut-off events. For 866616/866618 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 53322 event pairs, 1337 based on Foata normal form. 8/8888 useless extension candidates. Maximal degree in co-relation 76388. Up to 8542 conditions per place. [2024-06-21 17:53:04,905 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 498 selfloop transitions, 50 changer transitions 0/551 dead transitions. [2024-06-21 17:53:04,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 551 transitions, 9810 flow [2024-06-21 17:53:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 17:53:04,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-21 17:53:04,907 INFO L175 Difference]: Start difference. First operand has 375 places, 521 transitions, 8342 flow. Second operand 8 states and 139 transitions. [2024-06-21 17:53:04,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 551 transitions, 9810 flow [2024-06-21 17:53:07,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 551 transitions, 9381 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:07,586 INFO L231 Difference]: Finished difference. Result has 375 places, 524 transitions, 8097 flow [2024-06-21 17:53:07,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7935, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8097, PETRI_PLACES=375, PETRI_TRANSITIONS=524} [2024-06-21 17:53:07,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 334 predicate places. [2024-06-21 17:53:07,587 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 524 transitions, 8097 flow [2024-06-21 17:53:07,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:07,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:07,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:07,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 17:53:07,587 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 17:53:07,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:07,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1100987969, now seen corresponding path program 9 times [2024-06-21 17:53:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:07,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520760285] [2024-06-21 17:53:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:08,205 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 17:53:08,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:08,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520760285] [2024-06-21 17:53:08,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520760285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:08,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:08,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:08,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743687470] [2024-06-21 17:53:08,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:08,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:08,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:08,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 524 transitions, 8097 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:08,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:08,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:08,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:10,238 INFO L124 PetriNetUnfolderBase]: 5840/8856 cut-off events. [2024-06-21 17:53:10,239 INFO L125 PetriNetUnfolderBase]: For 850662/850664 co-relation queries the response was YES. [2024-06-21 17:53:10,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75465 conditions, 8856 events. 5840/8856 cut-off events. For 850662/850664 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 53143 event pairs, 1353 based on Foata normal form. 8/8864 useless extension candidates. Maximal degree in co-relation 75284. Up to 8753 conditions per place. [2024-06-21 17:53:10,376 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 510 selfloop transitions, 31 changer transitions 0/544 dead transitions. [2024-06-21 17:53:10,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 544 transitions, 9265 flow [2024-06-21 17:53:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 17:53:10,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-21 17:53:10,377 INFO L175 Difference]: Start difference. First operand has 375 places, 524 transitions, 8097 flow. Second operand 8 states and 129 transitions. [2024-06-21 17:53:10,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 544 transitions, 9265 flow [2024-06-21 17:53:12,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 544 transitions, 9148 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 17:53:12,920 INFO L231 Difference]: Finished difference. Result has 378 places, 524 transitions, 8048 flow [2024-06-21 17:53:12,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7980, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8048, PETRI_PLACES=378, PETRI_TRANSITIONS=524} [2024-06-21 17:53:12,920 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-21 17:53:12,920 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 524 transitions, 8048 flow [2024-06-21 17:53:12,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:12,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:12,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:12,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 17:53:12,921 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:12,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1484543405, now seen corresponding path program 1 times [2024-06-21 17:53:12,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:12,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767054682] [2024-06-21 17:53:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:13,558 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 17:53:13,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:13,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767054682] [2024-06-21 17:53:13,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767054682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:13,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:13,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:13,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991778805] [2024-06-21 17:53:13,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:13,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:13,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:13,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:13,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:13,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:13,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 524 transitions, 8048 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:13,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:13,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:13,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:15,846 INFO L124 PetriNetUnfolderBase]: 5870/8897 cut-off events. [2024-06-21 17:53:15,846 INFO L125 PetriNetUnfolderBase]: For 861626/861626 co-relation queries the response was YES. [2024-06-21 17:53:15,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75767 conditions, 8897 events. 