./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix003.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix003.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix003.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix003.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:09:59,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:09:59,594 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:09:59,599 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:09:59,600 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:09:59,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:09:59,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:09:59,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:09:59,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:09:59,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:09:59,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:09:59,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:09:59,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:09:59,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:09:59,622 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:09:59,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:09:59,623 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:09:59,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:09:59,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:09:59,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:09:59,624 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:09:59,625 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:09:59,625 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:09:59,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:09:59,626 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:09:59,626 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:09:59,626 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:09:59,627 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:09:59,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:09:59,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:09:59,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:09:59,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:09:59,628 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:09:59,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:09:59,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:09:59,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:09:59,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:09:59,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:09:59,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:09:59,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:09:59,630 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:09:59,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:09:59,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:09:59,631 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:09:59,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:09:59,913 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:09:59,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:09:59,916 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:09:59,917 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:09:59,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix003.oepc.yml/witness.yml [2024-06-21 16:10:00,097 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:10:00,097 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:10:00,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix003.oepc.i [2024-06-21 16:10:01,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:10:01,586 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:10:01,586 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix003.oepc.i [2024-06-21 16:10:01,599 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aa8eb146/9e3f51bcca7e47ad84e6577768310d01/FLAGc0d626087 [2024-06-21 16:10:01,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aa8eb146/9e3f51bcca7e47ad84e6577768310d01 [2024-06-21 16:10:01,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:10:01,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:10:01,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:10:01,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:10:01,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:10:01,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:10:00" (1/2) ... [2024-06-21 16:10:01,622 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3100a05 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:10:01, skipping insertion in model container [2024-06-21 16:10:01,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:10:00" (1/2) ... [2024-06-21 16:10:01,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2dab7a98 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:10:01, skipping insertion in model container [2024-06-21 16:10:01,624 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:10:01" (2/2) ... [2024-06-21 16:10:01,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3100a05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:01, skipping insertion in model container [2024-06-21 16:10:01,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:10:01" (2/2) ... [2024-06-21 16:10:01,625 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:10:01,715 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:10:01,717 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:10:01,717 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:10:01,717 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((! multithreaded || z$read_delayed_var == 0) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) [2024-06-21 16:10:01,718 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:10:01,718 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-21 16:10:01,762 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:10:02,116 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:10:02,126 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:10:02,289 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:10:02,362 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:10:02,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02 WrapperNode [2024-06-21 16:10:02,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:10:02,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:10:02,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:10:02,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:10:02,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,433 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,462 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-21 16:10:02,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:10:02,463 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:10:02,464 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:10:02,464 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:10:02,474 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,477 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,492 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:10:02,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,493 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,519 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:10:02,520 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:10:02,520 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:10:02,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:10:02,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (1/1) ... [2024-06-21 16:10:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:10:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:10:02,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:10:02,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:10:02,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:10:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:10:02,606 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:10:02,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:10:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:10:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:10:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:10:02,607 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:10:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:10:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:10:02,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:10:02,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:10:02,611 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:10:02,747 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:10:02,750 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:10:03,068 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:10:03,068 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:10:03,234 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:10:03,234 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:10:03,235 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:10:03 BoogieIcfgContainer [2024-06-21 16:10:03,236 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:10:03,239 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:10:03,239 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:10:03,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:10:03,242 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:10:00" (1/4) ... [2024-06-21 16:10:03,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5f4357 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:10:03, skipping insertion in model container [2024-06-21 16:10:03,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:10:01" (2/4) ... [2024-06-21 16:10:03,244 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5f4357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:10:03, skipping insertion in model container [2024-06-21 16:10:03,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:10:02" (3/4) ... [2024-06-21 16:10:03,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5f4357 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:10:03, skipping insertion in model container [2024-06-21 16:10:03,245 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:10:03" (4/4) ... [2024-06-21 16:10:03,247 INFO L112 eAbstractionObserver]: Analyzing ICFG mix003.oepc.i [2024-06-21 16:10:03,263 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:10:03,263 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:10:03,263 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:10:03,343 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:10:03,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:10:03,415 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 16:10:03,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:10:03,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:10:03,418 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 16:10:03,421 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 16:10:03,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:10:03,441 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;@43e91a93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:10:03,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:10:03,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:10:03,448 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:10:03,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:10:03,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:03,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:10:03,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:03,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:03,455 INFO L85 PathProgramCache]: Analyzing trace with hash 380730443, now seen corresponding path program 1 times [2024-06-21 16:10:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:03,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462602366] [2024-06-21 16:10:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:03,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:04,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462602366] [2024-06-21 16:10:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462602366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:04,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:04,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:10:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26555982] [2024-06-21 16:10:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:04,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:10:04,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:04,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:10:04,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:10:04,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 16:10:04,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:04,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:04,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 16:10:04,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:05,188 INFO L124 PetriNetUnfolderBase]: 1116/1766 cut-off events. [2024-06-21 16:10:05,189 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 16:10:05,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3517 conditions, 1766 events. 1116/1766 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8814 event pairs, 765 based on Foata normal form. 1/1713 useless extension candidates. Maximal degree in co-relation 3505. Up to 1676 conditions per place. [2024-06-21 16:10:05,204 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 16:10:05,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-21 16:10:05,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:10:05,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:10:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-21 16:10:05,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 16:10:05,217 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-21 16:10:05,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-21 16:10:05,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:05,222 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 16:10:05,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 16:10:05,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 16:10:05,227 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 16:10:05,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:05,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:05,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:05,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:10:05,228 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:05,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:05,229 INFO L85 PathProgramCache]: Analyzing trace with hash 810521078, now seen corresponding path program 1 times [2024-06-21 16:10:05,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:05,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574830705] [2024-06-21 16:10:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:05,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:06,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:06,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574830705] [2024-06-21 16:10:06,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574830705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:06,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:06,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:10:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352350306] [2024-06-21 16:10:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:10:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:10:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:10:06,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 16:10:06,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 16:10:06,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:06,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 16:10:06,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:06,426 INFO L124 PetriNetUnfolderBase]: 1110/1773 cut-off events. [2024-06-21 16:10:06,426 INFO L125 PetriNetUnfolderBase]: For 354/354 co-relation queries the response was YES. [2024-06-21 16:10:06,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3994 conditions, 1773 events. 1110/1773 cut-off events. For 354/354 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8861 event pairs, 641 based on Foata normal form. 3/1758 useless extension candidates. Maximal degree in co-relation 3982. Up to 1652 conditions per place. [2024-06-21 16:10:06,437 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 16:10:06,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-21 16:10:06,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:10:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:10:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-21 16:10:06,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:10:06,441 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 104 transitions. [2024-06-21 16:10:06,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-21 16:10:06,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:10:06,444 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 16:10:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 16:10:06,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 16:10:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 16:10:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 16:10:06,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:06,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:10:06,449 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:06,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:06,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1521713301, now seen corresponding path program 1 times [2024-06-21 16:10:06,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436431841] [2024-06-21 16:10:06,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:06,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:07,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:07,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436431841] [2024-06-21 16:10:07,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436431841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:07,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:07,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:10:07,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819724851] [2024-06-21 16:10:07,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:07,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:10:07,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:10:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:10:07,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 16:10:07,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:07,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:07,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 16:10:07,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:08,271 INFO L124 PetriNetUnfolderBase]: 1345/2122 cut-off events. [2024-06-21 16:10:08,272 INFO L125 PetriNetUnfolderBase]: For 1153/1153 co-relation queries the response was YES. [2024-06-21 16:10:08,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5301 conditions, 2122 events. 1345/2122 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10709 event pairs, 592 based on Foata normal form. 3/2102 useless extension candidates. Maximal degree in co-relation 5287. Up to 1965 conditions per place. [2024-06-21 16:10:08,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-21 16:10:08,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 372 flow [2024-06-21 16:10:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 16:10:08,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 16:10:08,292 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 147 transitions. [2024-06-21 16:10:08,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 372 flow [2024-06-21 16:10:08,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 352 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 16:10:08,296 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-21 16:10:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 16:10:08,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-21 16:10:08,298 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-21 16:10:08,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:08,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:08,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:08,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:10:08,299 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:08,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash -927427979, now seen corresponding path program 1 times [2024-06-21 16:10:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:08,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278693299] [2024-06-21 16:10:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:08,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:09,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278693299] [2024-06-21 16:10:09,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278693299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:09,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:09,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:09,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422378931] [2024-06-21 16:10:09,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:09,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:09,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:09,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:09,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:09,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 16:10:09,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:09,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:09,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 16:10:09,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:10,298 INFO L124 PetriNetUnfolderBase]: 1336/2103 cut-off events. [2024-06-21 16:10:10,298 INFO L125 PetriNetUnfolderBase]: For 2265/2265 co-relation queries the response was YES. [2024-06-21 16:10:10,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5872 conditions, 2103 events. 1336/2103 cut-off events. For 2265/2265 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10534 event pairs, 450 based on Foata normal form. 6/2084 useless extension candidates. Maximal degree in co-relation 5856. Up to 1920 conditions per place. [2024-06-21 16:10:10,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-21 16:10:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 432 flow [2024-06-21 16:10:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 16:10:10,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-21 16:10:10,314 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 166 transitions. [2024-06-21 16:10:10,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 432 flow [2024-06-21 16:10:10,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 404 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:10,318 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-21 16:10:10,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 16:10:10,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 16:10:10,319 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-21 16:10:10,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:10,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:10,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:10,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:10:10,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:10,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:10,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1592598440, now seen corresponding path program 1 times [2024-06-21 16:10:10,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:10,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535006728] [2024-06-21 16:10:10,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:10,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:10,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:10,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535006728] [2024-06-21 16:10:10,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535006728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:10,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:10,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:10:10,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492483958] [2024-06-21 16:10:10,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:10,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:10:10,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:10,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:10:10,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:10:10,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:10,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:10,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:10,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:10,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:11,533 INFO L124 PetriNetUnfolderBase]: 1627/2518 cut-off events. [2024-06-21 16:10:11,533 INFO L125 PetriNetUnfolderBase]: For 3868/3868 co-relation queries the response was YES. [2024-06-21 16:10:11,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7426 conditions, 2518 events. 1627/2518 cut-off events. For 3868/3868 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12327 event pairs, 689 based on Foata normal form. 2/2519 useless extension candidates. Maximal degree in co-relation 7408. Up to 2407 conditions per place. [2024-06-21 16:10:11,552 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-21 16:10:11,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 371 flow [2024-06-21 16:10:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:10:11,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:10:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 16:10:11,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 16:10:11,553 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 96 transitions. [2024-06-21 16:10:11,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 371 flow [2024-06-21 16:10:11,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 332 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:11,559 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-21 16:10:11,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-21 16:10:11,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-21 16:10:11,560 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-21 16:10:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:11,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:11,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:11,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:10:11,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:11,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2125910344, now seen corresponding path program 1 times [2024-06-21 16:10:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544868802] [2024-06-21 16:10:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:11,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:12,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544868802] [2024-06-21 16:10:12,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544868802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:12,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:12,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:12,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114944563] [2024-06-21 16:10:12,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:12,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:12,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:12,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:13,054 INFO L124 PetriNetUnfolderBase]: 1617/2513 cut-off events. [2024-06-21 16:10:13,054 INFO L125 PetriNetUnfolderBase]: For 5557/5557 co-relation queries the response was YES. [2024-06-21 16:10:13,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7870 conditions, 2513 events. 1617/2513 cut-off events. For 5557/5557 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12353 event pairs, 653 based on Foata normal form. 4/2516 useless extension candidates. Maximal degree in co-relation 7850. Up to 2375 conditions per place. [2024-06-21 16:10:13,071 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 52 selfloop transitions, 11 changer transitions 0/68 dead transitions. [2024-06-21 16:10:13,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 410 flow [2024-06-21 16:10:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-21 16:10:13,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:10:13,073 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 114 transitions. [2024-06-21 16:10:13,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 410 flow [2024-06-21 16:10:13,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 388 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:13,079 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 258 flow [2024-06-21 16:10:13,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-21 16:10:13,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-21 16:10:13,082 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 258 flow [2024-06-21 16:10:13,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:13,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:13,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:13,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:10:13,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:13,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash -80306019, now seen corresponding path program 1 times [2024-06-21 16:10:13,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:13,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372005851] [2024-06-21 16:10:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:13,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:14,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:14,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372005851] [2024-06-21 16:10:14,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372005851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:14,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:14,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:14,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439504573] [2024-06-21 16:10:14,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:14,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:14,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:14,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:14,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:14,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:14,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:14,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:14,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:14,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:14,526 INFO L124 PetriNetUnfolderBase]: 1628/2559 cut-off events. [2024-06-21 16:10:14,526 INFO L125 PetriNetUnfolderBase]: For 7200/7206 co-relation queries the response was YES. [2024-06-21 16:10:14,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8531 conditions, 2559 events. 1628/2559 cut-off events. For 7200/7206 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12695 event pairs, 654 based on Foata normal form. 6/2563 useless extension candidates. Maximal degree in co-relation 8510. Up to 2374 conditions per place. [2024-06-21 16:10:14,556 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-21 16:10:14,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 522 flow [2024-06-21 16:10:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 16:10:14,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 16:10:14,558 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 258 flow. Second operand 6 states and 120 transitions. [2024-06-21 16:10:14,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 522 flow [2024-06-21 16:10:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 490 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:14,565 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 316 flow [2024-06-21 16:10:14,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-21 16:10:14,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 16:10:14,566 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 316 flow [2024-06-21 16:10:14,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:14,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:14,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:14,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:10:14,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:14,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash -69056739, now seen corresponding path program 2 times [2024-06-21 16:10:14,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:14,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384445114] [2024-06-21 16:10:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:14,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:15,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:15,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384445114] [2024-06-21 16:10:15,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384445114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:15,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:15,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:15,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771292548] [2024-06-21 16:10:15,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:15,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:15,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:15,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:15,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:15,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 316 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:15,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:15,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:15,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:15,987 INFO L124 PetriNetUnfolderBase]: 1623/2551 cut-off events. [2024-06-21 16:10:15,988 INFO L125 PetriNetUnfolderBase]: For 9190/9190 co-relation queries the response was YES. [2024-06-21 16:10:15,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9033 conditions, 2551 events. 1623/2551 cut-off events. For 9190/9190 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12639 event pairs, 650 based on Foata normal form. 2/2552 useless extension candidates. Maximal degree in co-relation 9011. Up to 2393 conditions per place. [2024-06-21 16:10:16,005 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2024-06-21 16:10:16,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 490 flow [2024-06-21 16:10:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:16,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-21 16:10:16,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-21 16:10:16,008 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 316 flow. Second operand 6 states and 113 transitions. [2024-06-21 16:10:16,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 490 flow [2024-06-21 16:10:16,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 452 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 16:10:16,018 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 308 flow [2024-06-21 16:10:16,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=308, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2024-06-21 16:10:16,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-21 16:10:16,022 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 308 flow [2024-06-21 16:10:16,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:16,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:16,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:16,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:10:16,023 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:16,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1227128861, now seen corresponding path program 1 times [2024-06-21 16:10:16,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:16,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370519590] [2024-06-21 16:10:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:16,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:17,070 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 16:10:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370519590] [2024-06-21 16:10:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370519590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:17,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:17,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:17,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356415456] [2024-06-21 16:10:17,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:17,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:17,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:17,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:17,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:17,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:17,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 308 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:17,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:17,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:17,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:17,738 INFO L124 PetriNetUnfolderBase]: 1634/2566 cut-off events. [2024-06-21 16:10:17,739 INFO L125 PetriNetUnfolderBase]: For 10693/10693 co-relation queries the response was YES. [2024-06-21 16:10:17,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9225 conditions, 2566 events. 1634/2566 cut-off events. For 10693/10693 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12672 event pairs, 632 based on Foata normal form. 2/2567 useless extension candidates. Maximal degree in co-relation 9201. Up to 2388 conditions per place. [2024-06-21 16:10:17,757 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 67 selfloop transitions, 14 changer transitions 0/86 dead transitions. [2024-06-21 16:10:17,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 86 transitions, 560 flow [2024-06-21 16:10:17,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 16:10:17,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 16:10:17,759 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 308 flow. Second operand 7 states and 136 transitions. [2024-06-21 16:10:17,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 86 transitions, 560 flow [2024-06-21 16:10:17,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 526 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:17,769 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 342 flow [2024-06-21 16:10:17,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=342, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 16:10:17,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 16:10:17,770 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 342 flow [2024-06-21 16:10:17,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:17,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:17,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:17,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:10:17,771 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:17,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1805481747, now seen corresponding path program 1 times [2024-06-21 16:10:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:17,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146536923] [2024-06-21 16:10:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:18,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146536923] [2024-06-21 16:10:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146536923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:18,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:18,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:18,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143825036] [2024-06-21 16:10:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:18,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:18,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:18,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:18,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:18,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:18,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:19,213 INFO L124 PetriNetUnfolderBase]: 1672/2619 cut-off events. [2024-06-21 16:10:19,213 INFO L125 PetriNetUnfolderBase]: For 13592/13592 co-relation queries the response was YES. [2024-06-21 16:10:19,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9995 conditions, 2619 events. 1672/2619 cut-off events. For 13592/13592 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12930 event pairs, 591 based on Foata normal form. 4/2619 useless extension candidates. Maximal degree in co-relation 9971. Up to 2384 conditions per place. [2024-06-21 16:10:19,230 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 68 selfloop transitions, 23 changer transitions 0/96 dead transitions. [2024-06-21 16:10:19,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 96 transitions, 686 flow [2024-06-21 16:10:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 16:10:19,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-21 16:10:19,232 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 342 flow. Second operand 7 states and 141 transitions. [2024-06-21 16:10:19,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 96 transitions, 686 flow [2024-06-21 16:10:19,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 96 transitions, 642 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:19,242 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 434 flow [2024-06-21 16:10:19,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2024-06-21 16:10:19,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 16:10:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 434 flow [2024-06-21 16:10:19,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:19,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:19,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:10:19,244 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:19,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1227248831, now seen corresponding path program 2 times [2024-06-21 16:10:19,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600514461] [2024-06-21 16:10:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600514461] [2024-06-21 16:10:20,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600514461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:20,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:20,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:20,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99053376] [2024-06-21 16:10:20,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:20,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:20,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:20,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:20,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:20,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:20,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 434 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:20,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:20,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:20,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:20,621 INFO L124 PetriNetUnfolderBase]: 1683/2636 cut-off events. [2024-06-21 16:10:20,621 INFO L125 PetriNetUnfolderBase]: For 16684/16687 co-relation queries the response was YES. [2024-06-21 16:10:20,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10833 conditions, 2636 events. 1683/2636 cut-off events. For 16684/16687 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13001 event pairs, 602 based on Foata normal form. 4/2638 useless extension candidates. Maximal degree in co-relation 10807. Up to 2412 conditions per place. [2024-06-21 16:10:20,640 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 69 selfloop transitions, 26 changer transitions 0/100 dead transitions. [2024-06-21 16:10:20,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 792 flow [2024-06-21 16:10:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:10:20,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-21 16:10:20,642 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 434 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:10:20,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 792 flow [2024-06-21 16:10:20,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 766 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 16:10:20,713 INFO L231 Difference]: Finished difference. Result has 72 places, 76 transitions, 542 flow [2024-06-21 16:10:20,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=72, PETRI_TRANSITIONS=76} [2024-06-21 16:10:20,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-21 16:10:20,714 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 76 transitions, 542 flow [2024-06-21 16:10:20,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:20,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:20,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:20,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:10:20,715 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:20,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:20,715 INFO L85 PathProgramCache]: Analyzing trace with hash -813616651, now seen corresponding path program 2 times [2024-06-21 16:10:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:20,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800510447] [2024-06-21 16:10:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:20,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:21,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:21,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800510447] [2024-06-21 16:10:21,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800510447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:21,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:21,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:21,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395084583] [2024-06-21 16:10:21,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:21,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:21,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:21,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:21,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 76 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:21,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:21,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:21,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:22,134 INFO L124 PetriNetUnfolderBase]: 1705/2672 cut-off events. [2024-06-21 16:10:22,134 INFO L125 PetriNetUnfolderBase]: For 20572/20572 co-relation queries the response was YES. [2024-06-21 16:10:22,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11578 conditions, 2672 events. 1705/2672 cut-off events. For 20572/20572 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13119 event pairs, 598 based on Foata normal form. 4/2675 useless extension candidates. Maximal degree in co-relation 11549. Up to 2494 conditions per place. [2024-06-21 16:10:22,148 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 14 changer transitions 0/99 dead transitions. [2024-06-21 16:10:22,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 814 flow [2024-06-21 16:10:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:10:22,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 16:10:22,150 INFO L175 Difference]: Start difference. First operand has 72 places, 76 transitions, 542 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:10:22,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 814 flow [2024-06-21 16:10:22,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 770 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:22,170 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 572 flow [2024-06-21 16:10:22,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=572, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 16:10:22,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 16:10:22,171 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 572 flow [2024-06-21 16:10:22,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:22,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:22,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:22,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:10:22,172 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:22,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1174027177, now seen corresponding path program 3 times [2024-06-21 16:10:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:22,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368665133] [2024-06-21 16:10:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:22,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368665133] [2024-06-21 16:10:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368665133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:22,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:22,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866088496] [2024-06-21 16:10:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:23,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:23,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:23,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:23,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:23,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:23,582 INFO L124 PetriNetUnfolderBase]: 1700/2665 cut-off events. [2024-06-21 16:10:23,582 INFO L125 PetriNetUnfolderBase]: For 22965/22965 co-relation queries the response was YES. [2024-06-21 16:10:23,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11803 conditions, 2665 events. 1700/2665 cut-off events. For 22965/22965 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13167 event pairs, 598 based on Foata normal form. 2/2666 useless extension candidates. Maximal degree in co-relation 11772. Up to 2496 conditions per place. [2024-06-21 16:10:23,602 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 79 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-21 16:10:23,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 806 flow [2024-06-21 16:10:23,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-21 16:10:23,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-21 16:10:23,603 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 572 flow. Second operand 7 states and 130 transitions. [2024-06-21 16:10:23,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 806 flow [2024-06-21 16:10:23,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 98 transitions, 740 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:23,635 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 542 flow [2024-06-21 16:10:23,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-21 16:10:23,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 16:10:23,637 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 542 flow [2024-06-21 16:10:23,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:23,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:23,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:10:23,638 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 16:10:23,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:23,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1404380537, now seen corresponding path program 3 times [2024-06-21 16:10:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667986537] [2024-06-21 16:10:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:24,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:24,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667986537] [2024-06-21 16:10:24,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667986537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:24,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:24,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:24,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740013356] [2024-06-21 16:10:24,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:24,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:24,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:24,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:24,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:24,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:24,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:24,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:24,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:24,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:24,980 INFO L124 PetriNetUnfolderBase]: 1690/2651 cut-off events. [2024-06-21 16:10:24,980 INFO L125 PetriNetUnfolderBase]: For 25253/25253 co-relation queries the response was YES. [2024-06-21 16:10:24,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11856 conditions, 2651 events. 1690/2651 cut-off events. For 25253/25253 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13047 event pairs, 596 based on Foata normal form. 4/2654 useless extension candidates. Maximal degree in co-relation 11825. Up to 2446 conditions per place. [2024-06-21 16:10:24,998 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 19 changer transitions 0/100 dead transitions. [2024-06-21 16:10:24,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 100 transitions, 788 flow [2024-06-21 16:10:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:10:25,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 16:10:25,000 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 542 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:10:25,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 100 transitions, 788 flow [2024-06-21 16:10:25,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 728 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:25,030 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 528 flow [2024-06-21 16:10:25,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-21 16:10:25,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-21 16:10:25,032 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 528 flow [2024-06-21 16:10:25,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:25,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:25,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:25,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:10:25,032 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:25,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:25,033 INFO L85 PathProgramCache]: Analyzing trace with hash 875095549, now seen corresponding path program 1 times [2024-06-21 16:10:25,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:25,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646606293] [2024-06-21 16:10:25,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:25,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:25,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:25,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:25,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646606293] [2024-06-21 16:10:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646606293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:25,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:25,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:10:25,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684126870] [2024-06-21 16:10:25,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:25,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:10:25,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:10:25,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:10:25,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:25,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 528 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:25,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:25,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:25,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:26,135 INFO L124 PetriNetUnfolderBase]: 2009/3103 cut-off events. [2024-06-21 16:10:26,135 INFO L125 PetriNetUnfolderBase]: For 35849/35849 co-relation queries the response was YES. [2024-06-21 16:10:26,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14179 conditions, 3103 events. 2009/3103 cut-off events. For 35849/35849 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15210 event pairs, 833 based on Foata normal form. 1/3103 useless extension candidates. Maximal degree in co-relation 14147. Up to 2949 conditions per place. [2024-06-21 16:10:26,156 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 65 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-21 16:10:26,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 714 flow [2024-06-21 16:10:26,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:10:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:10:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-21 16:10:26,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-21 16:10:26,158 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 528 flow. Second operand 5 states and 92 transitions. [2024-06-21 16:10:26,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 714 flow [2024-06-21 16:10:26,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 90 transitions, 654 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:26,196 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 516 flow [2024-06-21 16:10:26,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=516, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-06-21 16:10:26,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 16:10:26,197 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 516 flow [2024-06-21 16:10:26,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:26,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:26,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:26,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:10:26,198 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:26,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash 131545148, now seen corresponding path program 1 times [2024-06-21 16:10:26,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:26,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127930444] [2024-06-21 16:10:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:26,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:27,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127930444] [2024-06-21 16:10:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127930444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:27,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:27,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50056566] [2024-06-21 16:10:27,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:27,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:27,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 516 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:27,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:27,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:27,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:28,086 INFO L124 PetriNetUnfolderBase]: 1803/2788 cut-off events. [2024-06-21 16:10:28,086 INFO L125 PetriNetUnfolderBase]: For 36017/36017 co-relation queries the response was YES. [2024-06-21 16:10:28,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13598 conditions, 2788 events. 