5870/8897 cut-off events. For 861626/861626 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 53397 event pairs, 1347 based on Foata normal form. 4/8901 useless extension candidates. Maximal degree in co-relation 75585. Up to 8812 conditions per place. [2024-06-21 17:53:15,976 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 510 selfloop transitions, 40 changer transitions 0/553 dead transitions. [2024-06-21 17:53:15,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 553 transitions, 9357 flow [2024-06-21 17:53:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:53:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:53:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 17:53:15,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-21 17:53:15,977 INFO L175 Difference]: Start difference. First operand has 378 places, 524 transitions, 8048 flow. Second operand 9 states and 145 transitions. [2024-06-21 17:53:15,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 553 transitions, 9357 flow [2024-06-21 17:53:18,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 553 transitions, 9196 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:18,607 INFO L231 Difference]: Finished difference. Result has 382 places, 533 transitions, 8142 flow [2024-06-21 17:53:18,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7887, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8142, PETRI_PLACES=382, PETRI_TRANSITIONS=533} [2024-06-21 17:53:18,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-21 17:53:18,608 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 533 transitions, 8142 flow [2024-06-21 17:53:18,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:18,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:18,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:18,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 17:53:18,608 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:18,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2023532410, now seen corresponding path program 3 times [2024-06-21 17:53:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:18,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827080359] [2024-06-21 17:53:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:19,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827080359] [2024-06-21 17:53:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827080359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:19,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:19,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645576121] [2024-06-21 17:53:19,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:19,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:19,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:19,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 533 transitions, 8142 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:19,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:19,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:19,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:21,650 INFO L124 PetriNetUnfolderBase]: 5895/8932 cut-off events. [2024-06-21 17:53:21,650 INFO L125 PetriNetUnfolderBase]: For 884326/884326 co-relation queries the response was YES. [2024-06-21 17:53:22,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76831 conditions, 8932 events. 5895/8932 cut-off events. For 884326/884326 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 53610 event pairs, 1355 based on Foata normal form. 5/8937 useless extension candidates. Maximal degree in co-relation 76647. Up to 8783 conditions per place. [2024-06-21 17:53:22,098 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 508 selfloop transitions, 45 changer transitions 0/556 dead transitions. [2024-06-21 17:53:22,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 556 transitions, 9421 flow [2024-06-21 17:53:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 17:53:22,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-21 17:53:22,099 INFO L175 Difference]: Start difference. First operand has 382 places, 533 transitions, 8142 flow. Second operand 8 states and 134 transitions. [2024-06-21 17:53:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 556 transitions, 9421 flow [2024-06-21 17:53:24,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 556 transitions, 9307 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 17:53:24,875 INFO L231 Difference]: Finished difference. Result has 386 places, 536 transitions, 8221 flow [2024-06-21 17:53:24,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8028, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8221, PETRI_PLACES=386, PETRI_TRANSITIONS=536} [2024-06-21 17:53:24,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-21 17:53:24,876 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 536 transitions, 8221 flow [2024-06-21 17:53:24,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:24,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:24,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:24,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 17:53:24,876 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:24,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:24,877 INFO L85 PathProgramCache]: Analyzing trace with hash -130712985, now seen corresponding path program 10 times [2024-06-21 17:53:24,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:24,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926598066] [2024-06-21 17:53:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:24,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926598066] [2024-06-21 17:53:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926598066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:25,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:25,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954854550] [2024-06-21 17:53:25,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:25,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:25,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:25,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 536 transitions, 8221 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:25,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:25,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:27,609 INFO L124 PetriNetUnfolderBase]: 5877/8909 cut-off events. [2024-06-21 17:53:27,609 INFO L125 PetriNetUnfolderBase]: For 881761/881763 co-relation queries the response was YES. [2024-06-21 17:53:27,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76336 conditions, 8909 events. 5877/8909 cut-off events. For 881761/881763 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 53615 event pairs, 1346 based on Foata normal form. 8/8917 useless extension candidates. Maximal degree in co-relation 76150. Up to 8734 conditions per place. [2024-06-21 17:53:27,756 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 521 selfloop transitions, 37 changer transitions 0/561 dead transitions. [2024-06-21 17:53:27,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 561 transitions, 9445 flow [2024-06-21 17:53:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:53:27,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:53:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 17:53:27,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 17:53:27,758 INFO L175 Difference]: Start difference. First operand has 386 places, 536 transitions, 8221 flow. Second operand 7 states and 125 transitions. [2024-06-21 17:53:27,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 561 transitions, 9445 flow [2024-06-21 17:53:30,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 561 transitions, 9280 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 17:53:30,074 INFO L231 Difference]: Finished difference. Result has 387 places, 536 transitions, 8141 flow [2024-06-21 17:53:30,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8056, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8141, PETRI_PLACES=387, PETRI_TRANSITIONS=536} [2024-06-21 17:53:30,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-21 17:53:30,074 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 536 transitions, 8141 flow [2024-06-21 17:53:30,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:30,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:30,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:30,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 17:53:30,075 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:30,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:30,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1477179293, now seen corresponding path program 11 times [2024-06-21 17:53:30,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:30,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765967138] [2024-06-21 17:53:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:30,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:30,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:30,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765967138] [2024-06-21 17:53:30,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765967138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:30,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:30,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:30,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172313918] [2024-06-21 17:53:30,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:30,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:30,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:30,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:30,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 536 transitions, 8141 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:30,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:30,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:30,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:32,762 INFO L124 PetriNetUnfolderBase]: 5859/8885 cut-off events. [2024-06-21 17:53:32,762 INFO L125 PetriNetUnfolderBase]: For 856311/856313 co-relation queries the response was YES. [2024-06-21 17:53:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75374 conditions, 8885 events. 5859/8885 cut-off events. For 856311/856313 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 53417 event pairs, 1205 based on Foata normal form. 8/8893 useless extension candidates. Maximal degree in co-relation 75187. Up to 8228 conditions per place. [2024-06-21 17:53:32,914 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 477 selfloop transitions, 92 changer transitions 0/572 dead transitions. [2024-06-21 17:53:32,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 572 transitions, 9617 flow [2024-06-21 17:53:32,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 17:53:32,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 17:53:32,915 INFO L175 Difference]: Start difference. First operand has 387 places, 536 transitions, 8141 flow. Second operand 8 states and 152 transitions. [2024-06-21 17:53:32,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 572 transitions, 9617 flow [2024-06-21 17:53:35,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 572 transitions, 9490 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:35,714 INFO L231 Difference]: Finished difference. Result has 388 places, 536 transitions, 8211 flow [2024-06-21 17:53:35,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8014, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8211, PETRI_PLACES=388, PETRI_TRANSITIONS=536} [2024-06-21 17:53:35,714 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-21 17:53:35,714 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 536 transitions, 8211 flow [2024-06-21 17:53:35,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:35,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:35,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:35,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 17:53:35,715 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:35,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1490072255, now seen corresponding path program 2 times [2024-06-21 17:53:35,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:35,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198628436] [2024-06-21 17:53:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:35,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:36,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:36,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198628436] [2024-06-21 17:53:36,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198628436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:36,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:36,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358940570] [2024-06-21 17:53:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:36,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:36,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:36,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:36,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:36,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:36,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 536 transitions, 8211 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:36,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:36,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:36,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:38,828 INFO L124 PetriNetUnfolderBase]: 5889/8926 cut-off events. [2024-06-21 17:53:38,828 INFO L125 PetriNetUnfolderBase]: For 866867/866867 co-relation queries the response was YES. [2024-06-21 17:53:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76194 conditions, 8926 events. 