1803/2788 cut-off events. For 36017/36017 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13718 event pairs, 615 based on Foata normal form. 2/2789 useless extension candidates. Maximal degree in co-relation 13565. Up to 2560 conditions per place. [2024-06-21 16:10:28,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 97 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2024-06-21 16:10:28,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 982 flow [2024-06-21 16:10:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:10:28,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-21 16:10:28,101 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 516 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:10:28,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 982 flow [2024-06-21 16:10:28,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 956 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:28,138 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 622 flow [2024-06-21 16:10:28,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=622, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-21 16:10:28,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-21 16:10:28,139 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 622 flow [2024-06-21 16:10:28,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:28,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:28,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:28,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:10:28,140 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:28,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash 131635358, now seen corresponding path program 2 times [2024-06-21 16:10:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:28,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084101848] [2024-06-21 16:10:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:29,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:29,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084101848] [2024-06-21 16:10:29,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084101848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:29,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:29,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:29,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629683730] [2024-06-21 16:10:29,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:29,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:29,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:29,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:29,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 622 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:29,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:29,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:29,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:29,896 INFO L124 PetriNetUnfolderBase]: 1798/2781 cut-off events. [2024-06-21 16:10:29,896 INFO L125 PetriNetUnfolderBase]: For 40931/40931 co-relation queries the response was YES. [2024-06-21 16:10:29,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14188 conditions, 2781 events. 1798/2781 cut-off events. For 40931/40931 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13732 event pairs, 615 based on Foata normal form. 2/2782 useless extension candidates. Maximal degree in co-relation 14154. Up to 2579 conditions per place. [2024-06-21 16:10:29,910 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 17 changer transitions 0/117 dead transitions. [2024-06-21 16:10:29,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 918 flow [2024-06-21 16:10:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:29,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:10:29,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:10:29,913 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 622 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:10:29,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 918 flow [2024-06-21 16:10:29,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 844 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:29,940 INFO L231 Difference]: Finished difference. Result has 87 places, 88 transitions, 590 flow [2024-06-21 16:10:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=590, PETRI_PLACES=87, PETRI_TRANSITIONS=88} [2024-06-21 16:10:29,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 16:10:29,941 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 88 transitions, 590 flow [2024-06-21 16:10:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:29,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:29,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:10:29,941 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:29,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:29,941 INFO L85 PathProgramCache]: Analyzing trace with hash 131635513, now seen corresponding path program 1 times [2024-06-21 16:10:29,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674815182] [2024-06-21 16:10:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:30,889 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 16:10:30,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674815182] [2024-06-21 16:10:30,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674815182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:30,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:30,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:30,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283801581] [2024-06-21 16:10:30,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:30,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:30,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:30,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:30,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:31,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:31,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 88 transitions, 590 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:31,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:31,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:31,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:31,525 INFO L124 PetriNetUnfolderBase]: 1822/2809 cut-off events. [2024-06-21 16:10:31,525 INFO L125 PetriNetUnfolderBase]: For 45995/45995 co-relation queries the response was YES. [2024-06-21 16:10:31,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14583 conditions, 2809 events. 1822/2809 cut-off events. For 45995/45995 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13809 event pairs, 609 based on Foata normal form. 4/2809 useless extension candidates. Maximal degree in co-relation 14547. Up to 2604 conditions per place. [2024-06-21 16:10:31,540 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 98 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-06-21 16:10:31,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 936 flow [2024-06-21 16:10:31,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:31,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:10:31,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:10:31,542 INFO L175 Difference]: Start difference. First operand has 87 places, 88 transitions, 590 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:10:31,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 936 flow [2024-06-21 16:10:31,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 121 transitions, 894 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:31,566 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 634 flow [2024-06-21 16:10:31,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2024-06-21 16:10:31,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-21 16:10:31,567 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 634 flow [2024-06-21 16:10:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:31,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:31,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:31,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:10:31,568 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:31,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash -609985283, now seen corresponding path program 2 times [2024-06-21 16:10:31,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701948798] [2024-06-21 16:10:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701948798] [2024-06-21 16:10:32,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701948798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:32,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:32,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:32,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418203420] [2024-06-21 16:10:32,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:32,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:32,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:32,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:32,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:32,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 634 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:32,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:32,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:32,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:33,122 INFO L124 PetriNetUnfolderBase]: 1897/2922 cut-off events. [2024-06-21 16:10:33,122 INFO L125 PetriNetUnfolderBase]: For 53040/53040 co-relation queries the response was YES. [2024-06-21 16:10:33,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15878 conditions, 2922 events. 1897/2922 cut-off events. For 53040/53040 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14501 event pairs, 593 based on Foata normal form. 4/2920 useless extension candidates. Maximal degree in co-relation 15841. Up to 2511 conditions per place. [2024-06-21 16:10:33,137 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 83 selfloop transitions, 44 changer transitions 0/133 dead transitions. [2024-06-21 16:10:33,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1246 flow [2024-06-21 16:10:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:10:33,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 16:10:33,139 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 634 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:10:33,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1246 flow [2024-06-21 16:10:33,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 133 transitions, 1184 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:33,171 INFO L231 Difference]: Finished difference. Result has 90 places, 100 transitions, 806 flow [2024-06-21 16:10:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=806, PETRI_PLACES=90, PETRI_TRANSITIONS=100} [2024-06-21 16:10:33,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-21 16:10:33,171 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 100 transitions, 806 flow [2024-06-21 16:10:33,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:33,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:33,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:10:33,172 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:33,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash -609991018, now seen corresponding path program 3 times [2024-06-21 16:10:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:33,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605737915] [2024-06-21 16:10:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:34,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605737915] [2024-06-21 16:10:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605737915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:34,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:34,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192063384] [2024-06-21 16:10:34,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:34,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:34,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:34,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:34,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:34,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 100 transitions, 806 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:34,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:34,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:34,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:35,014 INFO L124 PetriNetUnfolderBase]: 1908/2939 cut-off events. [2024-06-21 16:10:35,014 INFO L125 PetriNetUnfolderBase]: For 59541/59544 co-relation queries the response was YES. [2024-06-21 16:10:35,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16642 conditions, 2939 events. 1908/2939 cut-off events. For 59541/59544 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14572 event pairs, 626 based on Foata normal form. 4/2939 useless extension candidates. Maximal degree in co-relation 16604. Up to 2690 conditions per place. [2024-06-21 16:10:35,027 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 94 selfloop transitions, 29 changer transitions 0/129 dead transitions. [2024-06-21 16:10:35,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 129 transitions, 1164 flow [2024-06-21 16:10:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:10:35,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 16:10:35,029 INFO L175 Difference]: Start difference. First operand has 90 places, 100 transitions, 806 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:10:35,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 129 transitions, 1164 flow [2024-06-21 16:10:35,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 129 transitions, 1098 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-21 16:10:35,061 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 858 flow [2024-06-21 16:10:35,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-06-21 16:10:35,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 16:10:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 858 flow [2024-06-21 16:10:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:35,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:35,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:35,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:10:35,063 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:35,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 135354583, now seen corresponding path program 3 times [2024-06-21 16:10:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:35,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946276212] [2024-06-21 16:10:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:35,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:35,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946276212] [2024-06-21 16:10:35,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946276212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:35,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:35,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:35,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025893503] [2024-06-21 16:10:35,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:35,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:35,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:36,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:36,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 858 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:36,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:36,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:36,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:36,578 INFO L124 PetriNetUnfolderBase]: 1898/2924 cut-off events. [2024-06-21 16:10:36,578 INFO L125 PetriNetUnfolderBase]: For 64909/64909 co-relation queries the response was YES. [2024-06-21 16:10:36,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2924 events. 1898/2924 cut-off events. For 64909/64909 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14511 event pairs, 591 based on Foata normal form. 4/2922 useless extension candidates. Maximal degree in co-relation 17009. Up to 2519 conditions per place. [2024-06-21 16:10:36,595 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-06-21 16:10:36,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 135 transitions, 1280 flow [2024-06-21 16:10:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:10:36,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-21 16:10:36,597 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 858 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:10:36,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 135 transitions, 1280 flow [2024-06-21 16:10:36,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 135 transitions, 1166 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:36,633 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 838 flow [2024-06-21 16:10:36,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-21 16:10:36,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 16:10:36,634 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 838 flow [2024-06-21 16:10:36,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:36,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:36,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:36,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:10:36,635 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:36,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash 540336799, now seen corresponding path program 4 times [2024-06-21 16:10:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:36,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115207463] [2024-06-21 16:10:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115207463] [2024-06-21 16:10:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115207463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189583509] [2024-06-21 16:10:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:37,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:37,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 838 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:37,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:37,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:37,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:38,159 INFO L124 PetriNetUnfolderBase]: 1952/3007 cut-off events. [2024-06-21 16:10:38,159 INFO L125 PetriNetUnfolderBase]: For 72211/72211 co-relation queries the response was YES. [2024-06-21 16:10:38,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17928 conditions, 3007 events. 1952/3007 cut-off events. For 72211/72211 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14931 event pairs, 622 based on Foata normal form. 4/3008 useless extension candidates. Maximal degree in co-relation 17887. Up to 2699 conditions per place. [2024-06-21 16:10:38,174 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-06-21 16:10:38,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1458 flow [2024-06-21 16:10:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:10:38,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-21 16:10:38,175 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 838 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:10:38,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1458 flow [2024-06-21 16:10:38,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 139 transitions, 1342 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:38,208 INFO L231 Difference]: Finished difference. Result has 98 places, 109 transitions, 900 flow [2024-06-21 16:10:38,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=900, PETRI_PLACES=98, PETRI_TRANSITIONS=109} [2024-06-21 16:10:38,208 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-21 16:10:38,208 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 109 transitions, 900 flow [2024-06-21 16:10:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:38,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:38,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:38,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:10:38,209 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 16:10:38,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:38,209 INFO L85 PathProgramCache]: Analyzing trace with hash 593476191, now seen corresponding path program 5 times [2024-06-21 16:10:38,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:38,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54461411] [2024-06-21 16:10:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:38,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:39,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:39,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:39,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54461411] [2024-06-21 16:10:39,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54461411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:39,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:39,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60817944] [2024-06-21 16:10:39,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:39,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:39,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:39,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:39,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 109 transitions, 900 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:39,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:39,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:39,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:39,671 INFO L124 PetriNetUnfolderBase]: 1942/2993 cut-off events. [2024-06-21 16:10:39,671 INFO L125 PetriNetUnfolderBase]: For 76606/76606 co-relation queries the response was YES. [2024-06-21 16:10:39,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 2993 events. 1942/2993 cut-off events. For 76606/76606 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14880 event pairs, 620 based on Foata normal form. 4/2994 useless extension candidates. Maximal degree in co-relation 17860. Up to 2774 conditions per place. [2024-06-21 16:10:39,688 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 17 changer transitions 0/134 dead transitions. [2024-06-21 16:10:39,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 134 transitions, 1222 flow [2024-06-21 16:10:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:10:39,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 16:10:39,689 INFO L175 Difference]: Start difference. First operand has 98 places, 109 transitions, 900 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:10:39,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 134 transitions, 1222 flow [2024-06-21 16:10:39,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 1090 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:39,740 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 810 flow [2024-06-21 16:10:39,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=810, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-06-21 16:10:39,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 16:10:39,741 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 810 flow [2024-06-21 16:10:39,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:39,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:39,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:39,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:10:39,741 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:39,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash 586118961, now seen corresponding path program 6 times [2024-06-21 16:10:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:39,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138615130] [2024-06-21 16:10:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:40,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:40,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138615130] [2024-06-21 16:10:40,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138615130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:40,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:40,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:40,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005549005] [2024-06-21 16:10:40,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:40,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:40,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:40,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:40,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 810 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:40,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:40,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:40,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:41,151 INFO L124 PetriNetUnfolderBase]: 1932/2979 cut-off events. [2024-06-21 16:10:41,151 INFO L125 PetriNetUnfolderBase]: For 80227/80227 co-relation queries the response was YES. [2024-06-21 16:10:41,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17755 conditions, 2979 events. 1932/2979 cut-off events. For 80227/80227 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14838 event pairs, 613 based on Foata normal form. 4/2980 useless extension candidates. Maximal degree in co-relation 17712. Up to 2683 conditions per place. [2024-06-21 16:10:41,169 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 99 selfloop transitions, 30 changer transitions 0/135 dead transitions. [2024-06-21 16:10:41,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 1138 flow [2024-06-21 16:10:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:10:41,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 16:10:41,170 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 810 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:10:41,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 1138 flow [2024-06-21 16:10:41,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 135 transitions, 1060 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:41,228 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 800 flow [2024-06-21 16:10:41,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=800, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-06-21 16:10:41,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-21 16:10:41,229 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 800 flow [2024-06-21 16:10:41,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:41,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:41,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:10:41,230 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:41,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:41,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2035103234, now seen corresponding path program 4 times [2024-06-21 16:10:41,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:41,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927092704] [2024-06-21 16:10:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:41,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:42,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:42,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927092704] [2024-06-21 16:10:42,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927092704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:42,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:42,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:10:42,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111438977] [2024-06-21 16:10:42,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:42,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:10:42,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:10:42,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:10:42,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:42,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 800 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:42,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:42,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:42,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:43,022 INFO L124 PetriNetUnfolderBase]: 1927/2972 cut-off events. [2024-06-21 16:10:43,023 INFO L125 PetriNetUnfolderBase]: For 84764/84764 co-relation queries the response was YES. [2024-06-21 16:10:43,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17915 conditions, 2972 events. 1927/2972 cut-off events. For 84764/84764 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14766 event pairs, 623 based on Foata normal form. 2/2971 useless extension candidates. Maximal degree in co-relation 17871. Up to 2776 conditions per place. [2024-06-21 16:10:43,038 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 112 selfloop transitions, 17 changer transitions 0/135 dead transitions. [2024-06-21 16:10:43,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 135 transitions, 1168 flow [2024-06-21 16:10:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:10:43,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:10:43,039 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 800 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:10:43,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 135 transitions, 1168 flow [2024-06-21 16:10:43,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 135 transitions, 1100 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:43,084 INFO L231 Difference]: Finished difference. Result has 103 places, 112 transitions, 832 flow [2024-06-21 16:10:43,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=832, PETRI_PLACES=103, PETRI_TRANSITIONS=112} [2024-06-21 16:10:43,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 16:10:43,084 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 112 transitions, 832 flow [2024-06-21 16:10:43,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:43,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:43,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:43,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:10:43,085 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:43,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2027468802, now seen corresponding path program 1 times [2024-06-21 16:10:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754512269] [2024-06-21 16:10:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:43,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:44,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:44,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754512269] [2024-06-21 16:10:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754512269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:44,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178378745] [2024-06-21 16:10:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:44,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:10:44,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 112 transitions, 832 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:44,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:44,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:10:44,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:45,334 INFO L124 PetriNetUnfolderBase]: 2291/3466 cut-off events. [2024-06-21 16:10:45,334 INFO L125 PetriNetUnfolderBase]: For 106180/106180 co-relation queries the response was YES. [2024-06-21 16:10:45,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20921 conditions, 3466 events. 2291/3466 cut-off events. For 106180/106180 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16694 event pairs, 751 based on Foata normal form. 4/3467 useless extension candidates. Maximal degree in co-relation 20876. Up to 3280 conditions per place. [2024-06-21 16:10:45,356 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-06-21 16:10:45,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 141 transitions, 1224 flow [2024-06-21 16:10:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:10:45,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 16:10:45,358 INFO L175 Difference]: Start difference. First operand has 103 places, 112 transitions, 832 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:10:45,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 141 transitions, 1224 flow [2024-06-21 16:10:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 141 transitions, 1148 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:45,423 INFO L231 Difference]: Finished difference. Result has 106 places, 117 transitions, 869 flow [2024-06-21 16:10:45,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=869, PETRI_PLACES=106, PETRI_TRANSITIONS=117} [2024-06-21 16:10:45,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 16:10:45,424 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 117 transitions, 869 flow [2024-06-21 16:10:45,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:45,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:45,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:45,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:10:45,424 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:45,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1358159770, now seen corresponding path program 1 times [2024-06-21 16:10:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:45,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667962006] [2024-06-21 16:10:45,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667962006] [2024-06-21 16:10:46,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667962006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:46,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:46,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:46,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380166608] [2024-06-21 16:10:46,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:46,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:46,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:46,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:46,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:46,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:46,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 117 transitions, 869 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:46,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:46,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:46,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:46,800 INFO L124 PetriNetUnfolderBase]: 2136/3280 cut-off events. [2024-06-21 16:10:46,800 INFO L125 PetriNetUnfolderBase]: For 111817/111827 co-relation queries the response was YES. [2024-06-21 16:10:46,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20343 conditions, 3280 events. 2136/3280 cut-off events. For 111817/111827 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16021 event pairs, 782 based on Foata normal form. 11/3273 useless extension candidates. Maximal degree in co-relation 20296. Up to 3111 conditions per place. [2024-06-21 16:10:46,819 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 99 selfloop transitions, 11 changer transitions 0/131 dead transitions. [2024-06-21 16:10:46,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 131 transitions, 1141 flow [2024-06-21 16:10:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:10:46,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:10:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-21 16:10:46,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:10:46,820 INFO L175 Difference]: Start difference. First operand has 106 places, 117 transitions, 869 flow. Second operand 6 states and 108 transitions. [2024-06-21 16:10:46,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 131 transitions, 1141 flow [2024-06-21 16:10:46,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 131 transitions, 1072 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:46,881 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 860 flow [2024-06-21 16:10:46,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=860, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-21 16:10:46,881 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-21 16:10:46,882 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 860 flow [2024-06-21 16:10:46,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:46,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:46,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:46,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:10:46,882 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:46,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1847999588, now seen corresponding path program 1 times [2024-06-21 16:10:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:46,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571913123] [2024-06-21 16:10:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:46,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:48,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:48,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571913123] [2024-06-21 16:10:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571913123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:48,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:48,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023493323] [2024-06-21 16:10:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:48,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:48,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:48,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 860 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:48,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:48,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:48,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:49,120 INFO L124 PetriNetUnfolderBase]: 2190/3365 cut-off events. [2024-06-21 16:10:49,120 INFO L125 PetriNetUnfolderBase]: For 118494/118494 co-relation queries the response was YES. [2024-06-21 16:10:49,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21625 conditions, 3365 events. 2190/3365 cut-off events. For 118494/118494 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16843 event pairs, 561 based on Foata normal form. 4/3361 useless extension candidates. Maximal degree in co-relation 21577. Up to 3034 conditions per place. [2024-06-21 16:10:49,142 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 133 selfloop transitions, 28 changer transitions 0/168 dead transitions. [2024-06-21 16:10:49,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 168 transitions, 1496 flow [2024-06-21 16:10:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 16:10:49,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 16:10:49,144 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 860 flow. Second operand 10 states and 194 transitions. [2024-06-21 16:10:49,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 168 transitions, 1496 flow [2024-06-21 16:10:49,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 168 transitions, 1458 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:10:49,235 INFO L231 Difference]: Finished difference. Result has 113 places, 124 transitions, 989 flow [2024-06-21 16:10:49,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=989, PETRI_PLACES=113, PETRI_TRANSITIONS=124} [2024-06-21 16:10:49,236 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-21 16:10:49,236 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 124 transitions, 989 flow [2024-06-21 16:10:49,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:49,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:49,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:49,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:10:49,237 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:49,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash -217066792, now seen corresponding path program 2 times [2024-06-21 16:10:49,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:49,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080504238] [2024-06-21 16:10:49,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:49,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:50,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:50,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080504238] [2024-06-21 16:10:50,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080504238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:50,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:50,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:50,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639793709] [2024-06-21 16:10:50,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:50,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:50,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:50,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:50,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:50,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:50,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 124 transitions, 989 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:50,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:50,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:50,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:51,298 INFO L124 PetriNetUnfolderBase]: 2207/3392 cut-off events. [2024-06-21 16:10:51,299 INFO L125 PetriNetUnfolderBase]: For 128439/128439 co-relation queries the response was YES. [2024-06-21 16:10:51,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22354 conditions, 3392 events. 2207/3392 cut-off events. For 128439/128439 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16974 event pairs, 686 based on Foata normal form. 4/3388 useless extension candidates. Maximal degree in co-relation 22305. Up to 3125 conditions per place. [2024-06-21 16:10:51,319 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 135 selfloop transitions, 25 changer transitions 0/167 dead transitions. [2024-06-21 16:10:51,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 167 transitions, 1467 flow [2024-06-21 16:10:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:51,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:10:51,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 16:10:51,321 INFO L175 Difference]: Start difference. First operand has 113 places, 124 transitions, 989 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:10:51,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 167 transitions, 1467 flow [2024-06-21 16:10:51,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 167 transitions, 1361 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:51,394 INFO L231 Difference]: Finished difference. Result has 117 places, 126 transitions, 998 flow [2024-06-21 16:10:51,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=998, PETRI_PLACES=117, PETRI_TRANSITIONS=126} [2024-06-21 16:10:51,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-21 16:10:51,395 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 126 transitions, 998 flow [2024-06-21 16:10:51,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:51,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:51,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:51,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:10:51,395 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:51,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash -217066668, now seen corresponding path program 1 times [2024-06-21 16:10:51,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:51,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155217616] [2024-06-21 16:10:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:51,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155217616] [2024-06-21 16:10:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155217616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:52,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:52,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:52,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699636069] [2024-06-21 16:10:52,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:52,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:52,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:52,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:52,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:52,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 126 transitions, 998 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:52,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:52,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:52,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:53,466 INFO L124 PetriNetUnfolderBase]: 2290/3508 cut-off events. [2024-06-21 16:10:53,466 INFO L125 PetriNetUnfolderBase]: For 142037/142037 co-relation queries the response was YES. [2024-06-21 16:10:53,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23410 conditions, 3508 events. 2290/3508 cut-off events. For 142037/142037 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17631 event pairs, 684 based on Foata normal form. 4/3500 useless extension candidates. Maximal degree in co-relation 23359. Up to 3192 conditions per place. [2024-06-21 16:10:53,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 140 selfloop transitions, 30 changer transitions 0/177 dead transitions. [2024-06-21 16:10:53,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 177 transitions, 1680 flow [2024-06-21 16:10:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:10:53,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-21 16:10:53,486 INFO L175 Difference]: Start difference. First operand has 117 places, 126 transitions, 998 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:10:53,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 177 transitions, 1680 flow [2024-06-21 16:10:53,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 177 transitions, 1603 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:53,573 INFO L231 Difference]: Finished difference. Result has 119 places, 132 transitions, 1107 flow [2024-06-21 16:10:53,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1107, PETRI_PLACES=119, PETRI_TRANSITIONS=132} [2024-06-21 16:10:53,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 16:10:53,573 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 132 transitions, 1107 flow [2024-06-21 16:10:53,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:53,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:53,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:10:53,574 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:53,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash -214270158, now seen corresponding path program 2 times [2024-06-21 16:10:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219828448] [2024-06-21 16:10:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:54,682 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 16:10:54,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:54,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219828448] [2024-06-21 16:10:54,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219828448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:54,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:54,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:54,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571804253] [2024-06-21 16:10:54,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:54,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:54,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:54,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:54,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:54,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:54,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 132 transitions, 1107 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:54,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:54,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:54,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:55,702 INFO L124 PetriNetUnfolderBase]: 2279/3493 cut-off events. [2024-06-21 16:10:55,702 INFO L125 PetriNetUnfolderBase]: For 149911/149911 co-relation queries the response was YES. [2024-06-21 16:10:55,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23786 conditions, 3493 events. 2279/3493 cut-off events. For 149911/149911 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17526 event pairs, 682 based on Foata normal form. 4/3486 useless extension candidates. Maximal degree in co-relation 23734. Up to 3223 conditions per place. [2024-06-21 16:10:55,728 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 23 changer transitions 0/171 dead transitions. [2024-06-21 16:10:55,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1537 flow [2024-06-21 16:10:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:10:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:10:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 16:10:55,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 16:10:55,729 INFO L175 Difference]: Start difference. First operand has 119 places, 132 transitions, 1107 flow. Second operand 10 states and 189 transitions. [2024-06-21 16:10:55,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1537 flow [2024-06-21 16:10:55,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1423 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:55,839 INFO L231 Difference]: Finished difference. Result has 123 places, 132 transitions, 1048 flow [2024-06-21 16:10:55,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1048, PETRI_PLACES=123, PETRI_TRANSITIONS=132} [2024-06-21 16:10:55,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 16:10:55,839 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 132 transitions, 1048 flow [2024-06-21 16:10:55,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:55,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:55,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:55,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:10:55,840 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:55,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:55,840 INFO L85 PathProgramCache]: Analyzing trace with hash -214270282, now seen corresponding path program 3 times [2024-06-21 16:10:55,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:55,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147228693] [2024-06-21 16:10:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:55,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:57,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147228693] [2024-06-21 16:10:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147228693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:57,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:57,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:57,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967015634] [2024-06-21 16:10:57,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:57,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:57,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:57,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 132 transitions, 1048 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:57,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:57,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:57,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:57,975 INFO L124 PetriNetUnfolderBase]: 2250/3452 cut-off events. [2024-06-21 16:10:57,975 INFO L125 PetriNetUnfolderBase]: For 154161/154161 co-relation queries the response was YES. [2024-06-21 16:10:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23514 conditions, 3452 events. 2250/3452 cut-off events. For 154161/154161 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17342 event pairs, 682 based on Foata normal form. 4/3446 useless extension candidates. Maximal degree in co-relation 23460. Up to 3208 conditions per place. [2024-06-21 16:10:58,001 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 19 changer transitions 0/166 dead transitions. [2024-06-21 16:10:58,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 166 transitions, 1452 flow [2024-06-21 16:10:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:58,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:10:58,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 16:10:58,002 INFO L175 Difference]: Start difference. First operand has 123 places, 132 transitions, 1048 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:10:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 166 transitions, 1452 flow [2024-06-21 16:10:58,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 1362 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 16:10:58,094 INFO L231 Difference]: Finished difference. Result has 123 places, 132 transitions, 1003 flow [2024-06-21 16:10:58,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1003, PETRI_PLACES=123, PETRI_TRANSITIONS=132} [2024-06-21 16:10:58,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 16:10:58,095 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 132 transitions, 1003 flow [2024-06-21 16:10:58,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:58,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:58,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:58,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:10:58,096 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 16:10:58,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1729673704, now seen corresponding path program 3 times [2024-06-21 16:10:58,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:58,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769934852] [2024-06-21 16:10:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:59,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:59,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769934852] [2024-06-21 16:10:59,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769934852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:59,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:59,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:10:59,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247320087] [2024-06-21 16:10:59,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:10:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:59,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:10:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:10:59,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:10:59,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 132 transitions, 1003 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:59,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:59,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:10:59,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:00,079 INFO L124 PetriNetUnfolderBase]: 2272/3484 cut-off events. [2024-06-21 16:11:00,079 INFO L125 PetriNetUnfolderBase]: For 163383/163383 co-relation queries the response was YES. [2024-06-21 16:11:00,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23889 conditions, 3484 events. 2272/3484 cut-off events. For 163383/163383 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17515 event pairs, 646 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 23834. Up to 3008 conditions per place. [2024-06-21 16:11:00,103 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 107 selfloop transitions, 55 changer transitions 0/169 dead transitions. [2024-06-21 16:11:00,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 169 transitions, 1481 flow [2024-06-21 16:11:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:11:00,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-21 16:11:00,105 INFO L175 Difference]: Start difference. First operand has 123 places, 132 transitions, 1003 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:11:00,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 169 transitions, 1481 flow [2024-06-21 16:11:00,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 169 transitions, 1431 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:00,193 INFO L231 Difference]: Finished difference. Result has 124 places, 135 transitions, 1139 flow [2024-06-21 16:11:00,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1139, PETRI_PLACES=124, PETRI_TRANSITIONS=135} [2024-06-21 16:11:00,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-21 16:11:00,194 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 135 transitions, 1139 flow [2024-06-21 16:11:00,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:00,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:00,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:11:00,194 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:00,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -98974338, now seen corresponding path program 4 times [2024-06-21 16:11:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400107519] [2024-06-21 16:11:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:00,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:01,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:01,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400107519] [2024-06-21 16:11:01,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400107519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:01,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:01,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:01,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241602459] [2024-06-21 16:11:01,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:01,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:01,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:01,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:01,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:01,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:01,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 135 transitions, 1139 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:01,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:01,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:01,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:02,092 INFO L124 PetriNetUnfolderBase]: 2288/3523 cut-off events. [2024-06-21 16:11:02,092 INFO L125 PetriNetUnfolderBase]: For 175498/175498 co-relation queries the response was YES. [2024-06-21 16:11:02,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24913 conditions, 3523 events. 2288/3523 cut-off events. For 175498/175498 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17831 event pairs, 626 based on Foata normal form. 4/3521 useless extension candidates. Maximal degree in co-relation 24857. Up to 3001 conditions per place. [2024-06-21 16:11:02,117 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 116 selfloop transitions, 60 changer transitions 0/183 dead transitions. [2024-06-21 16:11:02,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 183 transitions, 1869 flow [2024-06-21 16:11:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:02,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:11:02,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 16:11:02,118 INFO L175 Difference]: Start difference. First operand has 124 places, 135 transitions, 1139 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:11:02,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 183 transitions, 1869 flow [2024-06-21 16:11:02,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 183 transitions, 1707 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:02,241 INFO L231 Difference]: Finished difference. Result has 128 places, 141 transitions, 1276 flow [2024-06-21 16:11:02,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1276, PETRI_PLACES=128, PETRI_TRANSITIONS=141} [2024-06-21 16:11:02,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 16:11:02,241 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 141 transitions, 1276 flow [2024-06-21 16:11:02,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:02,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:02,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:02,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:11:02,242 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:02,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:02,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1729851334, now seen corresponding path program 5 times [2024-06-21 16:11:02,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:02,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430580957] [2024-06-21 16:11:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:03,487 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 16:11:03,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430580957] [2024-06-21 16:11:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430580957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:03,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171114235] [2024-06-21 16:11:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:03,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:03,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 141 transitions, 1276 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:03,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:03,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:03,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:04,347 INFO L124 PetriNetUnfolderBase]: 2310/3555 cut-off events. [2024-06-21 16:11:04,347 INFO L125 PetriNetUnfolderBase]: For 188052/188052 co-relation queries the response was YES. [2024-06-21 16:11:04,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25945 conditions, 3555 events. 