5889/8926 cut-off events. For 866867/866867 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 53604 event pairs, 1347 based on Foata normal form. 4/8930 useless extension candidates. Maximal degree in co-relation 76006. Up to 8798 conditions per place. [2024-06-21 17:53:38,953 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 510 selfloop transitions, 52 changer transitions 0/565 dead transitions. [2024-06-21 17:53:38,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 565 transitions, 9538 flow [2024-06-21 17:53:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 17:53:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 17:53:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-21 17:53:38,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840909090909091 [2024-06-21 17:53:38,954 INFO L175 Difference]: Start difference. First operand has 388 places, 536 transitions, 8211 flow. Second operand 11 states and 169 transitions. [2024-06-21 17:53:38,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 565 transitions, 9538 flow [2024-06-21 17:53:41,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 565 transitions, 9307 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 17:53:41,836 INFO L231 Difference]: Finished difference. Result has 392 places, 542 transitions, 8236 flow [2024-06-21 17:53:41,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7980, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8236, PETRI_PLACES=392, PETRI_TRANSITIONS=542} [2024-06-21 17:53:41,837 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 351 predicate places. [2024-06-21 17:53:41,837 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 542 transitions, 8236 flow [2024-06-21 17:53:41,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:41,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:41,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:41,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 17:53:41,838 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:41,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 733134853, now seen corresponding path program 12 times [2024-06-21 17:53:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:41,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362952970] [2024-06-21 17:53:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:42,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:42,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362952970] [2024-06-21 17:53:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362952970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:42,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:53:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264893253] [2024-06-21 17:53:42,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:42,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:53:42,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:42,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:53:42,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:53:42,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:42,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 542 transitions, 8236 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:42,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:42,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:42,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:44,595 INFO L124 PetriNetUnfolderBase]: 5871/8903 cut-off events. [2024-06-21 17:53:44,595 INFO L125 PetriNetUnfolderBase]: For 851088/851090 co-relation queries the response was YES. [2024-06-21 17:53:44,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75560 conditions, 8903 events. 5871/8903 cut-off events. For 851088/851090 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 53520 event pairs, 1209 based on Foata normal form. 8/8911 useless extension candidates. Maximal degree in co-relation 75371. Up to 8259 conditions per place. [2024-06-21 17:53:44,746 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 475 selfloop transitions, 102 changer transitions 0/580 dead transitions. [2024-06-21 17:53:44,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 580 transitions, 9554 flow [2024-06-21 17:53:44,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 17:53:44,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-21 17:53:44,747 INFO L175 Difference]: Start difference. First operand has 392 places, 542 transitions, 8236 flow. Second operand 8 states and 155 transitions. [2024-06-21 17:53:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 580 transitions, 9554 flow [2024-06-21 17:53:47,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 580 transitions, 9357 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:47,482 INFO L231 Difference]: Finished difference. Result has 393 places, 542 transitions, 8255 flow [2024-06-21 17:53:47,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8039, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8255, PETRI_PLACES=393, PETRI_TRANSITIONS=542} [2024-06-21 17:53:47,483 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 352 predicate places. [2024-06-21 17:53:47,483 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 542 transitions, 8255 flow [2024-06-21 17:53:47,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:47,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:47,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:47,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 17:53:47,484 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:47,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:47,484 INFO L85 PathProgramCache]: Analyzing trace with hash 130591929, now seen corresponding path program 3 times [2024-06-21 17:53:47,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:47,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081913561] [2024-06-21 17:53:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:47,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:53:48,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081913561] [2024-06-21 17:53:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081913561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052295481] [2024-06-21 17:53:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:48,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:48,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 542 transitions, 8255 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:48,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:48,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:48,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:50,489 INFO L124 PetriNetUnfolderBase]: 5901/8944 cut-off events. [2024-06-21 17:53:50,489 INFO L125 PetriNetUnfolderBase]: For 860635/860635 co-relation queries the response was YES. [2024-06-21 17:53:50,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76205 conditions, 8944 events. 5901/8944 cut-off events. For 860635/860635 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 53753 event pairs, 1340 based on Foata normal form. 4/8948 useless extension candidates. Maximal degree in co-relation 76015. Up to 8817 conditions per place. [2024-06-21 17:53:50,629 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 515 selfloop transitions, 54 changer transitions 0/572 dead transitions. [2024-06-21 17:53:50,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 572 transitions, 9619 flow [2024-06-21 17:53:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:53:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:53:50,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:53:50,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:53:50,630 INFO L175 Difference]: Start difference. First operand has 393 places, 542 transitions, 8255 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:53:50,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 572 transitions, 9619 flow [2024-06-21 17:53:54,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 572 transitions, 9458 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:53:54,262 INFO L231 Difference]: Finished difference. Result has 396 places, 551 transitions, 8412 flow [2024-06-21 17:53:54,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8412, PETRI_PLACES=396, PETRI_TRANSITIONS=551} [2024-06-21 17:53:54,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 355 predicate places. [2024-06-21 17:53:54,262 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 551 transitions, 8412 flow [2024-06-21 17:53:54,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:54,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:53:54,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:53:54,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 17:53:54,263 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:53:54,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:53:54,263 INFO L85 PathProgramCache]: Analyzing trace with hash -85798730, now seen corresponding path program 4 times [2024-06-21 17:53:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:53:54,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503307800] [2024-06-21 17:53:54,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:53:54,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:53:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:53:55,335 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 17:53:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:53:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503307800] [2024-06-21 17:53:55,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503307800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:53:55,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:53:55,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:53:55,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646622854] [2024-06-21 17:53:55,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:53:55,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:53:55,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:53:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:53:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:53:55,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:53:55,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 551 transitions, 8412 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:53:55,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:53:55,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:53:55,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:53:58,144 INFO L124 PetriNetUnfolderBase]: 5886/8924 cut-off events. [2024-06-21 17:53:58,144 INFO L125 PetriNetUnfolderBase]: For 831099/831099 co-relation queries the response was YES. [2024-06-21 17:53:58,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75534 conditions, 8924 events. 5886/8924 cut-off events. For 831099/831099 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 53698 event pairs, 1321 based on Foata normal form. 5/8929 useless extension candidates. Maximal degree in co-relation 75342. Up to 8629 conditions per place. [2024-06-21 17:53:58,266 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 497 selfloop transitions, 75 changer transitions 0/575 dead transitions. [2024-06-21 17:53:58,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 575 transitions, 9658 flow [2024-06-21 17:53:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:53:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:53:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 17:53:58,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 17:53:58,267 INFO L175 Difference]: Start difference. First operand has 396 places, 551 transitions, 8412 flow. Second operand 7 states and 128 transitions. [2024-06-21 17:53:58,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 575 transitions, 9658 flow [2024-06-21 17:54:01,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 575 transitions, 9463 flow, removed 62 selfloop flow, removed 4 redundant places. [2024-06-21 17:54:01,543 INFO L231 Difference]: Finished difference. Result has 399 places, 551 transitions, 8406 flow [2024-06-21 17:54:01,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8406, PETRI_PLACES=399, PETRI_TRANSITIONS=551} [2024-06-21 17:54:01,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-21 17:54:01,543 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 551 transitions, 8406 flow [2024-06-21 17:54:01,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:01,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:01,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:01,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 17:54:01,544 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:01,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:01,544 INFO L85 PathProgramCache]: Analyzing trace with hash -93036765, now seen corresponding path program 4 times [2024-06-21 17:54:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:01,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715458792] [2024-06-21 17:54:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:01,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:02,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:02,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715458792] [2024-06-21 17:54:02,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715458792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:02,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:02,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:54:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264054774] [2024-06-21 17:54:02,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:02,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:54:02,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:02,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:54:02,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:54:02,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:54:02,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 551 transitions, 8406 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:02,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:02,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:54:02,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:05,127 INFO L124 PetriNetUnfolderBase]: 5961/9029 cut-off events. [2024-06-21 17:54:05,127 INFO L125 PetriNetUnfolderBase]: For 842393/842393 co-relation queries the response was YES. [2024-06-21 17:54:05,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76604 conditions, 9029 events. 