2310/3555 cut-off events. For 188052/188052 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18061 event pairs, 624 based on Foata normal form. 4/3553 useless extension candidates. Maximal degree in co-relation 25887. Up to 3016 conditions per place. [2024-06-21 16:11:04,373 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 114 selfloop transitions, 63 changer transitions 0/184 dead transitions. [2024-06-21 16:11:04,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 184 transitions, 1814 flow [2024-06-21 16:11:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:11:04,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 16:11:04,377 INFO L175 Difference]: Start difference. First operand has 128 places, 141 transitions, 1276 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:11:04,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 184 transitions, 1814 flow [2024-06-21 16:11:04,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 1712 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:04,540 INFO L231 Difference]: Finished difference. Result has 133 places, 144 transitions, 1392 flow [2024-06-21 16:11:04,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1392, PETRI_PLACES=133, PETRI_TRANSITIONS=144} [2024-06-21 16:11:04,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 16:11:04,540 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 144 transitions, 1392 flow [2024-06-21 16:11:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:04,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:04,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:04,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:11:04,541 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:04,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:04,541 INFO L85 PathProgramCache]: Analyzing trace with hash -547078092, now seen corresponding path program 4 times [2024-06-21 16:11:04,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:04,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50483170] [2024-06-21 16:11:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:04,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:05,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50483170] [2024-06-21 16:11:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50483170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:05,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:05,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051421359] [2024-06-21 16:11:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:05,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:05,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:05,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 144 transitions, 1392 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:05,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:05,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:05,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:06,467 INFO L124 PetriNetUnfolderBase]: 2337/3600 cut-off events. [2024-06-21 16:11:06,468 INFO L125 PetriNetUnfolderBase]: For 202281/202284 co-relation queries the response was YES. [2024-06-21 16:11:06,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27201 conditions, 3600 events. 2337/3600 cut-off events. For 202281/202284 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18324 event pairs, 631 based on Foata normal form. 6/3597 useless extension candidates. Maximal degree in co-relation 27141. Up to 3298 conditions per place. [2024-06-21 16:11:06,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 139 selfloop transitions, 31 changer transitions 0/177 dead transitions. [2024-06-21 16:11:06,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 177 transitions, 1872 flow [2024-06-21 16:11:06,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:06,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:11:06,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:11:06,496 INFO L175 Difference]: Start difference. First operand has 133 places, 144 transitions, 1392 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:11:06,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 177 transitions, 1872 flow [2024-06-21 16:11:06,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 177 transitions, 1686 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:06,606 INFO L231 Difference]: Finished difference. Result has 134 places, 146 transitions, 1341 flow [2024-06-21 16:11:06,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1341, PETRI_PLACES=134, PETRI_TRANSITIONS=146} [2024-06-21 16:11:06,606 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 16:11:06,607 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 146 transitions, 1341 flow [2024-06-21 16:11:06,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:06,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:06,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:11:06,607 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:06,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:06,607 INFO L85 PathProgramCache]: Analyzing trace with hash -859113572, now seen corresponding path program 1 times [2024-06-21 16:11:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462649460] [2024-06-21 16:11:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:07,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:07,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462649460] [2024-06-21 16:11:07,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462649460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:07,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:07,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:07,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059750103] [2024-06-21 16:11:07,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:07,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:07,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:07,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:07,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 146 transitions, 1341 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:07,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:07,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:07,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:07,856 INFO L124 PetriNetUnfolderBase]: 2358/3625 cut-off events. [2024-06-21 16:11:07,857 INFO L125 PetriNetUnfolderBase]: For 202904/202914 co-relation queries the response was YES. [2024-06-21 16:11:07,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26755 conditions, 3625 events. 2358/3625 cut-off events. For 202904/202914 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18172 event pairs, 764 based on Foata normal form. 10/3624 useless extension candidates. Maximal degree in co-relation 26694. Up to 3399 conditions per place. [2024-06-21 16:11:07,889 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 18 changer transitions 0/168 dead transitions. [2024-06-21 16:11:07,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 168 transitions, 1801 flow [2024-06-21 16:11:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:11:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:11:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-21 16:11:07,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 16:11:07,890 INFO L175 Difference]: Start difference. First operand has 134 places, 146 transitions, 1341 flow. Second operand 6 states and 115 transitions. [2024-06-21 16:11:07,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 168 transitions, 1801 flow [2024-06-21 16:11:08,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 168 transitions, 1684 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:08,015 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 1337 flow [2024-06-21 16:11:08,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1337, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2024-06-21 16:11:08,015 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 16:11:08,016 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 1337 flow [2024-06-21 16:11:08,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:08,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:08,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:08,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:11:08,016 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 16:11:08,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:08,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1336487856, now seen corresponding path program 6 times [2024-06-21 16:11:08,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:08,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530177106] [2024-06-21 16:11:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:08,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:08,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:09,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:09,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530177106] [2024-06-21 16:11:09,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530177106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:09,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287707278] [2024-06-21 16:11:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:09,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:09,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 1337 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:09,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:09,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:09,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:10,006 INFO L124 PetriNetUnfolderBase]: 2383/3659 cut-off events. [2024-06-21 16:11:10,006 INFO L125 PetriNetUnfolderBase]: For 212536/212546 co-relation queries the response was YES. [2024-06-21 16:11:10,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27755 conditions, 3659 events. 2383/3659 cut-off events. For 212536/212546 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18600 event pairs, 621 based on Foata normal form. 4/3653 useless extension candidates. Maximal degree in co-relation 27693. Up to 3290 conditions per place. [2024-06-21 16:11:10,038 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 143 selfloop transitions, 34 changer transitions 0/186 dead transitions. [2024-06-21 16:11:10,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 186 transitions, 1855 flow [2024-06-21 16:11:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:11:10,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 16:11:10,039 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 1337 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:11:10,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 186 transitions, 1855 flow [2024-06-21 16:11:10,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 1821 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 16:11:10,182 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1465 flow [2024-06-21 16:11:10,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1303, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1465, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-21 16:11:10,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-21 16:11:10,183 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1465 flow [2024-06-21 16:11:10,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:10,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:10,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:10,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:11:10,183 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 16:11:10,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:10,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1572966830, now seen corresponding path program 1 times [2024-06-21 16:11:10,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:10,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347765234] [2024-06-21 16:11:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:10,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:11,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:11,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347765234] [2024-06-21 16:11:11,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347765234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:11,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:11,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:11,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802574137] [2024-06-21 16:11:11,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:11,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:11,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:11,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:11,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:11,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:11:11,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1465 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:11,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:11,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:11:11,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:12,237 INFO L124 PetriNetUnfolderBase]: 2596/3914 cut-off events. [2024-06-21 16:11:12,237 INFO L125 PetriNetUnfolderBase]: For 227008/227008 co-relation queries the response was YES. [2024-06-21 16:11:12,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29768 conditions, 3914 events. 2596/3914 cut-off events. For 227008/227008 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18979 event pairs, 731 based on Foata normal form. 2/3915 useless extension candidates. Maximal degree in co-relation 29704. Up to 3712 conditions per place. [2024-06-21 16:11:12,267 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 156 selfloop transitions, 22 changer transitions 0/185 dead transitions. [2024-06-21 16:11:12,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 185 transitions, 1978 flow [2024-06-21 16:11:12,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:11:12,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:11:12,268 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1465 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:11:12,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 185 transitions, 1978 flow [2024-06-21 16:11:12,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 185 transitions, 1836 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:12,455 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1486 flow [2024-06-21 16:11:12,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1486, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-21 16:11:12,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 16:11:12,456 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1486 flow [2024-06-21 16:11:12,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:12,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:12,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:12,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:11:12,457 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 16:11:12,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash 996248582, now seen corresponding path program 7 times [2024-06-21 16:11:12,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:12,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562817476] [2024-06-21 16:11:12,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:12,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:13,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:13,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562817476] [2024-06-21 16:11:13,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562817476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:13,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:13,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:13,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436783651] [2024-06-21 16:11:13,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:13,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:13,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:13,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:13,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:13,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:13,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1486 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:13,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:13,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:13,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:14,296 INFO L124 PetriNetUnfolderBase]: 2416/3704 cut-off events. [2024-06-21 16:11:14,296 INFO L125 PetriNetUnfolderBase]: For 234545/234557 co-relation queries the response was YES. [2024-06-21 16:11:14,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28838 conditions, 3704 events. 2416/3704 cut-off events. For 234545/234557 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18833 event pairs, 627 based on Foata normal form. 6/3700 useless extension candidates. Maximal degree in co-relation 28773. Up to 3379 conditions per place. [2024-06-21 16:11:14,326 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 160 selfloop transitions, 25 changer transitions 0/194 dead transitions. [2024-06-21 16:11:14,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 194 transitions, 2022 flow [2024-06-21 16:11:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:11:14,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:11:14,328 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1486 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:11:14,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 194 transitions, 2022 flow [2024-06-21 16:11:14,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 194 transitions, 1942 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:14,508 INFO L231 Difference]: Finished difference. Result has 144 places, 164 transitions, 1556 flow [2024-06-21 16:11:14,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1556, PETRI_PLACES=144, PETRI_TRANSITIONS=164} [2024-06-21 16:11:14,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-21 16:11:14,509 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 164 transitions, 1556 flow [2024-06-21 16:11:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:14,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:14,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:14,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:11:14,509 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:14,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash 66664796, now seen corresponding path program 8 times [2024-06-21 16:11:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:14,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155699952] [2024-06-21 16:11:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:15,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:15,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155699952] [2024-06-21 16:11:15,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155699952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:15,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:15,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:15,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459616519] [2024-06-21 16:11:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:15,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:15,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:15,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:15,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:15,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 164 transitions, 1556 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:15,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:15,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:16,292 INFO L124 PetriNetUnfolderBase]: 2438/3741 cut-off events. [2024-06-21 16:11:16,292 INFO L125 PetriNetUnfolderBase]: For 247417/247431 co-relation queries the response was YES. [2024-06-21 16:11:16,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29775 conditions, 3741 events. 2438/3741 cut-off events. For 247417/247431 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19091 event pairs, 610 based on Foata normal form. 4/3735 useless extension candidates. Maximal degree in co-relation 29709. Up to 3319 conditions per place. [2024-06-21 16:11:16,324 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 145 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-21 16:11:16,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 200 transitions, 2268 flow [2024-06-21 16:11:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:11:16,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 16:11:16,326 INFO L175 Difference]: Start difference. First operand has 144 places, 164 transitions, 1556 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:11:16,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 200 transitions, 2268 flow [2024-06-21 16:11:16,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 200 transitions, 2142 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:16,533 INFO L231 Difference]: Finished difference. Result has 146 places, 167 transitions, 1628 flow [2024-06-21 16:11:16,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1430, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1628, PETRI_PLACES=146, PETRI_TRANSITIONS=167} [2024-06-21 16:11:16,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 16:11:16,534 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 167 transitions, 1628 flow [2024-06-21 16:11:16,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:16,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:16,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:16,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:11:16,535 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:16,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:16,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1564212324, now seen corresponding path program 5 times [2024-06-21 16:11:16,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:16,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208023087] [2024-06-21 16:11:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:17,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:17,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208023087] [2024-06-21 16:11:17,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208023087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:17,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:17,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:17,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104269365] [2024-06-21 16:11:17,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:17,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:17,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:17,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:17,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 167 transitions, 1628 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:17,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:17,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:17,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:18,410 INFO L124 PetriNetUnfolderBase]: 2430/3729 cut-off events. [2024-06-21 16:11:18,410 INFO L125 PetriNetUnfolderBase]: For 256315/256331 co-relation queries the response was YES. [2024-06-21 16:11:18,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29936 conditions, 3729 events. 2430/3729 cut-off events. For 256315/256331 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18997 event pairs, 635 based on Foata normal form. 4/3723 useless extension candidates. Maximal degree in co-relation 29869. Up to 3478 conditions per place. [2024-06-21 16:11:18,439 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 19 changer transitions 0/197 dead transitions. [2024-06-21 16:11:18,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 197 transitions, 2146 flow [2024-06-21 16:11:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:11:18,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-21 16:11:18,440 INFO L175 Difference]: Start difference. First operand has 146 places, 167 transitions, 1628 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:11:18,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 197 transitions, 2146 flow [2024-06-21 16:11:18,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 197 transitions, 1942 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:18,690 INFO L231 Difference]: Finished difference. Result has 148 places, 169 transitions, 1545 flow [2024-06-21 16:11:18,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1545, PETRI_PLACES=148, PETRI_TRANSITIONS=169} [2024-06-21 16:11:18,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-21 16:11:18,691 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 169 transitions, 1545 flow [2024-06-21 16:11:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:18,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:18,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:18,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:11:18,692 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:18,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:18,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1564212200, now seen corresponding path program 9 times [2024-06-21 16:11:18,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:18,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57127761] [2024-06-21 16:11:18,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:18,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57127761] [2024-06-21 16:11:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57127761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:19,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:19,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:11:19,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949894777] [2024-06-21 16:11:19,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:19,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:11:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:19,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:11:19,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:11:19,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:19,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 169 transitions, 1545 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:19,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:19,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:19,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:20,745 INFO L124 PetriNetUnfolderBase]: 2437/3739 cut-off events. [2024-06-21 16:11:20,745 INFO L125 PetriNetUnfolderBase]: For 265422/265422 co-relation queries the response was YES. [2024-06-21 16:11:20,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30027 conditions, 3739 events. 2437/3739 cut-off events. For 265422/265422 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19043 event pairs, 609 based on Foata normal form. 4/3735 useless extension candidates. Maximal degree in co-relation 29959. Up to 3261 conditions per place. [2024-06-21 16:11:20,775 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 149 selfloop transitions, 50 changer transitions 0/208 dead transitions. [2024-06-21 16:11:20,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 208 transitions, 2141 flow [2024-06-21 16:11:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:20,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:11:20,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:11:20,776 INFO L175 Difference]: Start difference. First operand has 148 places, 169 transitions, 1545 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:11:20,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 208 transitions, 2141 flow [2024-06-21 16:11:20,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 208 transitions, 2038 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:20,993 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 1660 flow [2024-06-21 16:11:20,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1660, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-06-21 16:11:20,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-21 16:11:20,994 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 1660 flow [2024-06-21 16:11:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:20,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:20,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:20,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:11:20,995 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:20,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -846733412, now seen corresponding path program 2 times [2024-06-21 16:11:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587767224] [2024-06-21 16:11:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:21,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:21,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587767224] [2024-06-21 16:11:21,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587767224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:21,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:21,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127022940] [2024-06-21 16:11:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:21,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:21,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:21,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:21,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 1660 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:21,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:21,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:21,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:22,225 INFO L124 PetriNetUnfolderBase]: 2498/3816 cut-off events. [2024-06-21 16:11:22,225 INFO L125 PetriNetUnfolderBase]: For 283466/283488 co-relation queries the response was YES. [2024-06-21 16:11:22,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30927 conditions, 3816 events. 2498/3816 cut-off events. For 283466/283488 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19052 event pairs, 784 based on Foata normal form. 10/3804 useless extension candidates. Maximal degree in co-relation 30858. Up to 3593 conditions per place. [2024-06-21 16:11:22,257 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 142 selfloop transitions, 11 changer transitions 0/181 dead transitions. [2024-06-21 16:11:22,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 181 transitions, 1988 flow [2024-06-21 16:11:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:11:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:11:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 16:11:22,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:11:22,258 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 1660 flow. Second operand 6 states and 106 transitions. [2024-06-21 16:11:22,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 181 transitions, 1988 flow [2024-06-21 16:11:22,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 181 transitions, 1782 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:22,429 INFO L231 Difference]: Finished difference. Result has 149 places, 172 transitions, 1482 flow [2024-06-21 16:11:22,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1482, PETRI_PLACES=149, PETRI_TRANSITIONS=172} [2024-06-21 16:11:22,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 16:11:22,429 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 172 transitions, 1482 flow [2024-06-21 16:11:22,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:22,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:22,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:22,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:11:22,430 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:22,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:22,430 INFO L85 PathProgramCache]: Analyzing trace with hash -853393700, now seen corresponding path program 1 times [2024-06-21 16:11:22,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:22,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247547425] [2024-06-21 16:11:22,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:22,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:22,993 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 16:11:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:22,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247547425] [2024-06-21 16:11:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247547425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:22,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:22,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:22,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226544358] [2024-06-21 16:11:22,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:22,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:23,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:11:23,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 172 transitions, 1482 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:23,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:11:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:23,787 INFO L124 PetriNetUnfolderBase]: 2820/4165 cut-off events. [2024-06-21 16:11:23,787 INFO L125 PetriNetUnfolderBase]: For 274561/274561 co-relation queries the response was YES. [2024-06-21 16:11:23,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32093 conditions, 4165 events. 2820/4165 cut-off events. For 274561/274561 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19629 event pairs, 814 based on Foata normal form. 1/4165 useless extension candidates. Maximal degree in co-relation 32023. Up to 4134 conditions per place. [2024-06-21 16:11:23,820 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 172 selfloop transitions, 16 changer transitions 0/191 dead transitions. [2024-06-21 16:11:23,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 191 transitions, 2058 flow [2024-06-21 16:11:23,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:11:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:11:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 16:11:23,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:11:23,824 INFO L175 Difference]: Start difference. First operand has 149 places, 172 transitions, 1482 flow. Second operand 6 states and 102 transitions. [2024-06-21 16:11:23,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 191 transitions, 2058 flow [2024-06-21 16:11:23,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 191 transitions, 2020 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:24,001 INFO L231 Difference]: Finished difference. Result has 150 places, 178 transitions, 1572 flow [2024-06-21 16:11:24,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1444, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1572, PETRI_PLACES=150, PETRI_TRANSITIONS=178} [2024-06-21 16:11:24,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 16:11:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 178 transitions, 1572 flow [2024-06-21 16:11:24,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:24,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:24,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:24,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:11:24,003 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 16:11:24,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash -359644610, now seen corresponding path program 2 times [2024-06-21 16:11:24,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:24,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858972432] [2024-06-21 16:11:24,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:24,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:24,552 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 16:11:24,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:24,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858972432] [2024-06-21 16:11:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858972432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:24,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:24,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493405338] [2024-06-21 16:11:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:24,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:24,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:11:24,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 178 transitions, 1572 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:24,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:24,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:11:24,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:25,325 INFO L124 PetriNetUnfolderBase]: 2817/4162 cut-off events. [2024-06-21 16:11:25,325 INFO L125 PetriNetUnfolderBase]: For 286193/286196 co-relation queries the response was YES. [2024-06-21 16:11:25,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32618 conditions, 4162 events. 2817/4162 cut-off events. For 286193/286196 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19650 event pairs, 817 based on Foata normal form. 3/4163 useless extension candidates. Maximal degree in co-relation 32547. Up to 4131 conditions per place. [2024-06-21 16:11:25,358 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 168 selfloop transitions, 16 changer transitions 0/187 dead transitions. [2024-06-21 16:11:25,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 187 transitions, 1962 flow [2024-06-21 16:11:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:11:25,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:11:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 16:11:25,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 16:11:25,359 INFO L175 Difference]: Start difference. First operand has 150 places, 178 transitions, 1572 flow. Second operand 6 states and 98 transitions. [2024-06-21 16:11:25,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 187 transitions, 1962 flow [2024-06-21 16:11:25,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 187 transitions, 1890 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 16:11:25,626 INFO L231 Difference]: Finished difference. Result has 154 places, 178 transitions, 1538 flow [2024-06-21 16:11:25,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1538, PETRI_PLACES=154, PETRI_TRANSITIONS=178} [2024-06-21 16:11:25,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 16:11:25,626 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 178 transitions, 1538 flow [2024-06-21 16:11:25,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:25,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:11:25,627 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:25,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1453411340, now seen corresponding path program 1 times [2024-06-21 16:11:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:25,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990314655] [2024-06-21 16:11:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:25,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:26,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:26,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990314655] [2024-06-21 16:11:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990314655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:26,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:26,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:26,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623225304] [2024-06-21 16:11:26,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:26,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:26,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:26,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:26,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:26,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:26,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 178 transitions, 1538 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:26,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:26,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:26,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:27,894 INFO L124 PetriNetUnfolderBase]: 2715/4152 cut-off events. [2024-06-21 16:11:27,894 INFO L125 PetriNetUnfolderBase]: For 348784/348784 co-relation queries the response was YES. [2024-06-21 16:11:27,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 4152 events. 2715/4152 cut-off events. For 348784/348784 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 21780 event pairs, 565 based on Foata normal form. 16/4142 useless extension candidates. Maximal degree in co-relation 35136. Up to 3428 conditions per place. [2024-06-21 16:11:27,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 192 selfloop transitions, 36 changer transitions 0/239 dead transitions. [2024-06-21 16:11:27,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 239 transitions, 2494 flow [2024-06-21 16:11:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:11:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:11:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-21 16:11:27,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-21 16:11:27,938 INFO L175 Difference]: Start difference. First operand has 154 places, 178 transitions, 1538 flow. Second operand 11 states and 222 transitions. [2024-06-21 16:11:27,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 239 transitions, 2494 flow [2024-06-21 16:11:28,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 239 transitions, 2450 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:28,279 INFO L231 Difference]: Finished difference. Result has 160 places, 180 transitions, 1682 flow [2024-06-21 16:11:28,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1682, PETRI_PLACES=160, PETRI_TRANSITIONS=180} [2024-06-21 16:11:28,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 16:11:28,279 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 180 transitions, 1682 flow [2024-06-21 16:11:28,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:28,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:11:28,280 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:28,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1451533670, now seen corresponding path program 2 times [2024-06-21 16:11:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:28,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328705008] [2024-06-21 16:11:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:28,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:29,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328705008] [2024-06-21 16:11:29,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328705008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:29,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:29,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:29,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142324126] [2024-06-21 16:11:29,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:29,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:29,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:29,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:29,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:29,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 180 transitions, 1682 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:29,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:29,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:29,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:30,863 INFO L124 PetriNetUnfolderBase]: 2734/4213 cut-off events. [2024-06-21 16:11:30,863 INFO L125 PetriNetUnfolderBase]: For 365213/365213 co-relation queries the response was YES. [2024-06-21 16:11:30,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35677 conditions, 4213 events. 2734/4213 cut-off events. For 365213/365213 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22401 event pairs, 712 based on Foata normal form. 24/4217 useless extension candidates. Maximal degree in co-relation 35603. Up to 3720 conditions per place. [2024-06-21 16:11:30,897 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 193 selfloop transitions, 33 changer transitions 0/237 dead transitions. [2024-06-21 16:11:30,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 237 transitions, 2390 flow [2024-06-21 16:11:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:11:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:11:30,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-21 16:11:30,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-21 16:11:30,899 INFO L175 Difference]: Start difference. First operand has 160 places, 180 transitions, 1682 flow. Second operand 12 states and 230 transitions. [2024-06-21 16:11:30,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 237 transitions, 2390 flow [2024-06-21 16:11:31,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 237 transitions, 2318 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:31,122 INFO L231 Difference]: Finished difference. Result has 165 places, 181 transitions, 1744 flow [2024-06-21 16:11:31,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1744, PETRI_PLACES=165, PETRI_TRANSITIONS=181} [2024-06-21 16:11:31,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-21 16:11:31,123 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 181 transitions, 1744 flow [2024-06-21 16:11:31,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:31,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:31,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:11:31,123 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:31,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1451537390, now seen corresponding path program 3 times [2024-06-21 16:11:31,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:31,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581858583] [2024-06-21 16:11:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:31,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:32,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581858583] [2024-06-21 16:11:32,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581858583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:32,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:32,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772346728] [2024-06-21 16:11:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:32,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:32,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:32,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:32,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:32,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:32,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 181 transitions, 1744 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:32,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:32,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:32,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:33,540 INFO L124 PetriNetUnfolderBase]: 2706/4169 cut-off events. [2024-06-21 16:11:33,540 INFO L125 PetriNetUnfolderBase]: For 355404/355404 co-relation queries the response was YES. [2024-06-21 16:11:33,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34822 conditions, 4169 events. 2706/4169 cut-off events. For 355404/355404 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22069 event pairs, 672 based on Foata normal form. 16/4165 useless extension candidates. Maximal degree in co-relation 34746. Up to 3538 conditions per place. [2024-06-21 16:11:33,578 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 35 changer transitions 0/237 dead transitions. [2024-06-21 16:11:33,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 237 transitions, 2418 flow [2024-06-21 16:11:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:11:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:11:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-21 16:11:33,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47186147186147187 [2024-06-21 16:11:33,579 INFO L175 Difference]: Start difference. First operand has 165 places, 181 transitions, 1744 flow. Second operand 11 states and 218 transitions. [2024-06-21 16:11:33,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 237 transitions, 2418 flow [2024-06-21 16:11:33,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 237 transitions, 2334 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 16:11:33,969 INFO L231 Difference]: Finished difference. Result has 166 places, 181 transitions, 1737 flow [2024-06-21 16:11:33,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1660, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1737, PETRI_PLACES=166, PETRI_TRANSITIONS=181} [2024-06-21 16:11:33,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 16:11:33,970 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 181 transitions, 1737 flow [2024-06-21 16:11:33,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:33,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:33,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:11:33,970 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:33,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1232126114, now seen corresponding path program 4 times [2024-06-21 16:11:33,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:33,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378596544] [2024-06-21 16:11:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:33,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:35,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:35,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378596544] [2024-06-21 16:11:35,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378596544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:35,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:35,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:35,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773668775] [2024-06-21 16:11:35,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:35,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:35,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:35,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:35,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:35,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 181 transitions, 1737 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:35,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:35,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:35,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:36,327 INFO L124 PetriNetUnfolderBase]: 2783/4312 cut-off events. [2024-06-21 16:11:36,327 INFO L125 PetriNetUnfolderBase]: For 377984/377984 co-relation queries the response was YES. [2024-06-21 16:11:36,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36010 conditions, 4312 events. 2783/4312 cut-off events. For 377984/377984 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23128 event pairs, 640 based on Foata normal form. 24/4330 useless extension candidates. Maximal degree in co-relation 35933. Up to 3624 conditions per place. [2024-06-21 16:11:36,368 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 58 changer transitions 0/226 dead transitions. [2024-06-21 16:11:36,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 226 transitions, 2395 flow [2024-06-21 16:11:36,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:11:36,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-21 16:11:36,370 INFO L175 Difference]: Start difference. First operand has 166 places, 181 transitions, 1737 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:11:36,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 226 transitions, 2395 flow [2024-06-21 16:11:36,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 226 transitions, 2294 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 16:11:36,703 INFO L231 Difference]: Finished difference. Result has 166 places, 182 transitions, 1818 flow [2024-06-21 16:11:36,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1636, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1818, PETRI_PLACES=166, PETRI_TRANSITIONS=182} [2024-06-21 16:11:36,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 16:11:36,703 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 182 transitions, 1818 flow [2024-06-21 16:11:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:36,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:36,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:36,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:11:36,704 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:36,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2080060875, now seen corresponding path program 1 times [2024-06-21 16:11:36,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:36,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656475266] [2024-06-21 16:11:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:36,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656475266] [2024-06-21 16:11:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656475266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743809909] [2024-06-21 16:11:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:38,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:11:38,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 182 transitions, 1818 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:38,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:38,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:11:38,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:38,999 INFO L124 PetriNetUnfolderBase]: 3071/4667 cut-off events. [2024-06-21 16:11:38,999 INFO L125 PetriNetUnfolderBase]: For 378567/378570 co-relation queries the response was YES. [2024-06-21 16:11:39,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38095 conditions, 4667 events. 3071/4667 cut-off events. For 378567/378570 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 23963 event pairs, 804 based on Foata normal form. 4/4665 useless extension candidates. Maximal degree in co-relation 38017. Up to 4352 conditions per place. [2024-06-21 16:11:39,038 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 36 changer transitions 0/221 dead transitions. [2024-06-21 16:11:39,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 221 transitions, 2420 flow [2024-06-21 16:11:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:39,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:11:39,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:11:39,040 INFO L175 Difference]: Start difference. First operand has 166 places, 182 transitions, 1818 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:11:39,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 221 transitions, 2420 flow [2024-06-21 16:11:39,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 221 transitions, 2286 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:39,468 INFO L231 Difference]: Finished difference. Result has 168 places, 187 transitions, 1861 flow [2024-06-21 16:11:39,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1861, PETRI_PLACES=168, PETRI_TRANSITIONS=187} [2024-06-21 16:11:39,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 16:11:39,469 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 187 transitions, 1861 flow [2024-06-21 16:11:39,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:39,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:39,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:39,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:11:39,469 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:39,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2085638736, now seen corresponding path program 5 times [2024-06-21 16:11:39,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:39,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083518728] [2024-06-21 16:11:39,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:39,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:39,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:40,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:40,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083518728] [2024-06-21 16:11:40,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083518728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:40,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:40,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:40,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400023245] [2024-06-21 16:11:40,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:40,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:40,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:40,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:40,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 187 transitions, 1861 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:40,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:40,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:41,684 INFO L124 PetriNetUnfolderBase]: 2873/4462 cut-off events. [2024-06-21 16:11:41,684 INFO L125 PetriNetUnfolderBase]: For 407058/407064 co-relation queries the response was YES. [2024-06-21 16:11:41,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37767 conditions, 4462 events. 2873/4462 cut-off events. For 407058/407064 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 24351 event pairs, 707 based on Foata normal form. 20/4470 useless extension candidates. Maximal degree in co-relation 37687. Up to 3766 conditions per place. [2024-06-21 16:11:41,726 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 156 selfloop transitions, 66 changer transitions 0/234 dead transitions. [2024-06-21 16:11:41,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 234 transitions, 2713 flow [2024-06-21 16:11:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 16:11:41,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-21 16:11:41,728 INFO L175 Difference]: Start difference. First operand has 168 places, 187 transitions, 1861 flow. Second operand 10 states and 203 transitions. [2024-06-21 16:11:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 234 transitions, 2713 flow [2024-06-21 16:11:42,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 234 transitions, 2582 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:42,030 INFO L231 Difference]: Finished difference. Result has 172 places, 188 transitions, 1931 flow [2024-06-21 16:11:42,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1931, PETRI_PLACES=172, PETRI_TRANSITIONS=188} [2024-06-21 16:11:42,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 16:11:42,031 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 188 transitions, 1931 flow [2024-06-21 16:11:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:42,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:42,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:42,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:11:42,031 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:42,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1226619584, now seen corresponding path program 6 times [2024-06-21 16:11:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281699447] [2024-06-21 16:11:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:43,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281699447] [2024-06-21 16:11:43,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281699447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:43,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:43,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:43,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488371893] [2024-06-21 16:11:43,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:43,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:43,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:43,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:43,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:43,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 188 transitions, 1931 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:43,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:43,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:43,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:44,227 INFO L124 PetriNetUnfolderBase]: 2923/4558 cut-off events. [2024-06-21 16:11:44,227 INFO L125 PetriNetUnfolderBase]: For 425862/425868 co-relation queries the response was YES. [2024-06-21 16:11:44,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38804 conditions, 4558 events. 