5961/9029 cut-off events. For 842393/842393 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 54288 event pairs, 1338 based on Foata normal form. 4/9033 useless extension candidates. Maximal degree in co-relation 76411. Up to 8804 conditions per place. [2024-06-21 17:54:05,264 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 507 selfloop transitions, 86 changer transitions 0/596 dead transitions. [2024-06-21 17:54:05,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 596 transitions, 10056 flow [2024-06-21 17:54:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 17:54:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 17:54:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 17:54:05,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075 [2024-06-21 17:54:05,266 INFO L175 Difference]: Start difference. First operand has 399 places, 551 transitions, 8406 flow. Second operand 10 states and 163 transitions. [2024-06-21 17:54:05,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 596 transitions, 10056 flow [2024-06-21 17:54:08,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 596 transitions, 9836 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 17:54:08,026 INFO L231 Difference]: Finished difference. Result has 403 places, 570 transitions, 8789 flow [2024-06-21 17:54:08,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8220, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8789, PETRI_PLACES=403, PETRI_TRANSITIONS=570} [2024-06-21 17:54:08,026 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-21 17:54:08,026 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 570 transitions, 8789 flow [2024-06-21 17:54:08,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:08,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:08,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:08,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 17:54:08,027 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:08,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:08,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1279794273, now seen corresponding path program 5 times [2024-06-21 17:54:08,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:08,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019614933] [2024-06-21 17:54:08,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:08,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:08,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:08,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019614933] [2024-06-21 17:54:08,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019614933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:08,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:08,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:54:08,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464871118] [2024-06-21 17:54:08,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:08,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:54:08,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:54:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:54:08,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:54:08,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 570 transitions, 8789 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:08,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:08,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:54:08,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:11,714 INFO L124 PetriNetUnfolderBase]: 6043/9144 cut-off events. [2024-06-21 17:54:11,715 INFO L125 PetriNetUnfolderBase]: For 847170/847172 co-relation queries the response was YES. [2024-06-21 17:54:11,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77370 conditions, 9144 events. 6043/9144 cut-off events. For 847170/847172 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 55052 event pairs, 1236 based on Foata normal form. 10/9154 useless extension candidates. Maximal degree in co-relation 77176. Up to 8060 conditions per place. [2024-06-21 17:54:11,854 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 454 selfloop transitions, 160 changer transitions 0/617 dead transitions. [2024-06-21 17:54:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 617 transitions, 10642 flow [2024-06-21 17:54:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 17:54:11,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-21 17:54:11,855 INFO L175 Difference]: Start difference. First operand has 403 places, 570 transitions, 8789 flow. Second operand 8 states and 156 transitions. [2024-06-21 17:54:11,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 617 transitions, 10642 flow [2024-06-21 17:54:14,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 617 transitions, 10394 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:14,946 INFO L231 Difference]: Finished difference. Result has 409 places, 579 transitions, 9246 flow [2024-06-21 17:54:14,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8561, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9246, PETRI_PLACES=409, PETRI_TRANSITIONS=579} [2024-06-21 17:54:14,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 368 predicate places. [2024-06-21 17:54:14,947 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 579 transitions, 9246 flow [2024-06-21 17:54:14,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:14,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:14,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 17:54:14,947 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:14,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash -917354909, now seen corresponding path program 6 times [2024-06-21 17:54:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:14,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880975702] [2024-06-21 17:54:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:15,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:15,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880975702] [2024-06-21 17:54:15,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880975702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:15,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:15,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:54:15,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412379527] [2024-06-21 17:54:15,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:15,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:54:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:15,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:54:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:54:15,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:54:15,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 579 transitions, 9246 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:15,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:15,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:54:15,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:18,494 INFO L124 PetriNetUnfolderBase]: 6031/9127 cut-off events. [2024-06-21 17:54:18,494 INFO L125 PetriNetUnfolderBase]: For 819511/819511 co-relation queries the response was YES. [2024-06-21 17:54:18,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77581 conditions, 9127 events. 6031/9127 cut-off events. For 819511/819511 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 54954 event pairs, 1301 based on Foata normal form. 4/9131 useless extension candidates. Maximal degree in co-relation 77385. Up to 8700 conditions per place. [2024-06-21 17:54:18,642 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 487 selfloop transitions, 124 changer transitions 0/614 dead transitions. [2024-06-21 17:54:18,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 614 transitions, 10709 flow [2024-06-21 17:54:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 17:54:18,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-21 17:54:18,643 INFO L175 Difference]: Start difference. First operand has 409 places, 579 transitions, 9246 flow. Second operand 8 states and 147 transitions. [2024-06-21 17:54:18,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 614 transitions, 10709 flow [2024-06-21 17:54:22,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 614 transitions, 10491 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-21 17:54:22,306 INFO L231 Difference]: Finished difference. Result has 413 places, 583 transitions, 9495 flow [2024-06-21 17:54:22,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9032, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9495, PETRI_PLACES=413, PETRI_TRANSITIONS=583} [2024-06-21 17:54:22,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-21 17:54:22,307 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 583 transitions, 9495 flow [2024-06-21 17:54:22,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:22,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:22,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:22,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 17:54:22,307 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 17:54:22,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:22,307 INFO L85 PathProgramCache]: Analyzing trace with hash 354984057, now seen corresponding path program 2 times [2024-06-21 17:54:22,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:22,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412824935] [2024-06-21 17:54:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:22,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:23,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412824935] [2024-06-21 17:54:23,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412824935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:23,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:23,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:54:23,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300707926] [2024-06-21 17:54:23,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:23,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:54:23,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:54:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:54:23,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:54:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 583 transitions, 9495 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:54:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:26,049 INFO L124 PetriNetUnfolderBase]: 6021/9114 cut-off events. [2024-06-21 17:54:26,049 INFO L125 PetriNetUnfolderBase]: For 801560/801562 co-relation queries the response was YES. [2024-06-21 17:54:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77464 conditions, 9114 events. 6021/9114 cut-off events. For 801560/801562 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 54875 event pairs, 1237 based on Foata normal form. 6/9120 useless extension candidates. Maximal degree in co-relation 77266. Up to 8559 conditions per place. [2024-06-21 17:54:26,183 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 522 selfloop transitions, 97 changer transitions 0/622 dead transitions. [2024-06-21 17:54:26,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 622 transitions, 11348 flow [2024-06-21 17:54:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:54:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:54:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 17:54:26,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-21 17:54:26,184 INFO L175 Difference]: Start difference. First operand has 413 places, 583 transitions, 9495 flow. Second operand 8 states and 135 transitions. [2024-06-21 17:54:26,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 622 transitions, 11348 flow [2024-06-21 17:54:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 622 transitions, 11118 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 17:54:28,792 INFO L231 Difference]: Finished difference. Result has 416 places, 598 transitions, 9852 flow [2024-06-21 17:54:28,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9267, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9852, PETRI_PLACES=416, PETRI_TRANSITIONS=598} [2024-06-21 17:54:28,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-21 17:54:28,793 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 598 transitions, 9852 flow [2024-06-21 17:54:28,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:28,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:28,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:28,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 17:54:28,793 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 17:54:28,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1651132485, now seen corresponding path program 7 times [2024-06-21 17:54:28,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:28,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699961877] [2024-06-21 17:54:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:28,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:54:29,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:29,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699961877] [2024-06-21 17:54:29,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699961877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:29,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:29,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:54:29,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136381957] [2024-06-21 17:54:29,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:29,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:54:29,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:54:29,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:54:29,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:54:29,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 598 transitions, 9852 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:29,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:29,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:54:29,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:32,602 INFO L124 PetriNetUnfolderBase]: 6067/9188 cut-off events. [2024-06-21 17:54:32,603 INFO L125 PetriNetUnfolderBase]: For 855631/855633 co-relation queries the response was YES. [2024-06-21 17:54:32,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78163 conditions, 9188 events. 