2923/4558 cut-off events. For 425862/425868 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25056 event pairs, 720 based on Foata normal form. 20/4561 useless extension candidates. Maximal degree in co-relation 38723. Up to 3802 conditions per place. [2024-06-21 16:11:44,367 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 149 selfloop transitions, 74 changer transitions 0/235 dead transitions. [2024-06-21 16:11:44,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 235 transitions, 2791 flow [2024-06-21 16:11:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:44,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:44,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 16:11:44,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-21 16:11:44,368 INFO L175 Difference]: Start difference. First operand has 172 places, 188 transitions, 1931 flow. Second operand 10 states and 204 transitions. [2024-06-21 16:11:44,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 235 transitions, 2791 flow [2024-06-21 16:11:44,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 235 transitions, 2634 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:44,747 INFO L231 Difference]: Finished difference. Result has 174 places, 189 transitions, 1993 flow [2024-06-21 16:11:44,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1993, PETRI_PLACES=174, PETRI_TRANSITIONS=189} [2024-06-21 16:11:44,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-21 16:11:44,748 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 189 transitions, 1993 flow [2024-06-21 16:11:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:44,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:44,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:44,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:11:44,749 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:44,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:44,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1226615864, now seen corresponding path program 7 times [2024-06-21 16:11:44,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:44,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012855318] [2024-06-21 16:11:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:44,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:45,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012855318] [2024-06-21 16:11:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012855318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124982116] [2024-06-21 16:11:45,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:46,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 189 transitions, 1993 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:47,127 INFO L124 PetriNetUnfolderBase]: 3116/4879 cut-off events. [2024-06-21 16:11:47,127 INFO L125 PetriNetUnfolderBase]: For 470851/470851 co-relation queries the response was YES. [2024-06-21 16:11:47,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42508 conditions, 4879 events. 3116/4879 cut-off events. For 470851/470851 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 27306 event pairs, 694 based on Foata normal form. 16/4881 useless extension candidates. Maximal degree in co-relation 42426. Up to 3617 conditions per place. [2024-06-21 16:11:47,173 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 72 changer transitions 0/241 dead transitions. [2024-06-21 16:11:47,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 241 transitions, 2979 flow [2024-06-21 16:11:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:11:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:11:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:11:47,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-21 16:11:47,175 INFO L175 Difference]: Start difference. First operand has 174 places, 189 transitions, 1993 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:11:47,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 241 transitions, 2979 flow [2024-06-21 16:11:47,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 241 transitions, 2790 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-21 16:11:47,567 INFO L231 Difference]: Finished difference. Result has 175 places, 191 transitions, 2084 flow [2024-06-21 16:11:47,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2084, PETRI_PLACES=175, PETRI_TRANSITIONS=191} [2024-06-21 16:11:47,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-21 16:11:47,568 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 191 transitions, 2084 flow [2024-06-21 16:11:47,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:47,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:47,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:11:47,568 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:47,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash -862715429, now seen corresponding path program 1 times [2024-06-21 16:11:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132584707] [2024-06-21 16:11:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:48,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132584707] [2024-06-21 16:11:48,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132584707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:48,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:48,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:48,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295354245] [2024-06-21 16:11:48,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:48,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:48,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:48,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:48,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:48,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:11:48,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 191 transitions, 2084 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:48,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:48,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:11:48,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:49,257 INFO L124 PetriNetUnfolderBase]: 3261/5064 cut-off events. [2024-06-21 16:11:49,257 INFO L125 PetriNetUnfolderBase]: For 486151/486183 co-relation queries the response was YES. [2024-06-21 16:11:49,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43679 conditions, 5064 events. 3261/5064 cut-off events. For 486151/486183 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27852 event pairs, 955 based on Foata normal form. 14/5037 useless extension candidates. Maximal degree in co-relation 43597. Up to 4743 conditions per place. [2024-06-21 16:11:49,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 164 selfloop transitions, 25 changer transitions 0/221 dead transitions. [2024-06-21 16:11:49,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 221 transitions, 2698 flow [2024-06-21 16:11:49,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:49,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 16:11:49,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 16:11:49,309 INFO L175 Difference]: Start difference. First operand has 175 places, 191 transitions, 2084 flow. Second operand 7 states and 135 transitions. [2024-06-21 16:11:49,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 221 transitions, 2698 flow [2024-06-21 16:11:49,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 221 transitions, 2574 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:11:49,895 INFO L231 Difference]: Finished difference. Result has 177 places, 200 transitions, 2118 flow [2024-06-21 16:11:49,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2118, PETRI_PLACES=177, PETRI_TRANSITIONS=200} [2024-06-21 16:11:49,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 16:11:49,896 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 200 transitions, 2118 flow [2024-06-21 16:11:49,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:49,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:49,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:49,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:11:49,897 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:49,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash -633763275, now seen corresponding path program 2 times [2024-06-21 16:11:49,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:49,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948677539] [2024-06-21 16:11:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:51,025 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 16:11:51,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:51,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948677539] [2024-06-21 16:11:51,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948677539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:51,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:51,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:51,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444137644] [2024-06-21 16:11:51,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:51,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:51,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:51,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:11:51,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 200 transitions, 2118 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:51,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:51,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:11:51,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:52,277 INFO L124 PetriNetUnfolderBase]: 3492/5346 cut-off events. [2024-06-21 16:11:52,277 INFO L125 PetriNetUnfolderBase]: For 487687/487687 co-relation queries the response was YES. [2024-06-21 16:11:52,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45849 conditions, 5346 events. 3492/5346 cut-off events. For 487687/487687 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28624 event pairs, 931 based on Foata normal form. 4/5349 useless extension candidates. Maximal degree in co-relation 45764. Up to 5131 conditions per place. [2024-06-21 16:11:52,323 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 20 changer transitions 0/231 dead transitions. [2024-06-21 16:11:52,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 231 transitions, 2710 flow [2024-06-21 16:11:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:11:52,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:11:52,324 INFO L175 Difference]: Start difference. First operand has 177 places, 200 transitions, 2118 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:11:52,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 231 transitions, 2710 flow [2024-06-21 16:11:52,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 231 transitions, 2673 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-21 16:11:52,639 INFO L231 Difference]: Finished difference. Result has 184 places, 202 transitions, 2208 flow [2024-06-21 16:11:52,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2208, PETRI_PLACES=184, PETRI_TRANSITIONS=202} [2024-06-21 16:11:52,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-21 16:11:52,640 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 202 transitions, 2208 flow [2024-06-21 16:11:52,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:52,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:52,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:11:52,640 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:52,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash -634089984, now seen corresponding path program 1 times [2024-06-21 16:11:52,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:52,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770569365] [2024-06-21 16:11:52,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:52,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:53,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:53,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770569365] [2024-06-21 16:11:53,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770569365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:53,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:53,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:53,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190635972] [2024-06-21 16:11:53,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:53,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:53,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:53,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:53,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:54,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:11:54,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 202 transitions, 2208 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:54,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:54,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:11:54,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:55,120 INFO L124 PetriNetUnfolderBase]: 3509/5371 cut-off events. [2024-06-21 16:11:55,120 INFO L125 PetriNetUnfolderBase]: For 501150/501150 co-relation queries the response was YES. [2024-06-21 16:11:55,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46327 conditions, 5371 events. 3509/5371 cut-off events. For 501150/501150 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28802 event pairs, 976 based on Foata normal form. 2/5372 useless extension candidates. Maximal degree in co-relation 46239. Up to 5138 conditions per place. [2024-06-21 16:11:55,172 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 197 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-21 16:11:55,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 234 transitions, 2763 flow [2024-06-21 16:11:55,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:55,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:55,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:11:55,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 16:11:55,174 INFO L175 Difference]: Start difference. First operand has 184 places, 202 transitions, 2208 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:11:55,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 234 transitions, 2763 flow [2024-06-21 16:11:55,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 234 transitions, 2614 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-21 16:11:55,846 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 2162 flow [2024-06-21 16:11:55,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2162, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2024-06-21 16:11:55,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-21 16:11:55,847 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 2162 flow [2024-06-21 16:11:55,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:55,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:55,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:55,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:11:55,847 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:55,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash 625211957, now seen corresponding path program 3 times [2024-06-21 16:11:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:55,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913495457] [2024-06-21 16:11:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:55,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:57,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:57,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913495457] [2024-06-21 16:11:57,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913495457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:57,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:57,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:57,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637255689] [2024-06-21 16:11:57,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:57,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:57,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:57,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:11:57,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:11:57,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 2162 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:57,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:57,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:11:57,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:58,206 INFO L124 PetriNetUnfolderBase]: 3526/5398 cut-off events. [2024-06-21 16:11:58,207 INFO L125 PetriNetUnfolderBase]: For 520012/520012 co-relation queries the response was YES. [2024-06-21 16:11:58,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46739 conditions, 5398 events. 3526/5398 cut-off events. For 520012/520012 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29034 event pairs, 942 based on Foata normal form. 4/5401 useless extension candidates. Maximal degree in co-relation 46650. Up to 5134 conditions per place. [2024-06-21 16:11:58,256 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 203 selfloop transitions, 29 changer transitions 0/241 dead transitions. [2024-06-21 16:11:58,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 241 transitions, 2813 flow [2024-06-21 16:11:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:11:58,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:11:58,258 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 2162 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:11:58,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 241 transitions, 2813 flow [2024-06-21 16:11:58,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 241 transitions, 2740 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:11:58,755 INFO L231 Difference]: Finished difference. Result has 188 places, 210 transitions, 2267 flow [2024-06-21 16:11:58,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2267, PETRI_PLACES=188, PETRI_TRANSITIONS=210} [2024-06-21 16:11:58,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-21 16:11:58,756 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 210 transitions, 2267 flow [2024-06-21 16:11:58,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:58,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:58,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:11:58,756 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:58,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1518548508, now seen corresponding path program 8 times [2024-06-21 16:11:58,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:58,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339478399] [2024-06-21 16:11:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:59,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:59,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339478399] [2024-06-21 16:11:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339478399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:59,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:59,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:11:59,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183124294] [2024-06-21 16:11:59,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:59,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:11:59,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:59,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:11:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:00,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:00,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 210 transitions, 2267 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:00,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:00,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:00,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:01,115 INFO L124 PetriNetUnfolderBase]: 3318/5195 cut-off events. [2024-06-21 16:12:01,116 INFO L125 PetriNetUnfolderBase]: For 575166/575166 co-relation queries the response was YES. [2024-06-21 16:12:01,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46894 conditions, 5195 events. 3318/5195 cut-off events. For 575166/575166 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29432 event pairs, 823 based on Foata normal form. 24/5213 useless extension candidates. Maximal degree in co-relation 46803. Up to 4610 conditions per place. [2024-06-21 16:12:01,172 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 197 selfloop transitions, 42 changer transitions 0/252 dead transitions. [2024-06-21 16:12:01,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 252 transitions, 2981 flow [2024-06-21 16:12:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:01,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:12:01,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 16:12:01,173 INFO L175 Difference]: Start difference. First operand has 188 places, 210 transitions, 2267 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:12:01,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 252 transitions, 2981 flow [2024-06-21 16:12:01,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 252 transitions, 2848 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:01,784 INFO L231 Difference]: Finished difference. Result has 192 places, 211 transitions, 2298 flow [2024-06-21 16:12:01,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2298, PETRI_PLACES=192, PETRI_TRANSITIONS=211} [2024-06-21 16:12:01,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-21 16:12:01,785 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 211 transitions, 2298 flow [2024-06-21 16:12:01,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:01,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:01,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:12:01,786 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:01,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash -643286475, now seen corresponding path program 4 times [2024-06-21 16:12:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276140057] [2024-06-21 16:12:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:01,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:02,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:02,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276140057] [2024-06-21 16:12:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276140057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:02,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871469093] [2024-06-21 16:12:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:02,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:03,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:12:03,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 211 transitions, 2298 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:03,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:03,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:12:03,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:04,117 INFO L124 PetriNetUnfolderBase]: 3652/5604 cut-off events. [2024-06-21 16:12:04,117 INFO L125 PetriNetUnfolderBase]: For 572711/572711 co-relation queries the response was YES. [2024-06-21 16:12:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49734 conditions, 5604 events. 3652/5604 cut-off events. For 572711/572711 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30475 event pairs, 975 based on Foata normal form. 4/5607 useless extension candidates. Maximal degree in co-relation 49642. Up to 5403 conditions per place. [2024-06-21 16:12:04,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 19 changer transitions 0/242 dead transitions. [2024-06-21 16:12:04,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 242 transitions, 2924 flow [2024-06-21 16:12:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:12:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:12:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:12:04,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 16:12:04,170 INFO L175 Difference]: Start difference. First operand has 192 places, 211 transitions, 2298 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:12:04,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 242 transitions, 2924 flow [2024-06-21 16:12:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 242 transitions, 2812 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:04,709 INFO L231 Difference]: Finished difference. Result has 193 places, 213 transitions, 2321 flow [2024-06-21 16:12:04,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2321, PETRI_PLACES=193, PETRI_TRANSITIONS=213} [2024-06-21 16:12:04,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-21 16:12:04,710 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 213 transitions, 2321 flow [2024-06-21 16:12:04,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:04,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:04,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:04,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:12:04,711 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:04,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:04,711 INFO L85 PathProgramCache]: Analyzing trace with hash -634089705, now seen corresponding path program 5 times [2024-06-21 16:12:04,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:04,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522658915] [2024-06-21 16:12:04,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:04,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:05,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:05,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522658915] [2024-06-21 16:12:05,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522658915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:05,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:05,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:05,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233029666] [2024-06-21 16:12:05,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:05,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:05,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:05,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:05,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:06,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:12:06,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 213 transitions, 2321 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:06,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:06,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:12:06,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:07,154 INFO L124 PetriNetUnfolderBase]: 3669/5631 cut-off events. [2024-06-21 16:12:07,154 INFO L125 PetriNetUnfolderBase]: For 584088/584088 co-relation queries the response was YES. [2024-06-21 16:12:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49914 conditions, 5631 events. 3669/5631 cut-off events. For 584088/584088 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 30653 event pairs, 1006 based on Foata normal form. 4/5634 useless extension candidates. Maximal degree in co-relation 49821. Up to 5394 conditions per place. [2024-06-21 16:12:07,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 209 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-21 16:12:07,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 244 transitions, 2955 flow [2024-06-21 16:12:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:12:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:12:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:12:07,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 16:12:07,220 INFO L175 Difference]: Start difference. First operand has 193 places, 213 transitions, 2321 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:12:07,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 244 transitions, 2955 flow [2024-06-21 16:12:07,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 244 transitions, 2834 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:07,904 INFO L231 Difference]: Finished difference. Result has 195 places, 215 transitions, 2356 flow [2024-06-21 16:12:07,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2356, PETRI_PLACES=195, PETRI_TRANSITIONS=215} [2024-06-21 16:12:07,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 16:12:07,905 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 215 transitions, 2356 flow [2024-06-21 16:12:07,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:07,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:07,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:07,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:12:07,906 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:07,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:07,906 INFO L85 PathProgramCache]: Analyzing trace with hash -900002466, now seen corresponding path program 9 times [2024-06-21 16:12:07,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:07,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126802817] [2024-06-21 16:12:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:07,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126802817] [2024-06-21 16:12:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126802817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:08,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:08,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:08,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453435455] [2024-06-21 16:12:08,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:08,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:08,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:09,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:09,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 215 transitions, 2356 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:09,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:09,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:10,386 INFO L124 PetriNetUnfolderBase]: 3414/5355 cut-off events. [2024-06-21 16:12:10,386 INFO L125 PetriNetUnfolderBase]: For 632775/632775 co-relation queries the response was YES. [2024-06-21 16:12:10,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48763 conditions, 5355 events. 3414/5355 cut-off events. For 632775/632775 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30601 event pairs, 841 based on Foata normal form. 26/5380 useless extension candidates. Maximal degree in co-relation 48669. Up to 4787 conditions per place. [2024-06-21 16:12:10,449 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 205 selfloop transitions, 40 changer transitions 0/258 dead transitions. [2024-06-21 16:12:10,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 258 transitions, 3188 flow [2024-06-21 16:12:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:10,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 16:12:10,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 16:12:10,450 INFO L175 Difference]: Start difference. First operand has 195 places, 215 transitions, 2356 flow. Second operand 10 states and 190 transitions. [2024-06-21 16:12:10,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 258 transitions, 3188 flow [2024-06-21 16:12:11,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 258 transitions, 3048 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:11,019 INFO L231 Difference]: Finished difference. Result has 199 places, 219 transitions, 2522 flow [2024-06-21 16:12:11,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2522, PETRI_PLACES=199, PETRI_TRANSITIONS=219} [2024-06-21 16:12:11,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 16:12:11,020 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 219 transitions, 2522 flow [2024-06-21 16:12:11,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:11,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:11,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:11,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:12:11,020 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:11,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash 619634096, now seen corresponding path program 10 times [2024-06-21 16:12:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:11,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940141458] [2024-06-21 16:12:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940141458] [2024-06-21 16:12:12,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940141458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:12,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:12,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782336063] [2024-06-21 16:12:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:12,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:12,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 219 transitions, 2522 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:12,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:12,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:12,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:13,455 INFO L124 PetriNetUnfolderBase]: 3506/5517 cut-off events. [2024-06-21 16:12:13,455 INFO L125 PetriNetUnfolderBase]: For 664310/664310 co-relation queries the response was YES. [2024-06-21 16:12:13,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50839 conditions, 5517 events. 3506/5517 cut-off events. For 664310/664310 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31901 event pairs, 851 based on Foata normal form. 24/5540 useless extension candidates. Maximal degree in co-relation 50743. Up to 4922 conditions per place. [2024-06-21 16:12:13,518 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 204 selfloop transitions, 44 changer transitions 0/261 dead transitions. [2024-06-21 16:12:13,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 261 transitions, 3264 flow [2024-06-21 16:12:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-21 16:12:13,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 16:12:13,520 INFO L175 Difference]: Start difference. First operand has 199 places, 219 transitions, 2522 flow. Second operand 10 states and 192 transitions. [2024-06-21 16:12:13,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 261 transitions, 3264 flow [2024-06-21 16:12:14,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 261 transitions, 3072 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:14,344 INFO L231 Difference]: Finished difference. Result has 203 places, 220 transitions, 2504 flow [2024-06-21 16:12:14,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2504, PETRI_PLACES=203, PETRI_TRANSITIONS=220} [2024-06-21 16:12:14,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 16:12:14,345 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 220 transitions, 2504 flow [2024-06-21 16:12:14,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:14,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:14,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:14,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:12:14,345 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:14,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:14,346 INFO L85 PathProgramCache]: Analyzing trace with hash -899786985, now seen corresponding path program 6 times [2024-06-21 16:12:14,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:14,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962689362] [2024-06-21 16:12:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:14,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:15,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:15,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962689362] [2024-06-21 16:12:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962689362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:15,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:15,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:15,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409041846] [2024-06-21 16:12:15,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:15,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:15,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:15,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:12:15,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 220 transitions, 2504 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:15,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:15,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:12:15,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:16,764 INFO L124 PetriNetUnfolderBase]: 3857/5943 cut-off events. [2024-06-21 16:12:16,765 INFO L125 PetriNetUnfolderBase]: For 650068/650068 co-relation queries the response was YES. [2024-06-21 16:12:16,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53397 conditions, 5943 events. 3857/5943 cut-off events. For 650068/650068 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 33016 event pairs, 1024 based on Foata normal form. 4/5946 useless extension candidates. Maximal degree in co-relation 53299. Up to 5715 conditions per place. [2024-06-21 16:12:16,832 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 222 selfloop transitions, 24 changer transitions 0/255 dead transitions. [2024-06-21 16:12:16,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 255 transitions, 3201 flow [2024-06-21 16:12:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:12:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:12:16,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:12:16,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 16:12:16,833 INFO L175 Difference]: Start difference. First operand has 203 places, 220 transitions, 2504 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:12:16,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 255 transitions, 3201 flow [2024-06-21 16:12:17,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 255 transitions, 3075 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:17,797 INFO L231 Difference]: Finished difference. Result has 205 places, 225 transitions, 2574 flow [2024-06-21 16:12:17,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2382, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2574, PETRI_PLACES=205, PETRI_TRANSITIONS=225} [2024-06-21 16:12:17,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 16:12:17,798 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 225 transitions, 2574 flow [2024-06-21 16:12:17,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:17,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:17,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:17,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:12:17,799 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:17,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:17,799 INFO L85 PathProgramCache]: Analyzing trace with hash 619486226, now seen corresponding path program 11 times [2024-06-21 16:12:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:17,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729974666] [2024-06-21 16:12:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:17,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:19,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:19,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729974666] [2024-06-21 16:12:19,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729974666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:19,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:19,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:19,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285969736] [2024-06-21 16:12:19,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:19,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:19,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:19,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:19,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:19,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 225 transitions, 2574 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:19,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:19,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:19,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:20,373 INFO L124 PetriNetUnfolderBase]: 3707/5855 cut-off events. [2024-06-21 16:12:20,373 INFO L125 PetriNetUnfolderBase]: For 710698/710698 co-relation queries the response was YES. [2024-06-21 16:12:20,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54571 conditions, 5855 events. 3707/5855 cut-off events. For 710698/710698 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34403 event pairs, 860 based on Foata normal form. 16/5865 useless extension candidates. Maximal degree in co-relation 54471. Up to 4543 conditions per place. [2024-06-21 16:12:20,434 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 198 selfloop transitions, 62 changer transitions 0/274 dead transitions. [2024-06-21 16:12:20,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 274 transitions, 3727 flow [2024-06-21 16:12:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 16:12:20,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2024-06-21 16:12:20,436 INFO L175 Difference]: Start difference. First operand has 205 places, 225 transitions, 2574 flow. Second operand 10 states and 197 transitions. [2024-06-21 16:12:20,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 274 transitions, 3727 flow [2024-06-21 16:12:21,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 3582 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:21,405 INFO L231 Difference]: Finished difference. Result has 210 places, 228 transitions, 2777 flow [2024-06-21 16:12:21,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2777, PETRI_PLACES=210, PETRI_TRANSITIONS=228} [2024-06-21 16:12:21,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 16:12:21,405 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 228 transitions, 2777 flow [2024-06-21 16:12:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:21,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:21,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:12:21,406 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:21,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2066465442, now seen corresponding path program 12 times [2024-06-21 16:12:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001438622] [2024-06-21 16:12:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:22,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:22,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001438622] [2024-06-21 16:12:22,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001438622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:22,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:22,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:12:22,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124017458] [2024-06-21 16:12:22,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:22,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:12:22,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:22,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:12:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:12:22,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:22,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 228 transitions, 2777 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:22,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:22,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:22,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:23,961 INFO L124 PetriNetUnfolderBase]: 3728/5898 cut-off events. [2024-06-21 16:12:23,961 INFO L125 PetriNetUnfolderBase]: For 731098/731098 co-relation queries the response was YES. [2024-06-21 16:12:23,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55186 conditions, 5898 events. 3728/5898 cut-off events. For 731098/731098 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34756 event pairs, 901 based on Foata normal form. 20/5912 useless extension candidates. Maximal degree in co-relation 55084. Up to 5189 conditions per place. [2024-06-21 16:12:24,018 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 68 changer transitions 0/269 dead transitions. [2024-06-21 16:12:24,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 269 transitions, 3522 flow [2024-06-21 16:12:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:12:24,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:12:24,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 16:12:24,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 16:12:24,019 INFO L175 Difference]: Start difference. First operand has 210 places, 228 transitions, 2777 flow. Second operand 10 states and 193 transitions. [2024-06-21 16:12:24,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 269 transitions, 3522 flow [2024-06-21 16:12:25,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 269 transitions, 3379 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:25,108 INFO L231 Difference]: Finished difference. Result has 214 places, 229 transitions, 2862 flow [2024-06-21 16:12:25,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2862, PETRI_PLACES=214, PETRI_TRANSITIONS=229} [2024-06-21 16:12:25,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 16:12:25,109 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 229 transitions, 2862 flow [2024-06-21 16:12:25,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:25,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:25,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:25,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:12:25,109 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 16:12:25,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -851602859, now seen corresponding path program 2 times [2024-06-21 16:12:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818669779] [2024-06-21 16:12:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:25,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:25,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818669779] [2024-06-21 16:12:25,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818669779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:25,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:25,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:25,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587478287] [2024-06-21 16:12:25,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:25,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:25,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:25,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:25,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 229 transitions, 2862 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:25,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:25,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:25,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:27,158 INFO L124 PetriNetUnfolderBase]: 3857/6074 cut-off events. [2024-06-21 16:12:27,159 INFO L125 PetriNetUnfolderBase]: For 718515/718580 co-relation queries the response was YES. [2024-06-21 16:12:27,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56201 conditions, 6074 events. 3857/6074 cut-off events. For 718515/718580 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35470 event pairs, 1115 based on Foata normal form. 4/6023 useless extension candidates. Maximal degree in co-relation 56097. Up to 5778 conditions per place. [2024-06-21 16:12:27,220 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 14 changer transitions 0/244 dead transitions. [2024-06-21 16:12:27,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 244 transitions, 3344 flow [2024-06-21 16:12:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:12:27,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 16:12:27,221 INFO L175 Difference]: Start difference. First operand has 214 places, 229 transitions, 2862 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:12:27,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 244 transitions, 3344 flow [2024-06-21 16:12:28,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 244 transitions, 3157 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 16:12:28,118 INFO L231 Difference]: Finished difference. Result has 212 places, 232 transitions, 2757 flow [2024-06-21 16:12:28,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2675, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2757, PETRI_PLACES=212, PETRI_TRANSITIONS=232} [2024-06-21 16:12:28,118 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 16:12:28,118 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 232 transitions, 2757 flow [2024-06-21 16:12:28,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:28,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:28,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:28,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:12:28,119 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:28,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash -478930469, now seen corresponding path program 3 times [2024-06-21 16:12:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:28,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358065887] [2024-06-21 16:12:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:28,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358065887] [2024-06-21 16:12:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358065887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:28,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:28,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975973898] [2024-06-21 16:12:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:28,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:28,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:12:28,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 232 transitions, 2757 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:28,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:28,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:12:28,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:29,990 INFO L124 PetriNetUnfolderBase]: 3845/6056 cut-off events. [2024-06-21 16:12:29,990 INFO L125 PetriNetUnfolderBase]: For 711390/711435 co-relation queries the response was YES. [2024-06-21 16:12:30,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55127 conditions, 6056 events. 3845/6056 cut-off events. For 711390/711435 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35347 event pairs, 1110 based on Foata normal form. 3/6007 useless extension candidates. Maximal degree in co-relation 55023. Up to 5751 conditions per place. [2024-06-21 16:12:30,054 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 19 changer transitions 0/246 dead transitions. [2024-06-21 16:12:30,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 246 transitions, 3207 flow [2024-06-21 16:12:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:30,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:12:30,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:12:30,055 INFO L175 Difference]: Start difference. First operand has 212 places, 232 transitions, 2757 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:12:30,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 246 transitions, 3207 flow [2024-06-21 16:12:31,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 246 transitions, 3133 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:12:31,296 INFO L231 Difference]: Finished difference. Result has 214 places, 232 transitions, 2727 flow [2024-06-21 16:12:31,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2727, PETRI_PLACES=214, PETRI_TRANSITIONS=232} [2024-06-21 16:12:31,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-21 16:12:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 2727 flow [2024-06-21 16:12:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:31,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:31,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:31,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:12:31,297 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:31,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:31,298 INFO L85 PathProgramCache]: Analyzing trace with hash -685405194, now seen corresponding path program 1 times [2024-06-21 16:12:31,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:31,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6752781] [2024-06-21 16:12:31,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:31,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:31,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:31,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6752781] [2024-06-21 16:12:31,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6752781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:31,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:31,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:31,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015623879] [2024-06-21 16:12:31,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:31,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:31,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:31,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:32,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:32,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 2727 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:32,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:32,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:32,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:33,365 INFO L124 PetriNetUnfolderBase]: 4244/6502 cut-off events. [2024-06-21 16:12:33,365 INFO L125 PetriNetUnfolderBase]: For 721939/721939 co-relation queries the response was YES. [2024-06-21 16:12:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58263 conditions, 6502 events. 4244/6502 cut-off events. For 721939/721939 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36357 event pairs, 1162 based on Foata normal form. 1/6502 useless extension candidates. Maximal degree in co-relation 58159. Up to 6454 conditions per place. [2024-06-21 16:12:33,439 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 228 selfloop transitions, 24 changer transitions 0/255 dead transitions. [2024-06-21 16:12:33,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 255 transitions, 3473 flow [2024-06-21 16:12:33,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:12:33,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 16:12:33,440 INFO L175 Difference]: Start difference. First operand has 214 places, 232 transitions, 2727 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:12:33,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 255 transitions, 3473 flow [2024-06-21 16:12:34,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 255 transitions, 3403 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:12:34,513 INFO L231 Difference]: Finished difference. Result has 215 places, 238 transitions, 2785 flow [2024-06-21 16:12:34,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2785, PETRI_PLACES=215, PETRI_TRANSITIONS=238} [2024-06-21 16:12:34,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 16:12:34,514 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 238 transitions, 2785 flow [2024-06-21 16:12:34,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:34,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:34,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:34,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:12:34,514 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:34,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:34,514 INFO L85 PathProgramCache]: Analyzing trace with hash -685399397, now seen corresponding path program 1 times [2024-06-21 16:12:34,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:34,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250207439] [2024-06-21 16:12:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:34,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:35,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250207439] [2024-06-21 16:12:35,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250207439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:35,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:35,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:35,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295310611] [2024-06-21 16:12:35,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:35,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:35,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:35,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:35,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:35,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 238 transitions, 2785 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:35,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:35,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:35,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:36,595 INFO L124 PetriNetUnfolderBase]: 4259/6523 cut-off events. [2024-06-21 16:12:36,595 INFO L125 PetriNetUnfolderBase]: For 746478/746478 co-relation queries the response was YES. [2024-06-21 16:12:36,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59123 conditions, 6523 events. 4259/6523 cut-off events. For 746478/746478 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36481 event pairs, 1158 based on Foata normal form. 3/6525 useless extension candidates. Maximal degree in co-relation 59018. Up to 6455 conditions per place. [2024-06-21 16:12:36,659 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 235 selfloop transitions, 25 changer transitions 0/263 dead transitions. [2024-06-21 16:12:36,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 263 transitions, 3583 flow [2024-06-21 16:12:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:36,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:12:36,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 16:12:36,660 INFO L175 Difference]: Start difference. First operand has 215 places, 238 transitions, 2785 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:12:36,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 263 transitions, 3583 flow [2024-06-21 16:12:37,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 263 transitions, 3523 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 16:12:37,857 INFO L231 Difference]: Finished difference. Result has 219 places, 244 transitions, 2883 flow [2024-06-21 16:12:37,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2725, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2883, PETRI_PLACES=219, PETRI_TRANSITIONS=244} [2024-06-21 16:12:37,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 16:12:37,857 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 244 transitions, 2883 flow [2024-06-21 16:12:37,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:37,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:37,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:37,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:12:37,858 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:37,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash -685399614, now seen corresponding path program 2 times [2024-06-21 16:12:37,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:37,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906480411] [2024-06-21 16:12:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:38,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906480411] [2024-06-21 16:12:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906480411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:38,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:38,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:38,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413692974] [2024-06-21 16:12:38,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:38,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:38,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:38,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:38,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:38,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 244 transitions, 2883 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:38,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:38,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:38,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:39,927 INFO L124 PetriNetUnfolderBase]: 4264/6530 cut-off events. [2024-06-21 16:12:39,927 INFO L125 PetriNetUnfolderBase]: For 759821/759821 co-relation queries the response was YES. [2024-06-21 16:12:39,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59492 conditions, 6530 events. 4264/6530 cut-off events. For 759821/759821 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36473 event pairs, 1162 based on Foata normal form. 1/6530 useless extension candidates. Maximal degree in co-relation 59385. Up to 6481 conditions per place. [2024-06-21 16:12:40,158 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 26 changer transitions 0/261 dead transitions. [2024-06-21 16:12:40,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 261 transitions, 3597 flow [2024-06-21 16:12:40,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:40,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:40,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:12:40,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 16:12:40,159 INFO L175 Difference]: Start difference. First operand has 219 places, 244 transitions, 2883 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:12:40,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 261 transitions, 3597 flow [2024-06-21 16:12:41,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 261 transitions, 3533 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 16:12:41,003 INFO L231 Difference]: Finished difference. Result has 223 places, 247 transitions, 2905 flow [2024-06-21 16:12:41,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2905, PETRI_PLACES=223, PETRI_TRANSITIONS=247} [2024-06-21 16:12:41,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 16:12:41,003 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 247 transitions, 2905 flow [2024-06-21 16:12:41,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:41,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:41,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:41,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:12:41,003 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:41,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1736187415, now seen corresponding path program 2 times [2024-06-21 16:12:41,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:41,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779062975] [2024-06-21 16:12:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:41,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:41,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779062975] [2024-06-21 16:12:41,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779062975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:41,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:41,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:41,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448728448] [2024-06-21 16:12:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:41,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:41,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:41,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:41,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:41,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 247 transitions, 2905 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:41,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:41,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:41,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:42,995 INFO L124 PetriNetUnfolderBase]: 4279/6552 cut-off events. [2024-06-21 16:12:42,995 INFO L125 PetriNetUnfolderBase]: For 783061/783064 co-relation queries the response was YES. [2024-06-21 16:12:43,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59858 conditions, 6552 events. 4279/6552 cut-off events. For 783061/783064 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36644 event pairs, 1158 based on Foata normal form. 5/6555 useless extension candidates. Maximal degree in co-relation 59749. Up to 6476 conditions per place. [2024-06-21 16:12:43,073 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 233 selfloop transitions, 29 changer transitions 0/265 dead transitions. [2024-06-21 16:12:43,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 265 transitions, 3653 flow [2024-06-21 16:12:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:43,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:12:43,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-21 16:12:43,075 INFO L175 Difference]: Start difference. First operand has 223 places, 247 transitions, 2905 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:12:43,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 265 transitions, 3653 flow [2024-06-21 16:12:44,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 265 transitions, 3601 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:12:44,804 INFO L231 Difference]: Finished difference. Result has 226 places, 250 transitions, 2966 flow [2024-06-21 16:12:44,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2966, PETRI_PLACES=226, PETRI_TRANSITIONS=250} [2024-06-21 16:12:44,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 16:12:44,805 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 250 transitions, 2966 flow [2024-06-21 16:12:44,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:44,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:44,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:44,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:12:44,805 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:44,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:44,806 INFO L85 PathProgramCache]: Analyzing trace with hash -478745957, now seen corresponding path program 3 times [2024-06-21 16:12:44,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:44,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269031087] [2024-06-21 16:12:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:44,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:45,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269031087] [2024-06-21 16:12:45,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269031087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:45,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:45,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:45,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584315728] [2024-06-21 16:12:45,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:45,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:45,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:45,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:45,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:45,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:45,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 250 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:45,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:45,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:45,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:46,868 INFO L124 PetriNetUnfolderBase]: 4270/6540 cut-off events. [2024-06-21 16:12:46,868 INFO L125 PetriNetUnfolderBase]: For 794195/794198 co-relation queries the response was YES. [2024-06-21 16:12:46,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59864 conditions, 6540 events. 4270/6540 cut-off events. For 794195/794198 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36559 event pairs, 1156 based on Foata normal form. 5/6543 useless extension candidates. Maximal degree in co-relation 59754. Up to 6469 conditions per place. [2024-06-21 16:12:46,944 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 235 selfloop transitions, 28 changer transitions 0/266 dead transitions. [2024-06-21 16:12:46,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 266 transitions, 3534 flow [2024-06-21 16:12:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:12:46,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 16:12:46,945 INFO L175 Difference]: Start difference. First operand has 226 places, 250 transitions, 2966 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:12:46,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 266 transitions, 3534 flow [2024-06-21 16:12:48,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 266 transitions, 3423 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 16:12:48,362 INFO L231 Difference]: Finished difference. Result has 229 places, 250 transitions, 2917 flow [2024-06-21 16:12:48,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2917, PETRI_PLACES=229, PETRI_TRANSITIONS=250} [2024-06-21 16:12:48,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 16:12:48,363 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 250 transitions, 2917 flow [2024-06-21 16:12:48,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:48,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:48,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:48,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:12:48,363 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:48,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:48,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1237218948, now seen corresponding path program 3 times [2024-06-21 16:12:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:48,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732494623] [2024-06-21 16:12:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:48,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:49,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732494623] [2024-06-21 16:12:49,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732494623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:49,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:49,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:49,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876674495] [2024-06-21 16:12:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:49,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:49,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:49,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 250 transitions, 2917 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:49,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:49,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:49,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:50,350 INFO L124 PetriNetUnfolderBase]: 4267/6537 cut-off events. [2024-06-21 16:12:50,350 INFO L125 PetriNetUnfolderBase]: For 804135/804138 co-relation queries the response was YES. [2024-06-21 16:12:50,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59856 conditions, 6537 events. 4267/6537 cut-off events. For 804135/804138 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36608 event pairs, 1166 based on Foata normal form. 3/6537 useless extension candidates. Maximal degree in co-relation 59745. Up to 6487 conditions per place. [2024-06-21 16:12:50,431 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 26 changer transitions 0/260 dead transitions. [2024-06-21 16:12:50,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 260 transitions, 3455 flow [2024-06-21 16:12:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:50,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 16:12:50,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 16:12:50,432 INFO L175 Difference]: Start difference. First operand has 229 places, 250 transitions, 2917 flow. Second operand 7 states and 112 transitions. [2024-06-21 16:12:50,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 260 transitions, 3455 flow [2024-06-21 16:12:51,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 260 transitions, 3362 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:12:51,805 INFO L231 Difference]: Finished difference. Result has 229 places, 250 transitions, 2882 flow [2024-06-21 16:12:51,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2824, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2882, PETRI_PLACES=229, PETRI_TRANSITIONS=250} [2024-06-21 16:12:51,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 16:12:51,806 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 250 transitions, 2882 flow [2024-06-21 16:12:51,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:51,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:51,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:51,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:12:51,807 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:51,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash -984861381, now seen corresponding path program 1 times [2024-06-21 16:12:51,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:51,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222016034] [2024-06-21 16:12:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:52,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:52,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222016034] [2024-06-21 16:12:52,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222016034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:52,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:52,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:12:52,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098505436] [2024-06-21 16:12:52,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:12:52,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:12:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:12:52,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:12:52,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 250 transitions, 2882 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:52,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:52,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:12:52,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:54,212 INFO L124 PetriNetUnfolderBase]: 4133/6390 cut-off events. [2024-06-21 16:12:54,212 INFO L125 PetriNetUnfolderBase]: For 820227/820227 co-relation queries the response was YES. [2024-06-21 16:12:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59134 conditions, 6390 events. 4133/6390 cut-off events. For 820227/820227 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36331 event pairs, 1132 based on Foata normal form. 1/6369 useless extension candidates. Maximal degree in co-relation 59022. Up to 6155 conditions per place. [2024-06-21 16:12:54,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-21 16:12:54,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 295 transitions, 3813 flow [2024-06-21 16:12:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:12:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:12:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:12:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 16:12:54,293 INFO L175 Difference]: Start difference. First operand has 229 places, 250 transitions, 2882 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:12:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 295 transitions, 3813 flow [2024-06-21 16:12:55,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 295 transitions, 3733 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:12:55,768 INFO L231 Difference]: Finished difference. Result has 231 places, 264 transitions, 3063 flow [2024-06-21 16:12:55,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2802, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3063, PETRI_PLACES=231, PETRI_TRANSITIONS=264} [2024-06-21 16:12:55,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-21 16:12:55,768 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 264 transitions, 3063 flow [2024-06-21 16:12:55,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:55,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:55,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:55,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:12:55,769 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:12:55,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:55,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1831796637, now seen corresponding path program 1 times [2024-06-21 16:12:55,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:55,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244809261] [2024-06-21 16:12:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:55,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:56,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:56,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244809261] [2024-06-21 16:12:56,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244809261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:56,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:56,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:56,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036939919] [2024-06-21 16:12:56,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:56,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:56,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:56,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:56,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 264 transitions, 3063 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:56,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:56,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:56,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:12:57,790 INFO L124 PetriNetUnfolderBase]: 4290/6568 cut-off events. [2024-06-21 16:12:57,790 INFO L125 PetriNetUnfolderBase]: For 848897/848900 co-relation queries the response was YES. [2024-06-21 16:12:57,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61289 conditions, 6568 events. 4290/6568 cut-off events. For 848897/848900 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36800 event pairs, 1157 based on Foata normal form. 3/6569 useless extension candidates. Maximal degree in co-relation 61176. Up to 6481 conditions per place. [2024-06-21 16:12:57,868 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 257 selfloop transitions, 34 changer transitions 0/294 dead transitions. [2024-06-21 16:12:57,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 294 transitions, 4163 flow [2024-06-21 16:12:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:12:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:12:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 16:12:57,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-21 16:12:57,869 INFO L175 Difference]: Start difference. First operand has 231 places, 264 transitions, 3063 flow. Second operand 7 states and 124 transitions. [2024-06-21 16:12:57,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 294 transitions, 4163 flow [2024-06-21 16:12:59,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 294 transitions, 4087 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-21 16:12:59,077 INFO L231 Difference]: Finished difference. Result has 236 places, 273 transitions, 3241 flow [2024-06-21 16:12:59,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3241, PETRI_PLACES=236, PETRI_TRANSITIONS=273} [2024-06-21 16:12:59,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 16:12:59,078 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 273 transitions, 3241 flow [2024-06-21 16:12:59,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:59,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:12:59,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:12:59,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:12:59,078 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 16:12:59,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:12:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1571213893, now seen corresponding path program 2 times [2024-06-21 16:12:59,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:12:59,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303779575] [2024-06-21 16:12:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:12:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:12:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:12:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:12:59,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:12:59,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303779575] [2024-06-21 16:12:59,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303779575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:12:59,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:12:59,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:12:59,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607922685] [2024-06-21 16:12:59,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:12:59,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:12:59,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:12:59,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:12:59,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:12:59,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:12:59,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 273 transitions, 3241 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:12:59,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:12:59,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:12:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:01,022 INFO L124 PetriNetUnfolderBase]: 4303/6586 cut-off events. [2024-06-21 16:13:01,022 INFO L125 PetriNetUnfolderBase]: For 873689/873692 co-relation queries the response was YES. [2024-06-21 16:13:01,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62169 conditions, 6586 events. 4303/6586 cut-off events. For 873689/873692 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 36895 event pairs, 1161 based on Foata normal form. 3/6587 useless extension candidates. Maximal degree in co-relation 62054. Up to 6496 conditions per place. [2024-06-21 16:13:01,097 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 254 selfloop transitions, 41 changer transitions 0/298 dead transitions. [2024-06-21 16:13:01,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 298 transitions, 4310 flow [2024-06-21 16:13:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:01,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:01,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:13:01,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 16:13:01,098 INFO L175 Difference]: Start difference. First operand has 236 places, 273 transitions, 3241 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:13:01,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 298 transitions, 4310 flow [2024-06-21 16:13:02,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 298 transitions, 4190 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-21 16:13:02,979 INFO L231 Difference]: Finished difference. Result has 241 places, 280 transitions, 3348 flow [2024-06-21 16:13:02,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3147, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3348, PETRI_PLACES=241, PETRI_TRANSITIONS=280} [2024-06-21 16:13:02,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-21 16:13:02,980 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 280 transitions, 3348 flow [2024-06-21 16:13:02,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:02,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:02,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:13:02,980 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:02,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -624844265, now seen corresponding path program 1 times [2024-06-21 16:13:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:02,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508735028] [2024-06-21 16:13:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:04,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:04,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508735028] [2024-06-21 16:13:04,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508735028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:04,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:04,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:04,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877227575] [2024-06-21 16:13:04,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:04,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:04,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:04,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:04,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:04,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 280 transitions, 3348 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:04,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:04,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:04,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:05,825 INFO L124 PetriNetUnfolderBase]: 4201/6481 cut-off events. [2024-06-21 16:13:05,825 INFO L125 PetriNetUnfolderBase]: For 892467/892470 co-relation queries the response was YES. [2024-06-21 16:13:05,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61437 conditions, 6481 events. 4201/6481 cut-off events. For 892467/892470 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36671 event pairs, 930 based on Foata normal form. 4/6482 useless extension candidates. Maximal degree in co-relation 61320. Up to 5888 conditions per place. [2024-06-21 16:13:05,904 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 240 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-21 16:13:05,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 327 transitions, 4194 flow [2024-06-21 16:13:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 16:13:05,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 16:13:05,905 INFO L175 Difference]: Start difference. First operand has 241 places, 280 transitions, 3348 flow. Second operand 10 states and 191 transitions. [2024-06-21 16:13:05,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 327 transitions, 4194 flow [2024-06-21 16:13:06,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 327 transitions, 4099 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 16:13:06,995 INFO L231 Difference]: Finished difference. Result has 249 places, 285 transitions, 3502 flow [2024-06-21 16:13:06,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3502, PETRI_PLACES=249, PETRI_TRANSITIONS=285} [2024-06-21 16:13:06,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-21 16:13:06,995 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 285 transitions, 3502 flow [2024-06-21 16:13:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:06,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:06,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:06,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:13:06,996 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:06,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:06,997 INFO L85 PathProgramCache]: Analyzing trace with hash -452115365, now seen corresponding path program 2 times [2024-06-21 16:13:06,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:06,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100820893] [2024-06-21 16:13:06,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:06,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:08,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:08,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100820893] [2024-06-21 16:13:08,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100820893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:08,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:08,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180335704] [2024-06-21 16:13:08,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:08,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:08,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 285 transitions, 3502 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:08,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:08,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:09,706 INFO L124 PetriNetUnfolderBase]: 4226/6516 cut-off events. [2024-06-21 16:13:09,707 INFO L125 PetriNetUnfolderBase]: For 927007/927010 co-relation queries the response was YES. [2024-06-21 16:13:09,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62945 conditions, 6516 events. 4226/6516 cut-off events. For 927007/927010 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36925 event pairs, 922 based on Foata normal form. 4/6507 useless extension candidates. Maximal degree in co-relation 62826. Up to 5850 conditions per place. [2024-06-21 16:13:09,788 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 235 selfloop transitions, 77 changer transitions 0/334 dead transitions. [2024-06-21 16:13:09,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 334 transitions, 4494 flow [2024-06-21 16:13:09,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 16:13:09,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 16:13:09,793 INFO L175 Difference]: Start difference. First operand has 249 places, 285 transitions, 3502 flow. Second operand 10 states and 188 transitions. [2024-06-21 16:13:09,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 334 transitions, 4494 flow [2024-06-21 16:13:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 334 transitions, 4281 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:10,800 INFO L231 Difference]: Finished difference. Result has 254 places, 295 transitions, 3742 flow [2024-06-21 16:13:10,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3742, PETRI_PLACES=254, PETRI_TRANSITIONS=295} [2024-06-21 16:13:10,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 16:13:10,800 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 295 transitions, 3742 flow [2024-06-21 16:13:10,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:10,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:10,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:10,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:13:10,801 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 16:13:10,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash -974385861, now seen corresponding path program 2 times [2024-06-21 16:13:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:10,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95053207] [2024-06-21 16:13:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:10,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:11,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95053207] [2024-06-21 16:13:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95053207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:11,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:13:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945398844] [2024-06-21 16:13:11,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:11,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:13:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:11,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:13:11,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:13:11,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:11,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 295 transitions, 3742 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:11,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:11,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:11,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:13,055 INFO L124 PetriNetUnfolderBase]: 4169/6444 cut-off events. [2024-06-21 16:13:13,055 INFO L125 PetriNetUnfolderBase]: For 931872/931872 co-relation queries the response was YES. [2024-06-21 16:13:13,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63004 conditions, 6444 events. 4169/6444 cut-off events. For 931872/931872 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36657 event pairs, 1087 based on Foata normal form. 1/6423 useless extension candidates. Maximal degree in co-relation 62882. Up to 6222 conditions per place. [2024-06-21 16:13:13,136 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 29 changer transitions 0/315 dead transitions. [2024-06-21 16:13:13,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 315 transitions, 4404 flow [2024-06-21 16:13:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:13:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:13:13,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:13:13,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:13:13,137 INFO L175 Difference]: Start difference. First operand has 254 places, 295 transitions, 3742 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:13:13,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 315 transitions, 4404 flow [2024-06-21 16:13:14,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 315 transitions, 4154 flow, removed 98 selfloop flow, removed 4 redundant places. [2024-06-21 16:13:14,349 INFO L231 Difference]: Finished difference. Result has 258 places, 298 transitions, 3610 flow [2024-06-21 16:13:14,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3610, PETRI_PLACES=258, PETRI_TRANSITIONS=298} [2024-06-21 16:13:14,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 16:13:14,350 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 298 transitions, 3610 flow [2024-06-21 16:13:14,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:14,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:14,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:14,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:13:14,350 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:14,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:14,350 INFO L85 PathProgramCache]: Analyzing trace with hash 215061691, now seen corresponding path program 3 times [2024-06-21 16:13:14,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:14,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060519310] [2024-06-21 16:13:14,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:14,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:15,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:15,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:15,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060519310] [2024-06-21 16:13:15,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060519310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:15,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:15,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:13:15,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985371677] [2024-06-21 16:13:15,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:15,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:13:15,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:15,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:13:15,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:13:15,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:13:15,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 298 transitions, 3610 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:15,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:15,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:13:15,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:16,315 INFO L124 PetriNetUnfolderBase]: 4314/6603 cut-off events. [2024-06-21 16:13:16,316 INFO L125 PetriNetUnfolderBase]: For 946483/946483 co-relation queries the response was YES. [2024-06-21 16:13:16,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63148 conditions, 6603 events. 4314/6603 cut-off events. For 946483/946483 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 36983 event pairs, 1107 based on Foata normal form. 1/6603 useless extension candidates. Maximal degree in co-relation 63024. Up to 6555 conditions per place. [2024-06-21 16:13:16,396 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 288 selfloop transitions, 24 changer transitions 0/315 dead transitions. [2024-06-21 16:13:16,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 315 transitions, 4432 flow [2024-06-21 16:13:16,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:16,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:13:16,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-21 16:13:16,397 INFO L175 Difference]: Start difference. First operand has 258 places, 298 transitions, 3610 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:13:16,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 315 transitions, 4432 flow [2024-06-21 16:13:17,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 315 transitions, 4304 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:17,781 INFO L231 Difference]: Finished difference. Result has 260 places, 298 transitions, 3536 flow [2024-06-21 16:13:17,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3536, PETRI_PLACES=260, PETRI_TRANSITIONS=298} [2024-06-21 16:13:17,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 16:13:17,781 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 298 transitions, 3536 flow [2024-06-21 16:13:17,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:17,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:17,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:17,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:13:17,781 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 16:13:17,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:17,782 INFO L85 PathProgramCache]: Analyzing trace with hash 227441851, now seen corresponding path program 4 times [2024-06-21 16:13:17,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:17,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078673154] [2024-06-21 16:13:17,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:17,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:18,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:18,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078673154] [2024-06-21 16:13:18,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078673154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:18,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:18,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:13:18,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136230325] [2024-06-21 16:13:18,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:18,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:13:18,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:13:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:13:18,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:13:18,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 298 transitions, 3536 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:18,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:18,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:13:18,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:19,792 INFO L124 PetriNetUnfolderBase]: 4319/6610 cut-off events. [2024-06-21 16:13:19,792 INFO L125 PetriNetUnfolderBase]: For 964400/964400 co-relation queries the response was YES. [2024-06-21 16:13:19,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63260 conditions, 6610 events. 4319/6610 cut-off events. For 964400/964400 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37035 event pairs, 1107 based on Foata normal form. 1/6610 useless extension candidates. Maximal degree in co-relation 63135. Up to 6577 conditions per place. [2024-06-21 16:13:19,873 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 19 changer transitions 0/314 dead transitions. [2024-06-21 16:13:19,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 314 transitions, 4255 flow [2024-06-21 16:13:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:13:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:13:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-21 16:13:19,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-21 16:13:19,874 INFO L175 Difference]: Start difference. First operand has 260 places, 298 transitions, 3536 flow. Second operand 7 states and 113 transitions. [2024-06-21 16:13:19,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 314 transitions, 4255 flow [2024-06-21 16:13:21,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 314 transitions, 4157 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:13:21,100 INFO L231 Difference]: Finished difference. Result has 261 places, 301 transitions, 3553 flow [2024-06-21 16:13:21,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3553, PETRI_PLACES=261, PETRI_TRANSITIONS=301} [2024-06-21 16:13:21,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 16:13:21,100 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 301 transitions, 3553 flow [2024-06-21 16:13:21,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:21,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:21,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:13:21,101 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:21,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash 176317273, now seen corresponding path program 3 times [2024-06-21 16:13:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:21,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942432900] [2024-06-21 16:13:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:21,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:22,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942432900] [2024-06-21 16:13:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942432900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:22,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:22,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660634734] [2024-06-21 16:13:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:22,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:22,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:22,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:22,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 301 transitions, 3553 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:22,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:22,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:22,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:23,908 INFO L124 PetriNetUnfolderBase]: 4241/6542 cut-off events. [2024-06-21 16:13:23,908 INFO L125 PetriNetUnfolderBase]: For 998257/998257 co-relation queries the response was YES. [2024-06-21 16:13:23,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63276 conditions, 6542 events. 4241/6542 cut-off events. For 998257/998257 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 37142 event pairs, 1027 based on Foata normal form. 4/6545 useless extension candidates. Maximal degree in co-relation 63151. Up to 6064 conditions per place. [2024-06-21 16:13:23,988 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 273 selfloop transitions, 50 changer transitions 0/347 dead transitions. [2024-06-21 16:13:23,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 347 transitions, 4565 flow [2024-06-21 16:13:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 16:13:23,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 16:13:23,989 INFO L175 Difference]: Start difference. First operand has 261 places, 301 transitions, 3553 flow. Second operand 10 states and 182 transitions. [2024-06-21 16:13:23,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 347 transitions, 4565 flow [2024-06-21 16:13:25,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 347 transitions, 4497 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:25,410 INFO L231 Difference]: Finished difference. Result has 268 places, 311 transitions, 3885 flow [2024-06-21 16:13:25,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3885, PETRI_PLACES=268, PETRI_TRANSITIONS=311} [2024-06-21 16:13:25,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 16:13:25,410 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 311 transitions, 3885 flow [2024-06-21 16:13:25,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:25,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:25,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:25,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:13:25,411 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:25,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:25,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1532948239, now seen corresponding path program 4 times [2024-06-21 16:13:25,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:25,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121692170] [2024-06-21 16:13:25,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:25,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:26,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:26,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121692170] [2024-06-21 16:13:26,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121692170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:26,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:26,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:26,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741875340] [2024-06-21 16:13:26,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:26,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:26,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:26,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:26,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:26,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:26,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 311 transitions, 3885 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:26,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:26,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:26,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:28,233 INFO L124 PetriNetUnfolderBase]: 4258/6569 cut-off events. [2024-06-21 16:13:28,233 INFO L125 PetriNetUnfolderBase]: For 1029355/1029355 co-relation queries the response was YES. [2024-06-21 16:13:28,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64643 conditions, 6569 events. 4258/6569 cut-off events. For 1029355/1029355 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 37368 event pairs, 1028 based on Foata normal form. 4/6572 useless extension candidates. Maximal degree in co-relation 64515. Up to 6323 conditions per place. [2024-06-21 16:13:28,320 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 301 selfloop transitions, 22 changer transitions 0/347 dead transitions. [2024-06-21 16:13:28,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 347 transitions, 4720 flow [2024-06-21 16:13:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 16:13:28,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 16:13:28,321 INFO L175 Difference]: Start difference. First operand has 268 places, 311 transitions, 3885 flow. Second operand 10 states and 174 transitions. [2024-06-21 16:13:28,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 347 transitions, 4720 flow [2024-06-21 16:13:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 347 transitions, 4485 flow, removed 101 selfloop flow, removed 4 redundant places. [2024-06-21 16:13:30,212 INFO L231 Difference]: Finished difference. Result has 274 places, 313 transitions, 3806 flow [2024-06-21 16:13:30,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3650, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3806, PETRI_PLACES=274, PETRI_TRANSITIONS=313} [2024-06-21 16:13:30,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 16:13:30,212 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 313 transitions, 3806 flow [2024-06-21 16:13:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:30,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:30,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:30,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:13:30,213 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2123448597, now seen corresponding path program 5 times [2024-06-21 16:13:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:30,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949386534] [2024-06-21 16:13:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:30,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:31,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949386534] [2024-06-21 16:13:31,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949386534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:31,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:31,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:31,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8927818] [2024-06-21 16:13:31,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:31,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:31,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:31,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:31,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:31,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 313 transitions, 3806 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:31,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:31,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:31,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:33,309 INFO L124 PetriNetUnfolderBase]: 4275/6596 cut-off events. [2024-06-21 16:13:33,309 INFO L125 PetriNetUnfolderBase]: For 1049120/1049120 co-relation queries the response was YES. [2024-06-21 16:13:33,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64631 conditions, 6596 events. 4275/6596 cut-off events. For 1049120/1049120 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 37436 event pairs, 1026 based on Foata normal form. 4/6599 useless extension candidates. Maximal degree in co-relation 64501. Up to 6336 conditions per place. [2024-06-21 16:13:33,397 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 22 changer transitions 0/349 dead transitions. [2024-06-21 16:13:33,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 349 transitions, 4652 flow [2024-06-21 16:13:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-21 16:13:33,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-21 16:13:33,398 INFO L175 Difference]: Start difference. First operand has 274 places, 313 transitions, 3806 flow. Second operand 10 states and 173 transitions. [2024-06-21 16:13:33,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 349 transitions, 4652 flow [2024-06-21 16:13:35,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 349 transitions, 4509 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 16:13:35,033 INFO L231 Difference]: Finished difference. Result has 277 places, 315 transitions, 3830 flow [2024-06-21 16:13:35,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3830, PETRI_PLACES=277, PETRI_TRANSITIONS=315} [2024-06-21 16:13:35,034 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 16:13:35,034 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 315 transitions, 3830 flow [2024-06-21 16:13:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:35,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:35,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:35,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:13:35,035 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:35,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:35,035 INFO L85 PathProgramCache]: Analyzing trace with hash 145981957, now seen corresponding path program 6 times [2024-06-21 16:13:35,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:35,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283820278] [2024-06-21 16:13:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:35,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:36,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:36,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283820278] [2024-06-21 16:13:36,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283820278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:36,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:36,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:36,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289409922] [2024-06-21 16:13:36,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:36,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:36,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:36,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 315 transitions, 3830 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:36,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:36,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:36,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:37,898 INFO L124 PetriNetUnfolderBase]: 4314/6655 cut-off events. [2024-06-21 16:13:37,898 INFO L125 PetriNetUnfolderBase]: For 1074007/1074007 co-relation queries the response was YES. [2024-06-21 16:13:37,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65323 conditions, 6655 events. 4314/6655 cut-off events. For 1074007/1074007 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 37950 event pairs, 1028 based on Foata normal form. 4/6658 useless extension candidates. Maximal degree in co-relation 65192. Up to 6332 conditions per place. [2024-06-21 16:13:37,984 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 300 selfloop transitions, 34 changer transitions 0/358 dead transitions. [2024-06-21 16:13:37,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 358 transitions, 4782 flow [2024-06-21 16:13:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:13:37,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 16:13:37,985 INFO L175 Difference]: Start difference. First operand has 277 places, 315 transitions, 3830 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:13:37,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 358 transitions, 4782 flow [2024-06-21 16:13:39,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 358 transitions, 4633 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:39,814 INFO L231 Difference]: Finished difference. Result has 280 places, 323 transitions, 3966 flow [2024-06-21 16:13:39,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3966, PETRI_PLACES=280, PETRI_TRANSITIONS=323} [2024-06-21 16:13:39,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 16:13:39,814 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 323 transitions, 3966 flow [2024-06-21 16:13:39,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:39,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:39,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:39,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:13:39,815 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:39,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash 2123151927, now seen corresponding path program 7 times [2024-06-21 16:13:39,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:39,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41111211] [2024-06-21 16:13:39,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:39,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41111211] [2024-06-21 16:13:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41111211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:41,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:41,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262830850] [2024-06-21 16:13:41,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:41,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:41,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:41,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:41,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:41,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 323 transitions, 3966 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:41,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:41,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:42,958 INFO L124 PetriNetUnfolderBase]: 4331/6682 cut-off events. [2024-06-21 16:13:42,959 INFO L125 PetriNetUnfolderBase]: For 1101745/1101745 co-relation queries the response was YES. [2024-06-21 16:13:43,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66268 conditions, 6682 events. 4331/6682 cut-off events. For 1101745/1101745 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38145 event pairs, 1028 based on Foata normal form. 4/6685 useless extension candidates. Maximal degree in co-relation 66135. Up to 6391 conditions per place. [2024-06-21 16:13:43,055 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 303 selfloop transitions, 32 changer transitions 0/359 dead transitions. [2024-06-21 16:13:43,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 359 transitions, 4842 flow [2024-06-21 16:13:43,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 16:13:43,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:13:43,056 INFO L175 Difference]: Start difference. First operand has 280 places, 323 transitions, 3966 flow. Second operand 10 states and 175 transitions. [2024-06-21 16:13:43,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 359 transitions, 4842 flow [2024-06-21 16:13:44,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 359 transitions, 4681 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-21 16:13:44,756 INFO L231 Difference]: Finished difference. Result has 285 places, 325 transitions, 4001 flow [2024-06-21 16:13:44,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3805, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4001, PETRI_PLACES=285, PETRI_TRANSITIONS=325} [2024-06-21 16:13:44,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 16:13:44,756 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 325 transitions, 4001 flow [2024-06-21 16:13:44,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:44,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:44,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:44,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:13:44,757 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:44,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:44,758 INFO L85 PathProgramCache]: Analyzing trace with hash -391443073, now seen corresponding path program 8 times [2024-06-21 16:13:44,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:44,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115753886] [2024-06-21 16:13:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:44,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:45,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:45,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115753886] [2024-06-21 16:13:45,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115753886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:45,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:45,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570834446] [2024-06-21 16:13:45,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:45,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:45,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:46,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 325 transitions, 4001 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:47,746 INFO L124 PetriNetUnfolderBase]: 4348/6709 cut-off events. [2024-06-21 16:13:47,746 INFO L125 PetriNetUnfolderBase]: For 1124791/1124791 co-relation queries the response was YES. [2024-06-21 16:13:47,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66555 conditions, 6709 events. 4348/6709 cut-off events. For 1124791/1124791 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38296 event pairs, 1052 based on Foata normal form. 4/6712 useless extension candidates. Maximal degree in co-relation 66421. Up to 6422 conditions per place. [2024-06-21 16:13:47,826 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 312 selfloop transitions, 25 changer transitions 0/361 dead transitions. [2024-06-21 16:13:47,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 361 transitions, 4883 flow [2024-06-21 16:13:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-21 16:13:47,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:13:47,827 INFO L175 Difference]: Start difference. First operand has 285 places, 325 transitions, 4001 flow. Second operand 10 states and 175 transitions. [2024-06-21 16:13:47,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 361 transitions, 4883 flow [2024-06-21 16:13:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 361 transitions, 4715 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:49,559 INFO L231 Difference]: Finished difference. Result has 287 places, 327 transitions, 4016 flow [2024-06-21 16:13:49,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3833, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4016, PETRI_PLACES=287, PETRI_TRANSITIONS=327} [2024-06-21 16:13:49,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 16:13:49,560 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 327 transitions, 4016 flow [2024-06-21 16:13:49,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:49,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:49,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:49,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:13:49,560 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:49,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:49,560 INFO L85 PathProgramCache]: Analyzing trace with hash 139495207, now seen corresponding path program 9 times [2024-06-21 16:13:49,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:49,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717963160] [2024-06-21 16:13:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:50,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:50,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717963160] [2024-06-21 16:13:50,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717963160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:50,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:50,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:50,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14166646] [2024-06-21 16:13:50,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:50,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:50,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:50,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:51,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:51,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 327 transitions, 4016 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:51,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:51,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:51,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:52,587 INFO L124 PetriNetUnfolderBase]: 4340/6697 cut-off events. [2024-06-21 16:13:52,587 INFO L125 PetriNetUnfolderBase]: For 1136518/1136518 co-relation queries the response was YES. [2024-06-21 16:13:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66241 conditions, 6697 events. 4340/6697 cut-off events. For 1136518/1136518 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38248 event pairs, 1036 based on Foata normal form. 4/6700 useless extension candidates. Maximal degree in co-relation 66106. Up to 6374 conditions per place. [2024-06-21 16:13:52,677 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 305 selfloop transitions, 35 changer transitions 0/364 dead transitions. [2024-06-21 16:13:52,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 364 transitions, 4903 flow [2024-06-21 16:13:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-21 16:13:52,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-21 16:13:52,679 INFO L175 Difference]: Start difference. First operand has 287 places, 327 transitions, 4016 flow. Second operand 10 states and 178 transitions. [2024-06-21 16:13:52,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 364 transitions, 4903 flow [2024-06-21 16:13:54,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 364 transitions, 4738 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 16:13:54,816 INFO L231 Difference]: Finished difference. Result has 289 places, 329 transitions, 4047 flow [2024-06-21 16:13:54,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4047, PETRI_PLACES=289, PETRI_TRANSITIONS=329} [2024-06-21 16:13:54,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 16:13:54,816 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 329 transitions, 4047 flow [2024-06-21 16:13:54,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:54,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:54,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:54,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:13:54,817 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:54,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash -2123591905, now seen corresponding path program 10 times [2024-06-21 16:13:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:54,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287608730] [2024-06-21 16:13:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:54,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:13:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:13:56,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:13:56,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287608730] [2024-06-21 16:13:56,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287608730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:13:56,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:13:56,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:13:56,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344903769] [2024-06-21 16:13:56,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:13:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:13:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:13:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:13:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:13:56,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:13:56,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 329 transitions, 4047 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:56,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:13:56,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:13:56,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:13:57,713 INFO L124 PetriNetUnfolderBase]: 4357/6724 cut-off events. [2024-06-21 16:13:57,713 INFO L125 PetriNetUnfolderBase]: For 1164052/1164052 co-relation queries the response was YES. [2024-06-21 16:13:57,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66833 conditions, 6724 events. 4357/6724 cut-off events. For 1164052/1164052 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38468 event pairs, 1041 based on Foata normal form. 4/6727 useless extension candidates. Maximal degree in co-relation 66697. Up to 6342 conditions per place. [2024-06-21 16:13:57,805 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 303 selfloop transitions, 39 changer transitions 0/366 dead transitions. [2024-06-21 16:13:57,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 366 transitions, 4949 flow [2024-06-21 16:13:57,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:13:57,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:13:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:13:57,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 16:13:57,806 INFO L175 Difference]: Start difference. First operand has 289 places, 329 transitions, 4047 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:13:57,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 366 transitions, 4949 flow [2024-06-21 16:13:59,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 366 transitions, 4758 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-21 16:13:59,586 INFO L231 Difference]: Finished difference. Result has 290 places, 331 transitions, 4073 flow [2024-06-21 16:13:59,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4073, PETRI_PLACES=290, PETRI_TRANSITIONS=331} [2024-06-21 16:13:59,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-21 16:13:59,586 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 331 transitions, 4073 flow [2024-06-21 16:13:59,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:13:59,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:13:59,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:13:59,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:13:59,586 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:13:59,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:13:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1818056479, now seen corresponding path program 11 times [2024-06-21 16:13:59,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:13:59,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924677763] [2024-06-21 16:13:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:13:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:13:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:00,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:00,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924677763] [2024-06-21 16:14:00,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924677763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:00,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:00,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:14:00,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232515603] [2024-06-21 16:14:00,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:00,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:14:00,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:14:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:14:01,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:01,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 331 transitions, 4073 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:01,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:01,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:01,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:02,713 INFO L124 PetriNetUnfolderBase]: 4349/6712 cut-off events. [2024-06-21 16:14:02,714 INFO L125 PetriNetUnfolderBase]: For 1174772/1174772 co-relation queries the response was YES. [2024-06-21 16:14:02,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66461 conditions, 6712 events. 4349/6712 cut-off events. For 1174772/1174772 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 38353 event pairs, 1029 based on Foata normal form. 4/6715 useless extension candidates. Maximal degree in co-relation 66325. Up to 6339 conditions per place. [2024-06-21 16:14:02,804 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 38 changer transitions 0/367 dead transitions. [2024-06-21 16:14:02,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 367 transitions, 4977 flow [2024-06-21 16:14:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:14:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:14:02,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-21 16:14:02,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-21 16:14:02,805 INFO L175 Difference]: Start difference. First operand has 290 places, 331 transitions, 4073 flow. Second operand 10 states and 176 transitions. [2024-06-21 16:14:02,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 367 transitions, 4977 flow [2024-06-21 16:14:05,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 367 transitions, 4776 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:05,110 INFO L231 Difference]: Finished difference. Result has 292 places, 333 transitions, 4094 flow [2024-06-21 16:14:05,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4094, PETRI_PLACES=292, PETRI_TRANSITIONS=333} [2024-06-21 16:14:05,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 16:14:05,111 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 333 transitions, 4094 flow [2024-06-21 16:14:05,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:05,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:05,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:14:05,112 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 16:14:05,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1956236101, now seen corresponding path program 5 times [2024-06-21 16:14:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:05,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250480172] [2024-06-21 16:14:05,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:05,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:05,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250480172] [2024-06-21 16:14:05,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250480172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:05,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976609613] [2024-06-21 16:14:05,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:05,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:05,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:05,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:05,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:05,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 333 transitions, 4094 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:05,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:05,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:05,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:07,202 INFO L124 PetriNetUnfolderBase]: 4441/6804 cut-off events. [2024-06-21 16:14:07,202 INFO L125 PetriNetUnfolderBase]: For 1179133/1179136 co-relation queries the response was YES. [2024-06-21 16:14:07,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66914 conditions, 6804 events. 4441/6804 cut-off events. For 1179133/1179136 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38468 event pairs, 1093 based on Foata normal form. 3/6805 useless extension candidates. Maximal degree in co-relation 66777. Up to 6770 conditions per place. [2024-06-21 16:14:07,295 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 321 selfloop transitions, 19 changer transitions 0/343 dead transitions. [2024-06-21 16:14:07,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 343 transitions, 4798 flow [2024-06-21 16:14:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:07,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-21 16:14:07,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-21 16:14:07,296 INFO L175 Difference]: Start difference. First operand has 292 places, 333 transitions, 4094 flow. Second operand 7 states and 110 transitions. [2024-06-21 16:14:07,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 343 transitions, 4798 flow [2024-06-21 16:14:09,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 343 transitions, 4570 flow, removed 79 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:09,273 INFO L231 Difference]: Finished difference. Result has 291 places, 333 transitions, 3910 flow [2024-06-21 16:14:09,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3866, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3910, PETRI_PLACES=291, PETRI_TRANSITIONS=333} [2024-06-21 16:14:09,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 16:14:09,274 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 333 transitions, 3910 flow [2024-06-21 16:14:09,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:09,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:09,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:09,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:14:09,275 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 16:14:09,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash -306638791, now seen corresponding path program 6 times [2024-06-21 16:14:09,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:09,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277526440] [2024-06-21 16:14:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:09,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:10,035 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 16:14:10,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:10,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277526440] [2024-06-21 16:14:10,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277526440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:10,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:10,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:14:10,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154232365] [2024-06-21 16:14:10,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:10,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:14:10,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:10,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:14:10,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:14:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 333 transitions, 3910 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:11,409 INFO L124 PetriNetUnfolderBase]: 4438/6800 cut-off events. [2024-06-21 16:14:11,409 INFO L125 PetriNetUnfolderBase]: For 1165749/1165752 co-relation queries the response was YES. [2024-06-21 16:14:11,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66149 conditions, 6800 events. 4438/6800 cut-off events. For 1165749/1165752 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38402 event pairs, 1093 based on Foata normal form. 3/6801 useless extension candidates. Maximal degree in co-relation 66011. Up to 6757 conditions per place. [2024-06-21 16:14:11,503 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 27 changer transitions 0/343 dead transitions. [2024-06-21 16:14:11,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 343 transitions, 4614 flow [2024-06-21 16:14:11,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:14:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:14:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:14:11,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-21 16:14:11,504 INFO L175 Difference]: Start difference. First operand has 291 places, 333 transitions, 3910 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:14:11,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 343 transitions, 4614 flow [2024-06-21 16:14:13,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 343 transitions, 4528 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:13,372 INFO L231 Difference]: Finished difference. Result has 292 places, 333 transitions, 3884 flow [2024-06-21 16:14:13,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3824, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3884, PETRI_PLACES=292, PETRI_TRANSITIONS=333} [2024-06-21 16:14:13,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-21 16:14:13,373 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 333 transitions, 3884 flow [2024-06-21 16:14:13,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:13,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:13,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:14:13,374 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 16:14:13,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash -292345063, now seen corresponding path program 1 times [2024-06-21 16:14:13,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694835782] [2024-06-21 16:14:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:14,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:14,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:14,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694835782] [2024-06-21 16:14:14,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694835782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:14,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:14,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:14,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165584909] [2024-06-21 16:14:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:14,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:14,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:14,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:14,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:14,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:14:14,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 333 transitions, 3884 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:14,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:14,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:14:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:15,673 INFO L124 PetriNetUnfolderBase]: 4027/6321 cut-off events. [2024-06-21 16:14:15,673 INFO L125 PetriNetUnfolderBase]: For 1178402/1178412 co-relation queries the response was YES. [2024-06-21 16:14:15,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63070 conditions, 6321 events. 4027/6321 cut-off events. For 1178402/1178412 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 36949 event pairs, 1017 based on Foata normal form. 4/6243 useless extension candidates. Maximal degree in co-relation 62931. Up to 5970 conditions per place. [2024-06-21 16:14:15,763 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 17 changer transitions 0/349 dead transitions. [2024-06-21 16:14:15,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 349 transitions, 4566 flow [2024-06-21 16:14:15,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:15,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:15,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:14:15,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:14:15,764 INFO L175 Difference]: Start difference. First operand has 292 places, 333 transitions, 3884 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:14:15,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 349 transitions, 4566 flow [2024-06-21 16:14:17,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 349 transitions, 4480 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:17,568 INFO L231 Difference]: Finished difference. Result has 294 places, 336 transitions, 3910 flow [2024-06-21 16:14:17,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3910, PETRI_PLACES=294, PETRI_TRANSITIONS=336} [2024-06-21 16:14:17,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 16:14:17,568 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 336 transitions, 3910 flow [2024-06-21 16:14:17,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:17,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:17,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:17,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:14:17,569 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 16:14:17,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1961953989, now seen corresponding path program 3 times [2024-06-21 16:14:17,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:17,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156445829] [2024-06-21 16:14:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:17,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:18,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:18,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156445829] [2024-06-21 16:14:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156445829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:18,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:18,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:18,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006219494] [2024-06-21 16:14:18,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:18,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:14:18,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 336 transitions, 3910 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:18,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:18,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:14:18,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:19,854 INFO L124 PetriNetUnfolderBase]: 4281/6622 cut-off events. [2024-06-21 16:14:19,854 INFO L125 PetriNetUnfolderBase]: For 1187498/1187498 co-relation queries the response was YES. [2024-06-21 16:14:19,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65230 conditions, 6622 events. 4281/6622 cut-off events. For 1187498/1187498 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37951 event pairs, 1062 based on Foata normal form. 1/6601 useless extension candidates. Maximal degree in co-relation 65090. Up to 6438 conditions per place. [2024-06-21 16:14:19,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 300 selfloop transitions, 17 changer transitions 0/347 dead transitions. [2024-06-21 16:14:19,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 347 transitions, 4570 flow [2024-06-21 16:14:19,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:19,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:19,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:14:19,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 16:14:19,949 INFO L175 Difference]: Start difference. First operand has 294 places, 336 transitions, 3910 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:14:19,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 347 transitions, 4570 flow [2024-06-21 16:14:22,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 347 transitions, 4446 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:22,316 INFO L231 Difference]: Finished difference. Result has 296 places, 336 transitions, 3826 flow [2024-06-21 16:14:22,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3826, PETRI_PLACES=296, PETRI_TRANSITIONS=336} [2024-06-21 16:14:22,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 16:14:22,317 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 336 transitions, 3826 flow [2024-06-21 16:14:22,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:22,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:22,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:22,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:14:22,317 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 16:14:22,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:22,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1071383057, now seen corresponding path program 1 times [2024-06-21 16:14:22,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:22,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55493289] [2024-06-21 16:14:22,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55493289] [2024-06-21 16:14:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55493289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:23,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:23,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328878023] [2024-06-21 16:14:23,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:23,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:23,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:23,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 336 transitions, 3826 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:23,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:23,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:23,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:24,696 INFO L124 PetriNetUnfolderBase]: 4433/6793 cut-off events. [2024-06-21 16:14:24,696 INFO L125 PetriNetUnfolderBase]: For 1216598/1216598 co-relation queries the response was YES. [2024-06-21 16:14:24,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66464 conditions, 6793 events. 4433/6793 cut-off events. For 1216598/1216598 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 38369 event pairs, 1083 based on Foata normal form. 2/6794 useless extension candidates. Maximal degree in co-relation 66323. Up to 6737 conditions per place. [2024-06-21 16:14:24,789 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 19 changer transitions 0/360 dead transitions. [2024-06-21 16:14:24,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 360 transitions, 4654 flow [2024-06-21 16:14:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:14:24,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-21 16:14:24,790 INFO L175 Difference]: Start difference. First operand has 296 places, 336 transitions, 3826 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:14:24,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 360 transitions, 4654 flow [2024-06-21 16:14:27,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 360 transitions, 4576 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:14:27,313 INFO L231 Difference]: Finished difference. Result has 296 places, 339 transitions, 3859 flow [2024-06-21 16:14:27,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3859, PETRI_PLACES=296, PETRI_TRANSITIONS=339} [2024-06-21 16:14:27,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 16:14:27,313 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 339 transitions, 3859 flow [2024-06-21 16:14:27,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:27,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:27,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:27,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:14:27,313 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 16:14:27,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2110665187, now seen corresponding path program 1 times [2024-06-21 16:14:27,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:27,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385492080] [2024-06-21 16:14:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:27,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:28,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:28,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385492080] [2024-06-21 16:14:28,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385492080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:28,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:28,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:28,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401575282] [2024-06-21 16:14:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:28,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:28,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:28,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:28,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 339 transitions, 3859 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:28,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:28,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:28,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:29,734 INFO L124 PetriNetUnfolderBase]: 4448/6814 cut-off events. [2024-06-21 16:14:29,735 INFO L125 PetriNetUnfolderBase]: For 1244945/1244945 co-relation queries the response was YES. [2024-06-21 16:14:29,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67293 conditions, 6814 events. 4448/6814 cut-off events. For 1244945/1244945 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38506 event pairs, 1080 based on Foata normal form. 3/6816 useless extension candidates. Maximal degree in co-relation 67151. Up to 6683 conditions per place. [2024-06-21 16:14:29,828 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 325 selfloop transitions, 42 changer transitions 0/370 dead transitions. [2024-06-21 16:14:29,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 370 transitions, 4927 flow [2024-06-21 16:14:29,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:14:29,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-21 16:14:29,829 INFO L175 Difference]: Start difference. First operand has 296 places, 339 transitions, 3859 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:14:29,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 370 transitions, 4927 flow [2024-06-21 16:14:31,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 370 transitions, 4840 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:14:31,810 INFO L231 Difference]: Finished difference. Result has 298 places, 345 transitions, 3952 flow [2024-06-21 16:14:31,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3952, PETRI_PLACES=298, PETRI_TRANSITIONS=345} [2024-06-21 16:14:31,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-21 16:14:31,811 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 345 transitions, 3952 flow [2024-06-21 16:14:31,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:31,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:31,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:31,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:14:31,811 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:31,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2110665001, now seen corresponding path program 2 times [2024-06-21 16:14:31,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:31,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298515328] [2024-06-21 16:14:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:31,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:32,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:32,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298515328] [2024-06-21 16:14:32,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298515328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:32,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:32,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:32,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815159778] [2024-06-21 16:14:32,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:32,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:32,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:32,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:32,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:32,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 345 transitions, 3952 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:32,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:32,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:32,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:34,199 INFO L124 PetriNetUnfolderBase]: 4458/6828 cut-off events. [2024-06-21 16:14:34,199 INFO L125 PetriNetUnfolderBase]: For 1266644/1266644 co-relation queries the response was YES. [2024-06-21 16:14:34,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68153 conditions, 6828 events. 4458/6828 cut-off events. For 1266644/1266644 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 38549 event pairs, 1089 based on Foata normal form. 2/6829 useless extension candidates. Maximal degree in co-relation 68010. Up to 6737 conditions per place. [2024-06-21 16:14:34,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 38 changer transitions 0/372 dead transitions. [2024-06-21 16:14:34,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 372 transitions, 5070 flow [2024-06-21 16:14:34,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:14:34,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 16:14:34,293 INFO L175 Difference]: Start difference. First operand has 298 places, 345 transitions, 3952 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:14:34,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 372 transitions, 5070 flow [2024-06-21 16:14:36,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 372 transitions, 4985 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:36,220 INFO L231 Difference]: Finished difference. Result has 302 places, 351 transitions, 4091 flow [2024-06-21 16:14:36,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3867, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4091, PETRI_PLACES=302, PETRI_TRANSITIONS=351} [2024-06-21 16:14:36,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-21 16:14:36,220 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 351 transitions, 4091 flow [2024-06-21 16:14:36,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:36,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:36,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:36,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:14:36,221 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:36,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:36,221 INFO L85 PathProgramCache]: Analyzing trace with hash 2110844677, now seen corresponding path program 2 times [2024-06-21 16:14:36,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:36,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819053864] [2024-06-21 16:14:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:36,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:36,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:36,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819053864] [2024-06-21 16:14:36,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819053864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:36,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:36,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:36,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14718068] [2024-06-21 16:14:36,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:36,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:37,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:37,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 351 transitions, 4091 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:37,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:37,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:37,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:38,688 INFO L124 PetriNetUnfolderBase]: 4497/6882 cut-off events. [2024-06-21 16:14:38,688 INFO L125 PetriNetUnfolderBase]: For 1312681/1312681 co-relation queries the response was YES. [2024-06-21 16:14:38,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69370 conditions, 6882 events. 4497/6882 cut-off events. For 1312681/1312681 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38894 event pairs, 1088 based on Foata normal form. 3/6884 useless extension candidates. Maximal degree in co-relation 69225. Up to 6732 conditions per place. [2024-06-21 16:14:38,781 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 46 changer transitions 0/380 dead transitions. [2024-06-21 16:14:38,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 380 transitions, 5351 flow [2024-06-21 16:14:38,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:14:38,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:14:38,782 INFO L175 Difference]: Start difference. First operand has 302 places, 351 transitions, 4091 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:14:38,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 380 transitions, 5351 flow [2024-06-21 16:14:41,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 380 transitions, 5248 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:41,376 INFO L231 Difference]: Finished difference. Result has 306 places, 357 transitions, 4154 flow [2024-06-21 16:14:41,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3988, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4154, PETRI_PLACES=306, PETRI_TRANSITIONS=357} [2024-06-21 16:14:41,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-21 16:14:41,376 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 357 transitions, 4154 flow [2024-06-21 16:14:41,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:41,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:41,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:41,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:14:41,377 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:41,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 2110838167, now seen corresponding path program 3 times [2024-06-21 16:14:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993210726] [2024-06-21 16:14:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:41,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993210726] [2024-06-21 16:14:42,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993210726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:42,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:42,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:42,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629101691] [2024-06-21 16:14:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:42,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:42,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:42,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:42,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 357 transitions, 4154 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:42,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:42,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:42,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:43,851 INFO L124 PetriNetUnfolderBase]: 4488/6870 cut-off events. [2024-06-21 16:14:43,852 INFO L125 PetriNetUnfolderBase]: For 1322786/1322786 co-relation queries the response was YES. [2024-06-21 16:14:43,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69306 conditions, 6870 events. 4488/6870 cut-off events. For 1322786/1322786 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38849 event pairs, 1082 based on Foata normal form. 3/6872 useless extension candidates. Maximal degree in co-relation 69159. Up to 6725 conditions per place. [2024-06-21 16:14:43,949 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 45 changer transitions 0/381 dead transitions. [2024-06-21 16:14:43,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 381 transitions, 5164 flow [2024-06-21 16:14:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:14:43,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:14:43,950 INFO L175 Difference]: Start difference. First operand has 306 places, 357 transitions, 4154 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:14:43,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 381 transitions, 5164 flow [2024-06-21 16:14:47,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 381 transitions, 5063 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:14:47,332 INFO L231 Difference]: Finished difference. Result has 310 places, 357 transitions, 4149 flow [2024-06-21 16:14:47,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4149, PETRI_PLACES=310, PETRI_TRANSITIONS=357} [2024-06-21 16:14:47,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 16:14:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 357 transitions, 4149 flow [2024-06-21 16:14:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:47,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:47,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:14:47,334 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:47,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 227449787, now seen corresponding path program 3 times [2024-06-21 16:14:47,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:47,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885986300] [2024-06-21 16:14:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:48,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885986300] [2024-06-21 16:14:48,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885986300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:48,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:48,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:48,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533554377] [2024-06-21 16:14:48,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:48,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:48,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:48,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:48,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:48,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:48,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 357 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:48,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:48,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:48,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:49,805 INFO L124 PetriNetUnfolderBase]: 4498/6884 cut-off events. [2024-06-21 16:14:49,805 INFO L125 PetriNetUnfolderBase]: For 1342497/1342497 co-relation queries the response was YES. [2024-06-21 16:14:49,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69591 conditions, 6884 events. 4498/6884 cut-off events. For 1342497/1342497 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38913 event pairs, 1090 based on Foata normal form. 2/6885 useless extension candidates. Maximal degree in co-relation 69443. Up to 6789 conditions per place. [2024-06-21 16:14:49,902 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 40 changer transitions 0/378 dead transitions. [2024-06-21 16:14:49,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 378 transitions, 5201 flow [2024-06-21 16:14:49,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:14:49,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:14:49,903 INFO L175 Difference]: Start difference. First operand has 310 places, 357 transitions, 4149 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:14:49,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 378 transitions, 5201 flow [2024-06-21 16:14:53,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 378 transitions, 5103 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:14:53,272 INFO L231 Difference]: Finished difference. Result has 311 places, 360 transitions, 4197 flow [2024-06-21 16:14:53,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4197, PETRI_PLACES=311, PETRI_TRANSITIONS=360} [2024-06-21 16:14:53,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 16:14:53,273 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 360 transitions, 4197 flow [2024-06-21 16:14:53,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:53,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:53,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:53,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:14:53,274 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:53,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -2012763673, now seen corresponding path program 4 times [2024-06-21 16:14:53,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:53,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408030371] [2024-06-21 16:14:53,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:53,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:14:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:14:54,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:14:54,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408030371] [2024-06-21 16:14:54,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408030371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:14:54,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:14:54,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:14:54,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381016249] [2024-06-21 16:14:54,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:14:54,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:14:54,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:14:54,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:14:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:14:54,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:14:54,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 360 transitions, 4197 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:54,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:14:54,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:14:54,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:14:55,944 INFO L124 PetriNetUnfolderBase]: 4513/6907 cut-off events. [2024-06-21 16:14:55,944 INFO L125 PetriNetUnfolderBase]: For 1371723/1371726 co-relation queries the response was YES. [2024-06-21 16:14:56,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69925 conditions, 6907 events. 4513/6907 cut-off events. For 1371723/1371726 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 39055 event pairs, 1094 based on Foata normal form. 5/6909 useless extension candidates. Maximal degree in co-relation 69776. Up to 6753 conditions per place. [2024-06-21 16:14:56,035 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 51 changer transitions 0/381 dead transitions. [2024-06-21 16:14:56,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 381 transitions, 5232 flow [2024-06-21 16:14:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:14:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:14:56,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:14:56,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:14:56,036 INFO L175 Difference]: Start difference. First operand has 311 places, 360 transitions, 4197 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:14:56,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 381 transitions, 5232 flow [2024-06-21 16:14:59,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 381 transitions, 5126 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:14:59,537 INFO L231 Difference]: Finished difference. Result has 314 places, 363 transitions, 4236 flow [2024-06-21 16:14:59,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4236, PETRI_PLACES=314, PETRI_TRANSITIONS=363} [2024-06-21 16:14:59,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 16:14:59,538 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 363 transitions, 4236 flow [2024-06-21 16:14:59,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:14:59,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:14:59,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:14:59,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:14:59,539 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:14:59,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:14:59,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1956221469, now seen corresponding path program 5 times [2024-06-21 16:14:59,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:14:59,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647081530] [2024-06-21 16:14:59,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:14:59,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:14:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:00,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:00,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647081530] [2024-06-21 16:15:00,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647081530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:00,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:00,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:00,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255336648] [2024-06-21 16:15:00,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:00,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:00,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:00,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 363 transitions, 4236 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:00,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:00,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:00,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:02,156 INFO L124 PetriNetUnfolderBase]: 4528/6928 cut-off events. [2024-06-21 16:15:02,156 INFO L125 PetriNetUnfolderBase]: For 1397370/1397373 co-relation queries the response was YES. [2024-06-21 16:15:02,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70317 conditions, 6928 events. 4528/6928 cut-off events. For 1397370/1397373 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39181 event pairs, 1090 based on Foata normal form. 5/6930 useless extension candidates. Maximal degree in co-relation 70167. Up to 6767 conditions per place. [2024-06-21 16:15:02,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 51 changer transitions 0/386 dead transitions. [2024-06-21 16:15:02,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 386 transitions, 5295 flow [2024-06-21 16:15:02,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:15:02,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:15:02,250 INFO L175 Difference]: Start difference. First operand has 314 places, 363 transitions, 4236 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:15:02,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 386 transitions, 5295 flow [2024-06-21 16:15:04,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 386 transitions, 5191 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:15:04,326 INFO L231 Difference]: Finished difference. Result has 317 places, 366 transitions, 4283 flow [2024-06-21 16:15:04,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4283, PETRI_PLACES=317, PETRI_TRANSITIONS=366} [2024-06-21 16:15:04,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 16:15:04,326 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 366 transitions, 4283 flow [2024-06-21 16:15:04,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:04,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:04,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:04,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:15:04,327 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:15:04,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:04,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1956228165, now seen corresponding path program 4 times [2024-06-21 16:15:04,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:04,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349585093] [2024-06-21 16:15:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:04,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:05,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:05,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349585093] [2024-06-21 16:15:05,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349585093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:05,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:05,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:05,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474139068] [2024-06-21 16:15:05,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:05,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:05,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:05,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 366 transitions, 4283 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:05,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:05,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:05,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:06,989 INFO L124 PetriNetUnfolderBase]: 4522/6920 cut-off events. [2024-06-21 16:15:06,989 INFO L125 PetriNetUnfolderBase]: For 1407105/1407108 co-relation queries the response was YES. [2024-06-21 16:15:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70249 conditions, 6920 events. 4522/6920 cut-off events. For 1407105/1407108 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39122 event pairs, 1109 based on Foata normal form. 2/6919 useless extension candidates. Maximal degree in co-relation 70098. Up to 6826 conditions per place. [2024-06-21 16:15:07,082 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 40 changer transitions 0/379 dead transitions. [2024-06-21 16:15:07,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 379 transitions, 5069 flow [2024-06-21 16:15:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:07,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:15:07,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:15:07,083 INFO L175 Difference]: Start difference. First operand has 317 places, 366 transitions, 4283 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:15:07,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 379 transitions, 5069 flow [2024-06-21 16:15:10,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 379 transitions, 4874 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:10,613 INFO L231 Difference]: Finished difference. Result has 318 places, 366 transitions, 4174 flow [2024-06-21 16:15:10,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4088, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4174, PETRI_PLACES=318, PETRI_TRANSITIONS=366} [2024-06-21 16:15:10,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 16:15:10,614 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 366 transitions, 4174 flow [2024-06-21 16:15:10,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:10,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:10,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:10,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:15:10,615 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 16:15:10,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1956227979, now seen corresponding path program 6 times [2024-06-21 16:15:10,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:10,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192246205] [2024-06-21 16:15:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:10,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:11,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:11,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192246205] [2024-06-21 16:15:11,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192246205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:11,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:11,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:11,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78152113] [2024-06-21 16:15:11,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:11,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:11,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:11,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:11,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:11,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:11,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 366 transitions, 4174 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:11,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:11,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:11,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:13,232 INFO L124 PetriNetUnfolderBase]: 4513/6908 cut-off events. [2024-06-21 16:15:13,232 INFO L125 PetriNetUnfolderBase]: For 1421069/1421072 co-relation queries the response was YES. [2024-06-21 16:15:13,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69967 conditions, 6908 events. 4513/6908 cut-off events. For 1421069/1421072 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39047 event pairs, 1087 based on Foata normal form. 5/6910 useless extension candidates. Maximal degree in co-relation 69815. Up to 6752 conditions per place. [2024-06-21 16:15:13,320 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 52 changer transitions 0/385 dead transitions. [2024-06-21 16:15:13,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 385 transitions, 4988 flow [2024-06-21 16:15:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:13,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:15:13,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 16:15:13,321 INFO L175 Difference]: Start difference. First operand has 318 places, 366 transitions, 4174 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:15:13,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 385 transitions, 4988 flow [2024-06-21 16:15:17,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 385 transitions, 4840 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:17,315 INFO L231 Difference]: Finished difference. Result has 318 places, 366 transitions, 4136 flow [2024-06-21 16:15:17,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4136, PETRI_PLACES=318, PETRI_TRANSITIONS=366} [2024-06-21 16:15:17,316 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 16:15:17,316 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 366 transitions, 4136 flow [2024-06-21 16:15:17,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:17,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:17,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:17,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:15:17,317 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 16:15:17,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:17,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1947639429, now seen corresponding path program 1 times [2024-06-21 16:15:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:17,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865409217] [2024-06-21 16:15:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:17,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:18,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:18,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865409217] [2024-06-21 16:15:18,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865409217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:18,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:18,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065329837] [2024-06-21 16:15:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:18,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:18,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 16:15:18,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 366 transitions, 4136 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:18,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:18,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 16:15:18,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:20,319 INFO L124 PetriNetUnfolderBase]: 4098/6414 cut-off events. [2024-06-21 16:15:20,319 INFO L125 PetriNetUnfolderBase]: For 1432679/1432692 co-relation queries the response was YES. [2024-06-21 16:15:20,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67064 conditions, 6414 events. 4098/6414 cut-off events. For 1432679/1432692 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37328 event pairs, 1006 based on Foata normal form. 5/6325 useless extension candidates. Maximal degree in co-relation 66911. Up to 6067 conditions per place. [2024-06-21 16:15:20,414 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 309 selfloop transitions, 16 changer transitions 0/381 dead transitions. [2024-06-21 16:15:20,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 381 transitions, 4864 flow [2024-06-21 16:15:20,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:20,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:15:20,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-21 16:15:20,415 INFO L175 Difference]: Start difference. First operand has 318 places, 366 transitions, 4136 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:15:20,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 381 transitions, 4864 flow [2024-06-21 16:15:22,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 381 transitions, 4728 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:15:22,886 INFO L231 Difference]: Finished difference. Result has 318 places, 368 transitions, 4089 flow [2024-06-21 16:15:22,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4089, PETRI_PLACES=318, PETRI_TRANSITIONS=368} [2024-06-21 16:15:22,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-21 16:15:22,887 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 368 transitions, 4089 flow [2024-06-21 16:15:22,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:22,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:22,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:22,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:15:22,887 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 16:15:22,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash -466199323, now seen corresponding path program 1 times [2024-06-21 16:15:22,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:22,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078546937] [2024-06-21 16:15:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:22,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078546937] [2024-06-21 16:15:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078546937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:23,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177273148] [2024-06-21 16:15:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:23,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:24,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:24,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 368 transitions, 4089 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:24,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:24,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:24,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:25,563 INFO L124 PetriNetUnfolderBase]: 4363/6731 cut-off events. [2024-06-21 16:15:25,564 INFO L125 PetriNetUnfolderBase]: For 1462117/1462120 co-relation queries the response was YES. [2024-06-21 16:15:25,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69147 conditions, 6731 events. 4363/6731 cut-off events. For 1462117/1462120 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38351 event pairs, 907 based on Foata normal form. 5/6702 useless extension candidates. Maximal degree in co-relation 68993. Up to 6436 conditions per place. [2024-06-21 16:15:25,661 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 43 changer transitions 0/408 dead transitions. [2024-06-21 16:15:25,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 408 transitions, 5225 flow [2024-06-21 16:15:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:25,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:15:25,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:15:25,662 INFO L175 Difference]: Start difference. First operand has 318 places, 368 transitions, 4089 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:15:25,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 408 transitions, 5225 flow [2024-06-21 16:15:28,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 408 transitions, 5152 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:15:28,535 INFO L231 Difference]: Finished difference. Result has 321 places, 372 transitions, 4195 flow [2024-06-21 16:15:28,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4016, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4195, PETRI_PLACES=321, PETRI_TRANSITIONS=372} [2024-06-21 16:15:28,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-21 16:15:28,535 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 372 transitions, 4195 flow [2024-06-21 16:15:28,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:28,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:28,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:28,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:15:28,536 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 16:15:28,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash -465930212, now seen corresponding path program 1 times [2024-06-21 16:15:28,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:28,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676717466] [2024-06-21 16:15:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:28,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:29,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676717466] [2024-06-21 16:15:29,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676717466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:29,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:29,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795858322] [2024-06-21 16:15:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:29,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:29,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:29,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:29,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 372 transitions, 4195 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:29,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:29,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:29,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:31,155 INFO L124 PetriNetUnfolderBase]: 4373/6745 cut-off events. [2024-06-21 16:15:31,155 INFO L125 PetriNetUnfolderBase]: For 1487077/1487081 co-relation queries the response was YES. [2024-06-21 16:15:31,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69655 conditions, 6745 events. 4373/6745 cut-off events. For 1487077/1487081 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38629 event pairs, 1051 based on Foata normal form. 5/6720 useless extension candidates. Maximal degree in co-relation 69500. Up to 6456 conditions per place. [2024-06-21 16:15:31,252 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 341 selfloop transitions, 53 changer transitions 0/424 dead transitions. [2024-06-21 16:15:31,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 424 transitions, 5475 flow [2024-06-21 16:15:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:15:31,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 16:15:31,254 INFO L175 Difference]: Start difference. First operand has 321 places, 372 transitions, 4195 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:15:31,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 424 transitions, 5475 flow [2024-06-21 16:15:34,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 424 transitions, 5369 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:15:34,698 INFO L231 Difference]: Finished difference. Result has 328 places, 393 transitions, 4466 flow [2024-06-21 16:15:34,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4092, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4466, PETRI_PLACES=328, PETRI_TRANSITIONS=393} [2024-06-21 16:15:34,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 16:15:34,699 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 393 transitions, 4466 flow [2024-06-21 16:15:34,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:34,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:34,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:34,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:15:34,699 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 16:15:34,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash -201586941, now seen corresponding path program 2 times [2024-06-21 16:15:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:34,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821841686] [2024-06-21 16:15:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:35,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:35,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:35,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821841686] [2024-06-21 16:15:35,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821841686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:35,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:35,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:35,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952326682] [2024-06-21 16:15:35,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:35,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:35,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:35,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:35,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:36,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:36,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 393 transitions, 4466 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:36,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:36,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:36,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:37,531 INFO L124 PetriNetUnfolderBase]: 4381/6757 cut-off events. [2024-06-21 16:15:37,531 INFO L125 PetriNetUnfolderBase]: For 1518590/1518593 co-relation queries the response was YES. [2024-06-21 16:15:37,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70648 conditions, 6757 events. 4381/6757 cut-off events. For 1518590/1518593 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 38666 event pairs, 1050 based on Foata normal form. 5/6728 useless extension candidates. Maximal degree in co-relation 70488. Up to 6506 conditions per place. [2024-06-21 16:15:37,632 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 43 changer transitions 0/426 dead transitions. [2024-06-21 16:15:37,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 426 transitions, 5364 flow [2024-06-21 16:15:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:15:37,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:15:37,633 INFO L175 Difference]: Start difference. First operand has 328 places, 393 transitions, 4466 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:15:37,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 426 transitions, 5364 flow [2024-06-21 16:15:41,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 426 transitions, 5272 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-21 16:15:41,639 INFO L231 Difference]: Finished difference. Result has 334 places, 395 transitions, 4497 flow [2024-06-21 16:15:41,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4374, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4497, PETRI_PLACES=334, PETRI_TRANSITIONS=395} [2024-06-21 16:15:41,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-21 16:15:41,640 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 395 transitions, 4497 flow [2024-06-21 16:15:41,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:41,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:41,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:41,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:15:41,640 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 16:15:41,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1140718651, now seen corresponding path program 1 times [2024-06-21 16:15:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:41,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454175563] [2024-06-21 16:15:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:41,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:42,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:42,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454175563] [2024-06-21 16:15:42,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454175563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:42,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:42,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338390991] [2024-06-21 16:15:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:42,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:42,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:42,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:42,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:42,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:42,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 395 transitions, 4497 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:42,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:42,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:42,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:44,223 INFO L124 PetriNetUnfolderBase]: 4547/6955 cut-off events. [2024-06-21 16:15:44,223 INFO L125 PetriNetUnfolderBase]: For 1538160/1538160 co-relation queries the response was YES. [2024-06-21 16:15:44,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72262 conditions, 6955 events. 4547/6955 cut-off events. For 1538160/1538160 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39323 event pairs, 1081 based on Foata normal form. 1/6955 useless extension candidates. Maximal degree in co-relation 72101. Up to 6875 conditions per place. [2024-06-21 16:15:44,321 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 35 changer transitions 0/428 dead transitions. [2024-06-21 16:15:44,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 428 transitions, 5803 flow [2024-06-21 16:15:44,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:15:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:15:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:15:44,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:15:44,323 INFO L175 Difference]: Start difference. First operand has 334 places, 395 transitions, 4497 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:15:44,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 428 transitions, 5803 flow [2024-06-21 16:15:47,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 428 transitions, 5710 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:15:47,513 INFO L231 Difference]: Finished difference. Result has 335 places, 401 transitions, 4662 flow [2024-06-21 16:15:47,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4404, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4662, PETRI_PLACES=335, PETRI_TRANSITIONS=401} [2024-06-21 16:15:47,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 16:15:47,514 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 401 transitions, 4662 flow [2024-06-21 16:15:47,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:47,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:15:47,514 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 16:15:47,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:47,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1147384891, now seen corresponding path program 2 times [2024-06-21 16:15:47,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:47,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906858230] [2024-06-21 16:15:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:47,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:48,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:48,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906858230] [2024-06-21 16:15:48,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906858230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:48,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:48,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:15:48,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626398035] [2024-06-21 16:15:48,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:48,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:15:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:15:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:15:48,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:15:48,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 401 transitions, 4662 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:48,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:48,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:15:48,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:50,125 INFO L124 PetriNetUnfolderBase]: 4552/6962 cut-off events. [2024-06-21 16:15:50,125 INFO L125 PetriNetUnfolderBase]: For 1567879/1567879 co-relation queries the response was YES. [2024-06-21 16:15:50,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72863 conditions, 6962 events. 4552/6962 cut-off events. For 1567879/1567879 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39349 event pairs, 1081 based on Foata normal form. 1/6962 useless extension candidates. Maximal degree in co-relation 72702. Up to 6881 conditions per place. [2024-06-21 16:15:50,221 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 391 selfloop transitions, 39 changer transitions 0/433 dead transitions. [2024-06-21 16:15:50,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 433 transitions, 5902 flow [2024-06-21 16:15:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:15:50,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:15:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-21 16:15:50,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-21 16:15:50,222 INFO L175 Difference]: Start difference. First operand has 335 places, 401 transitions, 4662 flow. Second operand 10 states and 164 transitions. [2024-06-21 16:15:50,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 433 transitions, 5902 flow [2024-06-21 16:15:53,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 433 transitions, 5728 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 16:15:53,234 INFO L231 Difference]: Finished difference. Result has 341 places, 404 transitions, 4666 flow [2024-06-21 16:15:53,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4518, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4666, PETRI_PLACES=341, PETRI_TRANSITIONS=404} [2024-06-21 16:15:53,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 16:15:53,234 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 404 transitions, 4666 flow [2024-06-21 16:15:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:53,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:15:53,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:15:53,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:15:53,235 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 16:15:53,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:15:53,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1299969913, now seen corresponding path program 3 times [2024-06-21 16:15:53,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:15:53,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517767750] [2024-06-21 16:15:53,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:15:53,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:15:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:15:54,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:15:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:15:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517767750] [2024-06-21 16:15:54,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517767750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:15:54,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:15:54,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:15:54,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718551767] [2024-06-21 16:15:54,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:15:54,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:15:54,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:15:54,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:15:54,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:15:54,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:15:54,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 404 transitions, 4666 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:15:54,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:15:54,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:15:54,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:15:55,971 INFO L124 PetriNetUnfolderBase]: 4407/6794 cut-off events. [2024-06-21 16:15:55,971 INFO L125 PetriNetUnfolderBase]: For 1610976/1610980 co-relation queries the response was YES. [2024-06-21 16:15:56,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71953 conditions, 6794 events. 4407/6794 cut-off events. For 1610976/1610980 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 38963 event pairs, 1051 based on Foata normal form. 6/6770 useless extension candidates. Maximal degree in co-relation 71790. Up to 6560 conditions per place. [2024-06-21 16:15:56,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 32 changer transitions 0/431 dead transitions. [2024-06-21 16:15:56,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 431 transitions, 5556 flow [2024-06-21 16:15:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:15:56,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:15:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:15:56,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 16:15:56,077 INFO L175 Difference]: Start difference. First operand has 341 places, 404 transitions, 4666 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:15:56,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 431 transitions, 5556 flow [2024-06-21 16:16:00,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 431 transitions, 5426 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 16:16:00,806 INFO L231 Difference]: Finished difference. Result has 342 places, 406 transitions, 4641 flow [2024-06-21 16:16:00,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4641, PETRI_PLACES=342, PETRI_TRANSITIONS=406} [2024-06-21 16:16:00,806 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 16:16:00,806 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 406 transitions, 4641 flow [2024-06-21 16:16:00,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:00,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:00,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:00,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:16:00,807 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 16:16:00,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1147382256, now seen corresponding path program 2 times [2024-06-21 16:16:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885824673] [2024-06-21 16:16:00,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:00,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:01,945 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 16:16:01,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:01,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885824673] [2024-06-21 16:16:01,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885824673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:01,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:01,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:16:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415747757] [2024-06-21 16:16:01,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:01,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:16:01,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:01,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:16:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:16:02,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:16:02,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 406 transitions, 4641 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:02,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:02,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:16:02,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:03,786 INFO L124 PetriNetUnfolderBase]: 4433/6832 cut-off events. [2024-06-21 16:16:03,786 INFO L125 PetriNetUnfolderBase]: For 1644392/1644396 co-relation queries the response was YES. [2024-06-21 16:16:03,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72434 conditions, 6832 events. 4433/6832 cut-off events. For 1644392/1644396 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 39201 event pairs, 1048 based on Foata normal form. 7/6809 useless extension candidates. Maximal degree in co-relation 72270. Up to 6509 conditions per place. [2024-06-21 16:16:03,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 356 selfloop transitions, 65 changer transitions 0/454 dead transitions. [2024-06-21 16:16:03,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 454 transitions, 5775 flow [2024-06-21 16:16:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:16:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:16:03,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-21 16:16:03,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-21 16:16:03,896 INFO L175 Difference]: Start difference. First operand has 342 places, 406 transitions, 4641 flow. Second operand 10 states and 179 transitions. [2024-06-21 16:16:03,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 454 transitions, 5775 flow [2024-06-21 16:16:07,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 454 transitions, 5670 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 16:16:07,511 INFO L231 Difference]: Finished difference. Result has 345 places, 424 transitions, 4928 flow [2024-06-21 16:16:07,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4928, PETRI_PLACES=345, PETRI_TRANSITIONS=424} [2024-06-21 16:16:07,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 16:16:07,512 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 424 transitions, 4928 flow [2024-06-21 16:16:07,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:07,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:07,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:07,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:16:07,513 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 16:16:07,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1296485017, now seen corresponding path program 3 times [2024-06-21 16:16:07,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:07,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747960473] [2024-06-21 16:16:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:07,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:08,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:08,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747960473] [2024-06-21 16:16:08,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747960473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:08,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:08,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:08,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489314226] [2024-06-21 16:16:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:08,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:08,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:08,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 424 transitions, 4928 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:08,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:08,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:08,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:10,028 INFO L124 PetriNetUnfolderBase]: 4603/7035 cut-off events. [2024-06-21 16:16:10,028 INFO L125 PetriNetUnfolderBase]: For 1654989/1654992 co-relation queries the response was YES. [2024-06-21 16:16:10,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74892 conditions, 7035 events. 4603/7035 cut-off events. For 1654989/1654992 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 39851 event pairs, 1087 based on Foata normal form. 3/7036 useless extension candidates. Maximal degree in co-relation 74726. Up to 6863 conditions per place. [2024-06-21 16:16:10,133 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 384 selfloop transitions, 72 changer transitions 0/459 dead transitions. [2024-06-21 16:16:10,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 459 transitions, 6846 flow [2024-06-21 16:16:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:16:10,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 16:16:10,135 INFO L175 Difference]: Start difference. First operand has 345 places, 424 transitions, 4928 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:16:10,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 459 transitions, 6846 flow [2024-06-21 16:16:14,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 459 transitions, 6662 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:14,097 INFO L231 Difference]: Finished difference. Result has 348 places, 433 transitions, 5182 flow [2024-06-21 16:16:14,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5182, PETRI_PLACES=348, PETRI_TRANSITIONS=433} [2024-06-21 16:16:14,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 16:16:14,098 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 433 transitions, 5182 flow [2024-06-21 16:16:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:14,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:14,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:14,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:16:14,098 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 16:16:14,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1256188567, now seen corresponding path program 1 times [2024-06-21 16:16:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444629500] [2024-06-21 16:16:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:14,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:14,914 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 16:16:14,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444629500] [2024-06-21 16:16:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444629500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136123882] [2024-06-21 16:16:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:14,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:14,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:14,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:14,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:15,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 433 transitions, 5182 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:15,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:15,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:15,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:16,548 INFO L124 PetriNetUnfolderBase]: 4616/7054 cut-off events. [2024-06-21 16:16:16,548 INFO L125 PetriNetUnfolderBase]: For 1690018/1690021 co-relation queries the response was YES. [2024-06-21 16:16:16,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75436 conditions, 7054 events. 4616/7054 cut-off events. For 1690018/1690021 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39994 event pairs, 1093 based on Foata normal form. 3/7054 useless extension candidates. Maximal degree in co-relation 75269. Up to 6891 conditions per place. [2024-06-21 16:16:16,660 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 63 changer transitions 0/467 dead transitions. [2024-06-21 16:16:16,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 467 transitions, 6790 flow [2024-06-21 16:16:16,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:16:16,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:16:16,661 INFO L175 Difference]: Start difference. First operand has 348 places, 433 transitions, 5182 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:16:16,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 467 transitions, 6790 flow [2024-06-21 16:16:20,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 467 transitions, 6597 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:20,597 INFO L231 Difference]: Finished difference. Result has 353 places, 442 transitions, 5301 flow [2024-06-21 16:16:20,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4995, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5301, PETRI_PLACES=353, PETRI_TRANSITIONS=442} [2024-06-21 16:16:20,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 16:16:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 442 transitions, 5301 flow [2024-06-21 16:16:20,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:20,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:20,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:20,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:16:20,598 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 16:16:20,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash -422732774, now seen corresponding path program 1 times [2024-06-21 16:16:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239546166] [2024-06-21 16:16:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:20,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:21,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:21,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239546166] [2024-06-21 16:16:21,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239546166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:21,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:21,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:21,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182966045] [2024-06-21 16:16:21,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:21,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:21,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:21,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:21,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 442 transitions, 5301 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:21,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:21,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:21,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:23,146 INFO L124 PetriNetUnfolderBase]: 4671/7129 cut-off events. [2024-06-21 16:16:23,146 INFO L125 PetriNetUnfolderBase]: For 1762192/1762195 co-relation queries the response was YES. [2024-06-21 16:16:23,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77137 conditions, 7129 events. 4671/7129 cut-off events. For 1762192/1762195 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 40394 event pairs, 1096 based on Foata normal form. 5/7132 useless extension candidates. Maximal degree in co-relation 76968. Up to 6935 conditions per place. [2024-06-21 16:16:23,255 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 63 changer transitions 0/486 dead transitions. [2024-06-21 16:16:23,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 486 transitions, 7034 flow [2024-06-21 16:16:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 16:16:23,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 16:16:23,256 INFO L175 Difference]: Start difference. First operand has 353 places, 442 transitions, 5301 flow. Second operand 8 states and 145 transitions. [2024-06-21 16:16:23,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 486 transitions, 7034 flow [2024-06-21 16:16:28,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 486 transitions, 6906 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-21 16:16:28,827 INFO L231 Difference]: Finished difference. Result has 359 places, 458 transitions, 5590 flow [2024-06-21 16:16:28,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5590, PETRI_PLACES=359, PETRI_TRANSITIONS=458} [2024-06-21 16:16:28,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 16:16:28,827 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 458 transitions, 5590 flow [2024-06-21 16:16:28,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:28,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:28,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:28,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:16:28,827 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:28,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:28,828 INFO L85 PathProgramCache]: Analyzing trace with hash 537206991, now seen corresponding path program 2 times [2024-06-21 16:16:28,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:28,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404793739] [2024-06-21 16:16:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:28,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:29,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:29,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404793739] [2024-06-21 16:16:29,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404793739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:29,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:29,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:29,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410932513] [2024-06-21 16:16:29,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:29,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:29,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:29,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 458 transitions, 5590 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:29,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:29,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:29,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:31,333 INFO L124 PetriNetUnfolderBase]: 4676/7137 cut-off events. [2024-06-21 16:16:31,333 INFO L125 PetriNetUnfolderBase]: For 1780751/1780754 co-relation queries the response was YES. [2024-06-21 16:16:31,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78048 conditions, 7137 events. 4676/7137 cut-off events. For 1780751/1780754 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40479 event pairs, 1094 based on Foata normal form. 3/7137 useless extension candidates. Maximal degree in co-relation 77876. Up to 6973 conditions per place. [2024-06-21 16:16:31,449 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 64 changer transitions 0/483 dead transitions. [2024-06-21 16:16:31,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 483 transitions, 7088 flow [2024-06-21 16:16:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:31,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:16:31,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:16:31,450 INFO L175 Difference]: Start difference. First operand has 359 places, 458 transitions, 5590 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:16:31,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 483 transitions, 7088 flow [2024-06-21 16:16:36,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 483 transitions, 6996 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-21 16:16:36,259 INFO L231 Difference]: Finished difference. Result has 365 places, 461 transitions, 5664 flow [2024-06-21 16:16:36,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5664, PETRI_PLACES=365, PETRI_TRANSITIONS=461} [2024-06-21 16:16:36,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-21 16:16:36,260 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 461 transitions, 5664 flow [2024-06-21 16:16:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:36,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:36,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:36,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:16:36,260 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:36,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -347719927, now seen corresponding path program 4 times [2024-06-21 16:16:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:36,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193886904] [2024-06-21 16:16:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:37,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:37,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193886904] [2024-06-21 16:16:37,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193886904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:37,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:37,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:37,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104216267] [2024-06-21 16:16:37,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:37,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:37,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:37,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:37,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:37,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:37,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 461 transitions, 5664 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:37,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:37,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:37,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:38,707 INFO L124 PetriNetUnfolderBase]: 4681/7143 cut-off events. [2024-06-21 16:16:38,707 INFO L125 PetriNetUnfolderBase]: For 1808364/1808367 co-relation queries the response was YES. [2024-06-21 16:16:38,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78312 conditions, 7143 events. 4681/7143 cut-off events. For 1808364/1808367 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40522 event pairs, 1092 based on Foata normal form. 3/7144 useless extension candidates. Maximal degree in co-relation 78137. Up to 6970 conditions per place. [2024-06-21 16:16:38,823 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 409 selfloop transitions, 74 changer transitions 0/486 dead transitions. [2024-06-21 16:16:38,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 486 transitions, 7200 flow [2024-06-21 16:16:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:38,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:16:38,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 16:16:38,824 INFO L175 Difference]: Start difference. First operand has 365 places, 461 transitions, 5664 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:16:38,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 486 transitions, 7200 flow [2024-06-21 16:16:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 486 transitions, 7102 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:42,803 INFO L231 Difference]: Finished difference. Result has 369 places, 464 transitions, 5780 flow [2024-06-21 16:16:42,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5566, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5780, PETRI_PLACES=369, PETRI_TRANSITIONS=464} [2024-06-21 16:16:42,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 16:16:42,803 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 464 transitions, 5780 flow [2024-06-21 16:16:42,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:42,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:42,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:16:42,804 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:42,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -970955389, now seen corresponding path program 3 times [2024-06-21 16:16:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:42,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085152371] [2024-06-21 16:16:42,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:42,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085152371] [2024-06-21 16:16:43,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085152371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:43,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:43,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:43,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743395588] [2024-06-21 16:16:43,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:43,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:43,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:43,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:43,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 464 transitions, 5780 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:43,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:43,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:43,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:45,241 INFO L124 PetriNetUnfolderBase]: 4694/7162 cut-off events. [2024-06-21 16:16:45,242 INFO L125 PetriNetUnfolderBase]: For 1844223/1844226 co-relation queries the response was YES. [2024-06-21 16:16:45,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78859 conditions, 7162 events. 4694/7162 cut-off events. For 1844223/1844226 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 40647 event pairs, 1099 based on Foata normal form. 3/7162 useless extension candidates. Maximal degree in co-relation 78683. Up to 6995 conditions per place. [2024-06-21 16:16:45,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 414 selfloop transitions, 72 changer transitions 0/489 dead transitions. [2024-06-21 16:16:45,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 489 transitions, 7346 flow [2024-06-21 16:16:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:16:45,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 16:16:45,358 INFO L175 Difference]: Start difference. First operand has 369 places, 464 transitions, 5780 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:16:45,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 489 transitions, 7346 flow [2024-06-21 16:16:50,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 489 transitions, 7182 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:16:50,292 INFO L231 Difference]: Finished difference. Result has 372 places, 470 transitions, 5854 flow [2024-06-21 16:16:50,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5616, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5854, PETRI_PLACES=372, PETRI_TRANSITIONS=470} [2024-06-21 16:16:50,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-21 16:16:50,292 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 470 transitions, 5854 flow [2024-06-21 16:16:50,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:50,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:50,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:16:50,293 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1462991551, now seen corresponding path program 5 times [2024-06-21 16:16:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937716628] [2024-06-21 16:16:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:51,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:51,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937716628] [2024-06-21 16:16:51,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937716628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:51,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:51,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:51,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937654973] [2024-06-21 16:16:51,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:51,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:51,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:51,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:51,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:51,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:51,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 470 transitions, 5854 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:16:52,804 INFO L124 PetriNetUnfolderBase]: 4715/7190 cut-off events. [2024-06-21 16:16:52,804 INFO L125 PetriNetUnfolderBase]: For 1888094/1888097 co-relation queries the response was YES. [2024-06-21 16:16:52,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79651 conditions, 7190 events. 4715/7190 cut-off events. For 1888094/1888097 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40800 event pairs, 1087 based on Foata normal form. 3/7191 useless extension candidates. Maximal degree in co-relation 79474. Up to 7012 conditions per place. [2024-06-21 16:16:52,924 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 83 changer transitions 0/499 dead transitions. [2024-06-21 16:16:52,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 499 transitions, 7813 flow [2024-06-21 16:16:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:16:52,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:16:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:16:52,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:16:52,925 INFO L175 Difference]: Start difference. First operand has 372 places, 470 transitions, 5854 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:16:52,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 499 transitions, 7813 flow [2024-06-21 16:16:58,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 499 transitions, 7705 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:16:58,199 INFO L231 Difference]: Finished difference. Result has 376 places, 479 transitions, 6141 flow [2024-06-21 16:16:58,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6141, PETRI_PLACES=376, PETRI_TRANSITIONS=479} [2024-06-21 16:16:58,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-21 16:16:58,200 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 479 transitions, 6141 flow [2024-06-21 16:16:58,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:58,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:16:58,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:16:58,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:16:58,200 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:16:58,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:16:58,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1462991954, now seen corresponding path program 2 times [2024-06-21 16:16:58,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:16:58,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258859034] [2024-06-21 16:16:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:16:58,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:16:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:16:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:16:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:16:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258859034] [2024-06-21 16:16:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258859034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:16:59,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:16:59,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:16:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7580631] [2024-06-21 16:16:59,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:16:59,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:16:59,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:16:59,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:16:59,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:16:59,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:16:59,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 479 transitions, 6141 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:16:59,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:16:59,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:16:59,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:00,721 INFO L124 PetriNetUnfolderBase]: 4778/7277 cut-off events. [2024-06-21 16:17:00,722 INFO L125 PetriNetUnfolderBase]: For 1975256/1975259 co-relation queries the response was YES. [2024-06-21 16:17:00,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81432 conditions, 7277 events. 4778/7277 cut-off events. For 1975256/1975259 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41329 event pairs, 1095 based on Foata normal form. 5/7280 useless extension candidates. Maximal degree in co-relation 81254. Up to 7052 conditions per place. [2024-06-21 16:17:00,845 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 446 selfloop transitions, 70 changer transitions 0/519 dead transitions. [2024-06-21 16:17:00,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 519 transitions, 8174 flow [2024-06-21 16:17:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:00,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 16:17:00,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 16:17:00,846 INFO L175 Difference]: Start difference. First operand has 376 places, 479 transitions, 6141 flow. Second operand 8 states and 146 transitions. [2024-06-21 16:17:00,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 519 transitions, 8174 flow [2024-06-21 16:17:07,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 519 transitions, 8016 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:07,338 INFO L231 Difference]: Finished difference. Result has 381 places, 490 transitions, 6343 flow [2024-06-21 16:17:07,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6343, PETRI_PLACES=381, PETRI_TRANSITIONS=490} [2024-06-21 16:17:07,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-21 16:17:07,339 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 490 transitions, 6343 flow [2024-06-21 16:17:07,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:07,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:07,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:07,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:17:07,339 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:07,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1462986901, now seen corresponding path program 6 times [2024-06-21 16:17:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:07,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876401485] [2024-06-21 16:17:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:07,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:07,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:08,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:08,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876401485] [2024-06-21 16:17:08,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876401485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:08,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:08,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814717809] [2024-06-21 16:17:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:08,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:08,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:08,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:08,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:08,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 490 transitions, 6343 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:08,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:08,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:08,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:10,036 INFO L124 PetriNetUnfolderBase]: 4775/7272 cut-off events. [2024-06-21 16:17:10,036 INFO L125 PetriNetUnfolderBase]: For 1985124/1985124 co-relation queries the response was YES. [2024-06-21 16:17:10,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81542 conditions, 7272 events. 4775/7272 cut-off events. For 1985124/1985124 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 41238 event pairs, 1088 based on Foata normal form. 1/7272 useless extension candidates. Maximal degree in co-relation 81363. Up to 7209 conditions per place. [2024-06-21 16:17:10,156 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 475 selfloop transitions, 29 changer transitions 0/507 dead transitions. [2024-06-21 16:17:10,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 507 transitions, 7393 flow [2024-06-21 16:17:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:17:10,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-21 16:17:10,157 INFO L175 Difference]: Start difference. First operand has 381 places, 490 transitions, 6343 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:17:10,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 507 transitions, 7393 flow [2024-06-21 16:17:15,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 507 transitions, 7206 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-21 16:17:15,367 INFO L231 Difference]: Finished difference. Result has 386 places, 490 transitions, 6220 flow [2024-06-21 16:17:15,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6220, PETRI_PLACES=386, PETRI_TRANSITIONS=490} [2024-06-21 16:17:15,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 343 predicate places. [2024-06-21 16:17:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 490 transitions, 6220 flow [2024-06-21 16:17:15,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:15,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:15,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:15,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:17:15,368 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:15,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:15,368 INFO L85 PathProgramCache]: Analyzing trace with hash -140799174, now seen corresponding path program 3 times [2024-06-21 16:17:15,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:15,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689885449] [2024-06-21 16:17:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:15,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:16,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:16,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689885449] [2024-06-21 16:17:16,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689885449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:16,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:16,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:17:16,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505032990] [2024-06-21 16:17:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:16,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:17:16,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:16,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:17:16,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:17:16,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:17:16,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 490 transitions, 6220 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:16,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:16,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:17:16,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:18,114 INFO L124 PetriNetUnfolderBase]: 4766/7261 cut-off events. [2024-06-21 16:17:18,114 INFO L125 PetriNetUnfolderBase]: For 2007222/2007225 co-relation queries the response was YES. [2024-06-21 16:17:18,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80961 conditions, 7261 events. 4766/7261 cut-off events. For 2007222/2007225 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41157 event pairs, 1093 based on Foata normal form. 5/7264 useless extension candidates. Maximal degree in co-relation 80781. Up to 7041 conditions per place. [2024-06-21 16:17:18,220 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 441 selfloop transitions, 72 changer transitions 0/516 dead transitions. [2024-06-21 16:17:18,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 516 transitions, 7797 flow [2024-06-21 16:17:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:17:18,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:17:18,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:17:18,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-21 16:17:18,222 INFO L175 Difference]: Start difference. First operand has 386 places, 490 transitions, 6220 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:17:18,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 516 transitions, 7797 flow [2024-06-21 16:17:23,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 516 transitions, 7709 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:23,500 INFO L231 Difference]: Finished difference. Result has 388 places, 490 transitions, 6283 flow [2024-06-21 16:17:23,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6283, PETRI_PLACES=388, PETRI_TRANSITIONS=490} [2024-06-21 16:17:23,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-21 16:17:23,501 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 490 transitions, 6283 flow [2024-06-21 16:17:23,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:23,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:23,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:23,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:17:23,501 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:23,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1456657816, now seen corresponding path program 1 times [2024-06-21 16:17:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624764448] [2024-06-21 16:17:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:25,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:25,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624764448] [2024-06-21 16:17:25,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624764448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:25,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:25,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:17:25,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121392138] [2024-06-21 16:17:25,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:25,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:17:25,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:25,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:17:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:17:25,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:17:25,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 490 transitions, 6283 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:25,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:25,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:17:25,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:27,502 INFO L124 PetriNetUnfolderBase]: 4646/7130 cut-off events. [2024-06-21 16:17:27,502 INFO L125 PetriNetUnfolderBase]: For 2021902/2021905 co-relation queries the response was YES. [2024-06-21 16:17:27,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79488 conditions, 7130 events. 4646/7130 cut-off events. For 2021902/2021905 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40839 event pairs, 939 based on Foata normal form. 12/7139 useless extension candidates. Maximal degree in co-relation 79307. Up to 6410 conditions per place. [2024-06-21 16:17:27,622 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 409 selfloop transitions, 79 changer transitions 0/537 dead transitions. [2024-06-21 16:17:27,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 537 transitions, 7416 flow [2024-06-21 16:17:27,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-21 16:17:27,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-21 16:17:27,623 INFO L175 Difference]: Start difference. First operand has 388 places, 490 transitions, 6283 flow. Second operand 11 states and 208 transitions. [2024-06-21 16:17:27,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 537 transitions, 7416 flow [2024-06-21 16:17:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 537 transitions, 7250 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:17:31,199 INFO L231 Difference]: Finished difference. Result has 393 places, 490 transitions, 6281 flow [2024-06-21 16:17:31,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6117, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6281, PETRI_PLACES=393, PETRI_TRANSITIONS=490} [2024-06-21 16:17:31,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 16:17:31,199 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 490 transitions, 6281 flow [2024-06-21 16:17:31,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:31,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:31,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:31,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:17:31,200 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:31,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1130673542, now seen corresponding path program 2 times [2024-06-21 16:17:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:31,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143574192] [2024-06-21 16:17:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:31,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:17:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:32,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143574192] [2024-06-21 16:17:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143574192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:17:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006201006] [2024-06-21 16:17:32,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:32,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:17:32,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:17:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:17:32,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:17:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 490 transitions, 6281 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:32,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:17:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:35,126 INFO L124 PetriNetUnfolderBase]: 4694/7208 cut-off events. [2024-06-21 16:17:35,126 INFO L125 PetriNetUnfolderBase]: For 2078701/2078704 co-relation queries the response was YES. [2024-06-21 16:17:35,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80862 conditions, 7208 events. 4694/7208 cut-off events. For 2078701/2078704 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41459 event pairs, 956 based on Foata normal form. 12/7207 useless extension candidates. Maximal degree in co-relation 80680. Up to 6388 conditions per place. [2024-06-21 16:17:35,245 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 393 selfloop transitions, 94 changer transitions 0/536 dead transitions. [2024-06-21 16:17:35,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 536 transitions, 7491 flow [2024-06-21 16:17:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:17:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:17:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-21 16:17:35,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-21 16:17:35,246 INFO L175 Difference]: Start difference. First operand has 393 places, 490 transitions, 6281 flow. Second operand 11 states and 206 transitions. [2024-06-21 16:17:35,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 536 transitions, 7491 flow [2024-06-21 16:17:40,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 536 transitions, 7298 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 16:17:40,690 INFO L231 Difference]: Finished difference. Result has 394 places, 491 transitions, 6378 flow [2024-06-21 16:17:40,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6378, PETRI_PLACES=394, PETRI_TRANSITIONS=491} [2024-06-21 16:17:40,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 16:17:40,690 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 491 transitions, 6378 flow [2024-06-21 16:17:40,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:40,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:40,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:40,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:17:40,690 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:40,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:40,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1462880106, now seen corresponding path program 3 times [2024-06-21 16:17:40,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:40,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144820484] [2024-06-21 16:17:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:41,867 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 16:17:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:41,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144820484] [2024-06-21 16:17:41,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144820484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:41,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:41,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:41,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618786858] [2024-06-21 16:17:41,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:41,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:41,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:41,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:41,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:17:41,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 491 transitions, 6378 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:41,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:41,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:17:41,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:43,723 INFO L124 PetriNetUnfolderBase]: 4660/7169 cut-off events. [2024-06-21 16:17:43,724 INFO L125 PetriNetUnfolderBase]: For 2052804/2052808 co-relation queries the response was YES. [2024-06-21 16:17:43,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80255 conditions, 7169 events. 4660/7169 cut-off events. For 2052804/2052808 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41453 event pairs, 1068 based on Foata normal form. 3/7142 useless extension candidates. Maximal degree in co-relation 80072. Up to 6784 conditions per place. [2024-06-21 16:17:43,842 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 416 selfloop transitions, 71 changer transitions 0/536 dead transitions. [2024-06-21 16:17:43,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 536 transitions, 7658 flow [2024-06-21 16:17:43,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:17:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:17:43,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:17:43,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 16:17:43,843 INFO L175 Difference]: Start difference. First operand has 394 places, 491 transitions, 6378 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:17:43,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 536 transitions, 7658 flow [2024-06-21 16:17:49,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 536 transitions, 7400 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-21 16:17:49,770 INFO L231 Difference]: Finished difference. Result has 396 places, 508 transitions, 6543 flow [2024-06-21 16:17:49,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6543, PETRI_PLACES=396, PETRI_TRANSITIONS=508} [2024-06-21 16:17:49,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-21 16:17:49,771 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 508 transitions, 6543 flow [2024-06-21 16:17:49,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:49,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:49,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:49,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:17:49,771 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:49,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1462868946, now seen corresponding path program 4 times [2024-06-21 16:17:49,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:49,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635106512] [2024-06-21 16:17:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:49,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:50,914 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 16:17:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635106512] [2024-06-21 16:17:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635106512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172751383] [2024-06-21 16:17:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:50,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:50,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:51,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:17:51,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 508 transitions, 6543 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:51,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:51,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:17:51,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:17:52,982 INFO L124 PetriNetUnfolderBase]: 4693/7215 cut-off events. [2024-06-21 16:17:52,982 INFO L125 PetriNetUnfolderBase]: For 2080504/2080506 co-relation queries the response was YES. [2024-06-21 16:17:53,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81436 conditions, 7215 events. 4693/7215 cut-off events. For 2080504/2080506 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41763 event pairs, 1050 based on Foata normal form. 1/7190 useless extension candidates. Maximal degree in co-relation 81250. Up to 6820 conditions per place. [2024-06-21 16:17:53,104 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 420 selfloop transitions, 78 changer transitions 0/547 dead transitions. [2024-06-21 16:17:53,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 547 transitions, 8095 flow [2024-06-21 16:17:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:17:53,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:17:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 16:17:53,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 16:17:53,105 INFO L175 Difference]: Start difference. First operand has 396 places, 508 transitions, 6543 flow. Second operand 10 states and 181 transitions. [2024-06-21 16:17:53,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 547 transitions, 8095 flow [2024-06-21 16:17:57,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 547 transitions, 7919 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-21 16:17:57,036 INFO L231 Difference]: Finished difference. Result has 405 places, 517 transitions, 6779 flow [2024-06-21 16:17:57,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6367, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6779, PETRI_PLACES=405, PETRI_TRANSITIONS=517} [2024-06-21 16:17:57,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 16:17:57,036 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 517 transitions, 6779 flow [2024-06-21 16:17:57,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:57,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:17:57,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:17:57,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:17:57,037 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:17:57,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:17:57,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1462868605, now seen corresponding path program 4 times [2024-06-21 16:17:57,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:17:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929052024] [2024-06-21 16:17:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:17:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:17:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:17:58,136 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 16:17:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:17:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929052024] [2024-06-21 16:17:58,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929052024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:17:58,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:17:58,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:17:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045784505] [2024-06-21 16:17:58,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:17:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:17:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:17:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:17:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:17:58,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:17:58,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 517 transitions, 6779 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:17:58,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:17:58,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:17:58,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:00,130 INFO L124 PetriNetUnfolderBase]: 4701/7227 cut-off events. [2024-06-21 16:18:00,130 INFO L125 PetriNetUnfolderBase]: For 2124056/2124058 co-relation queries the response was YES. [2024-06-21 16:18:00,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82147 conditions, 7227 events. 4701/7227 cut-off events. For 2124056/2124058 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41820 event pairs, 1063 based on Foata normal form. 2/7203 useless extension candidates. Maximal degree in co-relation 81958. Up to 6944 conditions per place. [2024-06-21 16:18:00,252 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 31 changer transitions 0/538 dead transitions. [2024-06-21 16:18:00,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 538 transitions, 7839 flow [2024-06-21 16:18:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 16:18:00,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 16:18:00,254 INFO L175 Difference]: Start difference. First operand has 405 places, 517 transitions, 6779 flow. Second operand 9 states and 150 transitions. [2024-06-21 16:18:00,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 538 transitions, 7839 flow [2024-06-21 16:18:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 538 transitions, 7699 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:04,581 INFO L231 Difference]: Finished difference. Result has 408 places, 519 transitions, 6746 flow [2024-06-21 16:18:04,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6639, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6746, PETRI_PLACES=408, PETRI_TRANSITIONS=519} [2024-06-21 16:18:04,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-21 16:18:04,582 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 519 transitions, 6746 flow [2024-06-21 16:18:04,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:04,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:04,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:04,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:18:04,583 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:04,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash -140803142, now seen corresponding path program 5 times [2024-06-21 16:18:04,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:04,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38691191] [2024-06-21 16:18:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:04,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:05,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38691191] [2024-06-21 16:18:05,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38691191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:05,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:05,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:18:05,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955610847] [2024-06-21 16:18:05,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:05,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:18:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:18:05,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:18:05,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:18:05,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 519 transitions, 6746 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:05,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:05,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:18:05,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:07,721 INFO L124 PetriNetUnfolderBase]: 4696/7219 cut-off events. [2024-06-21 16:18:07,721 INFO L125 PetriNetUnfolderBase]: For 2139040/2139042 co-relation queries the response was YES. [2024-06-21 16:18:07,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81899 conditions, 7219 events. 4696/7219 cut-off events. For 2139040/2139042 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41822 event pairs, 1050 based on Foata normal form. 3/7196 useless extension candidates. Maximal degree in co-relation 81708. Up to 6841 conditions per place. [2024-06-21 16:18:07,847 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 67 changer transitions 0/544 dead transitions. [2024-06-21 16:18:07,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 544 transitions, 7811 flow [2024-06-21 16:18:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:18:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:18:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 16:18:07,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 16:18:07,848 INFO L175 Difference]: Start difference. First operand has 408 places, 519 transitions, 6746 flow. Second operand 9 states and 161 transitions. [2024-06-21 16:18:07,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 544 transitions, 7811 flow [2024-06-21 16:18:12,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 544 transitions, 7620 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:12,312 INFO L231 Difference]: Finished difference. Result has 409 places, 519 transitions, 6699 flow [2024-06-21 16:18:12,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6555, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6699, PETRI_PLACES=409, PETRI_TRANSITIONS=519} [2024-06-21 16:18:12,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 16:18:12,313 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 519 transitions, 6699 flow [2024-06-21 16:18:12,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:12,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:12,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:12,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:18:12,313 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:12,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:12,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1695269441, now seen corresponding path program 4 times [2024-06-21 16:18:12,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:12,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73727576] [2024-06-21 16:18:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:12,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:13,035 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 16:18:13,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:13,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73727576] [2024-06-21 16:18:13,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73727576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:13,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:13,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:13,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555439928] [2024-06-21 16:18:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:13,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:13,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:13,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:13,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 519 transitions, 6699 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:13,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:13,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:13,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:14,989 INFO L124 PetriNetUnfolderBase]: 4868/7413 cut-off events. [2024-06-21 16:18:14,989 INFO L125 PetriNetUnfolderBase]: For 2166108/2166108 co-relation queries the response was YES. [2024-06-21 16:18:15,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83590 conditions, 7413 events. 4868/7413 cut-off events. For 2166108/2166108 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 42298 event pairs, 1084 based on Foata normal form. 1/7413 useless extension candidates. Maximal degree in co-relation 83398. Up to 7345 conditions per place. [2024-06-21 16:18:15,120 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 35 changer transitions 0/546 dead transitions. [2024-06-21 16:18:15,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 546 transitions, 8193 flow [2024-06-21 16:18:15,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:18:15,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 16:18:15,121 INFO L175 Difference]: Start difference. First operand has 409 places, 519 transitions, 6699 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:18:15,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 546 transitions, 8193 flow [2024-06-21 16:18:19,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 546 transitions, 8036 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:19,600 INFO L231 Difference]: Finished difference. Result has 410 places, 525 transitions, 6744 flow [2024-06-21 16:18:19,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6744, PETRI_PLACES=410, PETRI_TRANSITIONS=525} [2024-06-21 16:18:19,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 16:18:19,600 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 525 transitions, 6744 flow [2024-06-21 16:18:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:19,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:19,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:19,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:18:19,601 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:19,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1694911391, now seen corresponding path program 5 times [2024-06-21 16:18:19,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:19,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974337211] [2024-06-21 16:18:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:19,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:20,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:20,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974337211] [2024-06-21 16:18:20,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974337211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:20,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:20,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11130559] [2024-06-21 16:18:20,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:20,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:20,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:20,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:20,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:20,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:20,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 525 transitions, 6744 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:20,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:20,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:20,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:22,281 INFO L124 PetriNetUnfolderBase]: 4873/7420 cut-off events. [2024-06-21 16:18:22,281 INFO L125 PetriNetUnfolderBase]: For 2198193/2198193 co-relation queries the response was YES. [2024-06-21 16:18:22,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83850 conditions, 7420 events. 4873/7420 cut-off events. For 2198193/2198193 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42328 event pairs, 1081 based on Foata normal form. 1/7420 useless extension candidates. Maximal degree in co-relation 83656. Up to 7369 conditions per place. [2024-06-21 16:18:22,403 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 512 selfloop transitions, 30 changer transitions 0/545 dead transitions. [2024-06-21 16:18:22,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 545 transitions, 7935 flow [2024-06-21 16:18:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:18:22,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:18:22,404 INFO L175 Difference]: Start difference. First operand has 410 places, 525 transitions, 6744 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:18:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 545 transitions, 7935 flow [2024-06-21 16:18:26,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 545 transitions, 7810 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:18:27,003 INFO L231 Difference]: Finished difference. Result has 413 places, 528 transitions, 6756 flow [2024-06-21 16:18:27,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6640, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6756, PETRI_PLACES=413, PETRI_TRANSITIONS=528} [2024-06-21 16:18:27,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 16:18:27,003 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 528 transitions, 6756 flow [2024-06-21 16:18:27,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:27,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:27,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:18:27,004 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:27,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1923170591, now seen corresponding path program 6 times [2024-06-21 16:18:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:27,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40689723] [2024-06-21 16:18:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:27,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:27,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40689723] [2024-06-21 16:18:27,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40689723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:27,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:27,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110904444] [2024-06-21 16:18:27,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:27,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:27,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:27,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:27,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 528 transitions, 6756 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:27,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:27,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:27,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:29,628 INFO L124 PetriNetUnfolderBase]: 4878/7427 cut-off events. [2024-06-21 16:18:29,628 INFO L125 PetriNetUnfolderBase]: For 2230378/2230378 co-relation queries the response was YES. [2024-06-21 16:18:29,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84087 conditions, 7427 events. 4878/7427 cut-off events. For 2230378/2230378 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42349 event pairs, 1081 based on Foata normal form. 1/7427 useless extension candidates. Maximal degree in co-relation 83892. Up to 7318 conditions per place. [2024-06-21 16:18:29,750 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 493 selfloop transitions, 57 changer transitions 0/553 dead transitions. [2024-06-21 16:18:29,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 553 transitions, 8476 flow [2024-06-21 16:18:29,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:18:29,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:18:29,751 INFO L175 Difference]: Start difference. First operand has 413 places, 528 transitions, 6756 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:18:29,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 553 transitions, 8476 flow [2024-06-21 16:18:34,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 553 transitions, 8400 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:18:34,854 INFO L231 Difference]: Finished difference. Result has 415 places, 531 transitions, 6854 flow [2024-06-21 16:18:34,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6680, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6854, PETRI_PLACES=415, PETRI_TRANSITIONS=531} [2024-06-21 16:18:34,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 16:18:34,854 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 531 transitions, 6854 flow [2024-06-21 16:18:34,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:34,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:34,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:34,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:18:34,855 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:34,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:34,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1923349337, now seen corresponding path program 7 times [2024-06-21 16:18:34,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:34,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514272371] [2024-06-21 16:18:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:34,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:35,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:35,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514272371] [2024-06-21 16:18:35,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514272371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:35,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:35,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227864185] [2024-06-21 16:18:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:35,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:35,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:35,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:35,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 531 transitions, 6854 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:35,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:35,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:35,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:37,596 INFO L124 PetriNetUnfolderBase]: 4883/7434 cut-off events. [2024-06-21 16:18:37,596 INFO L125 PetriNetUnfolderBase]: For 2262754/2262754 co-relation queries the response was YES. [2024-06-21 16:18:37,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84486 conditions, 7434 events. 4883/7434 cut-off events. For 2262754/2262754 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42395 event pairs, 1092 based on Foata normal form. 1/7434 useless extension candidates. Maximal degree in co-relation 84290. Up to 7364 conditions per place. [2024-06-21 16:18:37,719 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 514 selfloop transitions, 38 changer transitions 0/555 dead transitions. [2024-06-21 16:18:37,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 555 transitions, 8343 flow [2024-06-21 16:18:37,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:18:37,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 16:18:37,720 INFO L175 Difference]: Start difference. First operand has 415 places, 531 transitions, 6854 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:18:37,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 555 transitions, 8343 flow [2024-06-21 16:18:42,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 555 transitions, 8067 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-21 16:18:42,753 INFO L231 Difference]: Finished difference. Result has 415 places, 534 transitions, 6735 flow [2024-06-21 16:18:42,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6735, PETRI_PLACES=415, PETRI_TRANSITIONS=534} [2024-06-21 16:18:42,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 16:18:42,754 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 534 transitions, 6735 flow [2024-06-21 16:18:42,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:42,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:42,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:42,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:18:42,754 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:42,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash -182080607, now seen corresponding path program 7 times [2024-06-21 16:18:42,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:42,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902431374] [2024-06-21 16:18:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:42,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:18:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902431374] [2024-06-21 16:18:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902431374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:43,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757511981] [2024-06-21 16:18:43,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:43,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:43,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:43,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 534 transitions, 6735 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:43,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:43,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:43,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:45,475 INFO L124 PetriNetUnfolderBase]: 4880/7430 cut-off events. [2024-06-21 16:18:45,476 INFO L125 PetriNetUnfolderBase]: For 2285372/2285372 co-relation queries the response was YES. [2024-06-21 16:18:45,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84375 conditions, 7430 events. 4880/7430 cut-off events. For 2285372/2285372 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42339 event pairs, 1087 based on Foata normal form. 1/7430 useless extension candidates. Maximal degree in co-relation 84179. Up to 7322 conditions per place. [2024-06-21 16:18:45,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 493 selfloop transitions, 56 changer transitions 0/552 dead transitions. [2024-06-21 16:18:45,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 552 transitions, 8137 flow [2024-06-21 16:18:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:18:45,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:18:45,609 INFO L175 Difference]: Start difference. First operand has 415 places, 534 transitions, 6735 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:18:45,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 552 transitions, 8137 flow [2024-06-21 16:18:51,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 552 transitions, 7885 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 16:18:51,203 INFO L231 Difference]: Finished difference. Result has 416 places, 534 transitions, 6601 flow [2024-06-21 16:18:51,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6483, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6601, PETRI_PLACES=416, PETRI_TRANSITIONS=534} [2024-06-21 16:18:51,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 16:18:51,203 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 534 transitions, 6601 flow [2024-06-21 16:18:51,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:51,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:18:51,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:18:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:18:51,203 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:18:51,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:18:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1923021047, now seen corresponding path program 8 times [2024-06-21 16:18:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:18:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688211960] [2024-06-21 16:18:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:18:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:18:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:18:51,970 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 16:18:51,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:18:51,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688211960] [2024-06-21 16:18:51,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688211960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:18:51,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:18:51,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:18:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998154044] [2024-06-21 16:18:51,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:18:51,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:18:51,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:18:51,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:18:51,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:18:52,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:18:52,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 534 transitions, 6601 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:18:52,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:18:52,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:18:52,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:18:53,939 INFO L124 PetriNetUnfolderBase]: 4877/7426 cut-off events. [2024-06-21 16:18:53,939 INFO L125 PetriNetUnfolderBase]: For 2307582/2307582 co-relation queries the response was YES. [2024-06-21 16:18:54,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84171 conditions, 7426 events. 4877/7426 cut-off events. For 2307582/2307582 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42287 event pairs, 1089 based on Foata normal form. 1/7426 useless extension candidates. Maximal degree in co-relation 83975. Up to 7357 conditions per place. [2024-06-21 16:18:54,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 36 changer transitions 0/552 dead transitions. [2024-06-21 16:18:54,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 552 transitions, 8005 flow [2024-06-21 16:18:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:18:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:18:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:18:54,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-21 16:18:54,064 INFO L175 Difference]: Start difference. First operand has 416 places, 534 transitions, 6601 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:18:54,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 552 transitions, 8005 flow [2024-06-21 16:19:00,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 552 transitions, 7851 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:00,189 INFO L231 Difference]: Finished difference. Result has 418 places, 534 transitions, 6525 flow [2024-06-21 16:19:00,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6525, PETRI_PLACES=418, PETRI_TRANSITIONS=534} [2024-06-21 16:19:00,189 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 16:19:00,189 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 534 transitions, 6525 flow [2024-06-21 16:19:00,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:00,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:00,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:00,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:19:00,190 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:00,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1923020644, now seen corresponding path program 4 times [2024-06-21 16:19:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:00,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487196878] [2024-06-21 16:19:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:00,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:00,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487196878] [2024-06-21 16:19:00,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487196878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:00,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:00,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:00,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132925260] [2024-06-21 16:19:00,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:00,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:00,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:00,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:00,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:01,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:01,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 534 transitions, 6525 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:01,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:01,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:01,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:02,937 INFO L124 PetriNetUnfolderBase]: 4868/7414 cut-off events. [2024-06-21 16:19:02,937 INFO L125 PetriNetUnfolderBase]: For 2331169/2331169 co-relation queries the response was YES. [2024-06-21 16:19:03,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83867 conditions, 7414 events. 4868/7414 cut-off events. For 2331169/2331169 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42302 event pairs, 1088 based on Foata normal form. 3/7416 useless extension candidates. Maximal degree in co-relation 83670. Up to 7323 conditions per place. [2024-06-21 16:19:03,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 515 selfloop transitions, 38 changer transitions 0/556 dead transitions. [2024-06-21 16:19:03,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 556 transitions, 7959 flow [2024-06-21 16:19:03,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:19:03,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 16:19:03,064 INFO L175 Difference]: Start difference. First operand has 418 places, 534 transitions, 6525 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:19:03,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 556 transitions, 7959 flow [2024-06-21 16:19:08,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 556 transitions, 7842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:08,300 INFO L231 Difference]: Finished difference. Result has 420 places, 534 transitions, 6490 flow [2024-06-21 16:19:08,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6490, PETRI_PLACES=420, PETRI_TRANSITIONS=534} [2024-06-21 16:19:08,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-21 16:19:08,301 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 534 transitions, 6490 flow [2024-06-21 16:19:08,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:08,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:08,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:08,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:19:08,301 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:08,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:08,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1291099262, now seen corresponding path program 5 times [2024-06-21 16:19:08,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:08,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891677561] [2024-06-21 16:19:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:08,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:08,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:08,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891677561] [2024-06-21 16:19:08,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891677561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:08,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:08,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:08,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876048882] [2024-06-21 16:19:08,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:08,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:08,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:08,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:08,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:09,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:09,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 534 transitions, 6490 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:09,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:09,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:09,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:11,019 INFO L124 PetriNetUnfolderBase]: 4883/7435 cut-off events. [2024-06-21 16:19:11,019 INFO L125 PetriNetUnfolderBase]: For 2364848/2364848 co-relation queries the response was YES. [2024-06-21 16:19:11,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84295 conditions, 7435 events. 4883/7435 cut-off events. For 2364848/2364848 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42400 event pairs, 1085 based on Foata normal form. 3/7437 useless extension candidates. Maximal degree in co-relation 84097. Up to 7384 conditions per place. [2024-06-21 16:19:11,142 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 523 selfloop transitions, 28 changer transitions 0/554 dead transitions. [2024-06-21 16:19:11,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 554 transitions, 7720 flow [2024-06-21 16:19:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:19:11,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-21 16:19:11,143 INFO L175 Difference]: Start difference. First operand has 420 places, 534 transitions, 6490 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:19:11,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 554 transitions, 7720 flow [2024-06-21 16:19:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 554 transitions, 7566 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:19:16,821 INFO L231 Difference]: Finished difference. Result has 421 places, 538 transitions, 6488 flow [2024-06-21 16:19:16,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6354, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6488, PETRI_PLACES=421, PETRI_TRANSITIONS=538} [2024-06-21 16:19:16,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 16:19:16,822 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 538 transitions, 6488 flow [2024-06-21 16:19:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:16,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:16,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:19:16,822 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:16,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:16,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1290653389, now seen corresponding path program 9 times [2024-06-21 16:19:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:16,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485196903] [2024-06-21 16:19:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:17,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:17,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485196903] [2024-06-21 16:19:17,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485196903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:17,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:17,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078388503] [2024-06-21 16:19:17,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:17,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:17,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:17,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:17,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 538 transitions, 6488 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:17,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:17,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:17,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:19,633 INFO L124 PetriNetUnfolderBase]: 4888/7442 cut-off events. [2024-06-21 16:19:19,634 INFO L125 PetriNetUnfolderBase]: For 2379128/2379128 co-relation queries the response was YES. [2024-06-21 16:19:19,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84463 conditions, 7442 events. 4888/7442 cut-off events. For 2379128/2379128 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42461 event pairs, 1084 based on Foata normal form. 1/7442 useless extension candidates. Maximal degree in co-relation 84266. Up to 7406 conditions per place. [2024-06-21 16:19:19,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 22 changer transitions 0/555 dead transitions. [2024-06-21 16:19:19,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 555 transitions, 7696 flow [2024-06-21 16:19:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:19:19,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 16:19:19,759 INFO L175 Difference]: Start difference. First operand has 421 places, 538 transitions, 6488 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:19:19,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 555 transitions, 7696 flow [2024-06-21 16:19:24,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 555 transitions, 7598 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:19:24,767 INFO L231 Difference]: Finished difference. Result has 424 places, 541 transitions, 6516 flow [2024-06-21 16:19:24,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6516, PETRI_PLACES=424, PETRI_TRANSITIONS=541} [2024-06-21 16:19:24,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-21 16:19:24,768 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 541 transitions, 6516 flow [2024-06-21 16:19:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:24,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:24,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:24,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:19:24,769 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:24,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:24,769 INFO L85 PathProgramCache]: Analyzing trace with hash 749396008, now seen corresponding path program 6 times [2024-06-21 16:19:24,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:24,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416467120] [2024-06-21 16:19:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:24,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:25,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:25,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416467120] [2024-06-21 16:19:25,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416467120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:25,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:25,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:25,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674996704] [2024-06-21 16:19:25,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:25,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:25,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:25,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:25,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:25,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 541 transitions, 6516 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:25,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:25,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:25,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:27,508 INFO L124 PetriNetUnfolderBase]: 4903/7463 cut-off events. [2024-06-21 16:19:27,508 INFO L125 PetriNetUnfolderBase]: For 2430678/2430678 co-relation queries the response was YES. [2024-06-21 16:19:27,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84784 conditions, 7463 events. 4903/7463 cut-off events. For 2430678/2430678 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 42588 event pairs, 1083 based on Foata normal form. 3/7465 useless extension candidates. Maximal degree in co-relation 84586. Up to 7400 conditions per place. [2024-06-21 16:19:27,630 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 526 selfloop transitions, 33 changer transitions 0/562 dead transitions. [2024-06-21 16:19:27,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 562 transitions, 7755 flow [2024-06-21 16:19:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:27,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:19:27,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 16:19:27,631 INFO L175 Difference]: Start difference. First operand has 424 places, 541 transitions, 6516 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:19:27,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 562 transitions, 7755 flow [2024-06-21 16:19:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 562 transitions, 7663 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:33,708 INFO L231 Difference]: Finished difference. Result has 426 places, 544 transitions, 6569 flow [2024-06-21 16:19:33,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=426, PETRI_TRANSITIONS=544} [2024-06-21 16:19:33,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 16:19:33,709 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 544 transitions, 6569 flow [2024-06-21 16:19:33,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:33,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:33,709 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 16:19:33,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:19:33,709 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:33,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:33,709 INFO L85 PathProgramCache]: Analyzing trace with hash 749632941, now seen corresponding path program 8 times [2024-06-21 16:19:33,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:33,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72952198] [2024-06-21 16:19:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:33,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72952198] [2024-06-21 16:19:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72952198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:34,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:34,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:34,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195892540] [2024-06-21 16:19:34,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:34,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:34,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:34,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:34,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 544 transitions, 6569 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:34,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:34,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:34,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:36,434 INFO L124 PetriNetUnfolderBase]: 4908/7470 cut-off events. [2024-06-21 16:19:36,434 INFO L125 PetriNetUnfolderBase]: For 2445674/2445674 co-relation queries the response was YES. [2024-06-21 16:19:36,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85103 conditions, 7470 events. 4908/7470 cut-off events. For 2445674/2445674 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 42665 event pairs, 1082 based on Foata normal form. 1/7470 useless extension candidates. Maximal degree in co-relation 84904. Up to 7419 conditions per place. [2024-06-21 16:19:36,557 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 529 selfloop transitions, 29 changer transitions 0/561 dead transitions. [2024-06-21 16:19:36,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 561 transitions, 7763 flow [2024-06-21 16:19:36,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:19:36,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-21 16:19:36,558 INFO L175 Difference]: Start difference. First operand has 426 places, 544 transitions, 6569 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:19:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 561 transitions, 7763 flow [2024-06-21 16:19:42,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 561 transitions, 7649 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:42,221 INFO L231 Difference]: Finished difference. Result has 428 places, 547 transitions, 6569 flow [2024-06-21 16:19:42,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6455, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=428, PETRI_TRANSITIONS=547} [2024-06-21 16:19:42,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 16:19:42,222 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 547 transitions, 6569 flow [2024-06-21 16:19:42,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:42,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:42,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:42,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:19:42,222 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:42,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash 749395791, now seen corresponding path program 9 times [2024-06-21 16:19