6067/9188 cut-off events. For 855631/855633 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 55263 event pairs, 1214 based on Foata normal form. 22/9210 useless extension candidates. Maximal degree in co-relation 77964. Up to 8207 conditions per place. [2024-06-21 17:54:32,736 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 437 selfloop transitions, 199 changer transitions 0/639 dead transitions. [2024-06-21 17:54:32,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 639 transitions, 11350 flow [2024-06-21 17:54:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:54:32,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:54:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 17:54:32,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 17:54:32,737 INFO L175 Difference]: Start difference. First operand has 416 places, 598 transitions, 9852 flow. Second operand 9 states and 170 transitions. [2024-06-21 17:54:32,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 639 transitions, 11350 flow [2024-06-21 17:54:36,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 639 transitions, 11183 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 17:54:36,409 INFO L231 Difference]: Finished difference. Result has 422 places, 600 transitions, 10177 flow [2024-06-21 17:54:36,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10177, PETRI_PLACES=422, PETRI_TRANSITIONS=600} [2024-06-21 17:54:36,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-21 17:54:36,410 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 600 transitions, 10177 flow [2024-06-21 17:54:36,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:36,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:36,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:36,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 17:54:36,411 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 17:54:36,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1651141785, now seen corresponding path program 8 times [2024-06-21 17:54:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625630286] [2024-06-21 17:54:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:36,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:54:37,775 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 17:54:37,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:54:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625630286] [2024-06-21 17:54:37,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625630286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:54:37,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:54:37,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 17:54:37,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779285468] [2024-06-21 17:54:37,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:54:37,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 17:54:37,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:54:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 17:54:37,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 17:54:37,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-21 17:54:37,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 600 transitions, 10177 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:37,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:54:37,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-21 17:54:37,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:54:40,603 INFO L124 PetriNetUnfolderBase]: 6172/9347 cut-off events. [2024-06-21 17:54:40,603 INFO L125 PetriNetUnfolderBase]: For 884326/884328 co-relation queries the response was YES. [2024-06-21 17:54:40,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80543 conditions, 9347 events. 6172/9347 cut-off events. For 884326/884328 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 56215 event pairs, 964 based on Foata normal form. 18/9365 useless extension candidates. Maximal degree in co-relation 80342. Up to 7486 conditions per place. [2024-06-21 17:54:40,743 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 446 selfloop transitions, 210 changer transitions 0/659 dead transitions. [2024-06-21 17:54:40,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 659 transitions, 12105 flow [2024-06-21 17:54:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 17:54:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 17:54:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 17:54:40,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-21 17:54:40,744 INFO L175 Difference]: Start difference. First operand has 422 places, 600 transitions, 10177 flow. Second operand 9 states and 177 transitions. [2024-06-21 17:54:40,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 659 transitions, 12105 flow [2024-06-21 17:54:44,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 659 transitions, 11627 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 17:54:44,696 INFO L231 Difference]: Finished difference. Result has 428 places, 611 transitions, 10604 flow [2024-06-21 17:54:44,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9717, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10604, PETRI_PLACES=428, PETRI_TRANSITIONS=611} [2024-06-21 17:54:44,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 387 predicate places. [2024-06-21 17:54:44,697 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 611 transitions, 10604 flow [2024-06-21 17:54:44,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:54:44,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:54:44,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:54:44,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 17:54:44,698 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 17:54:44,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:54:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1339549625, now seen corresponding path program 3 times [2024-06-21 17:54:44,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:54:44,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721761920] [2024-06-21 17:54:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:54:44,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:54:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat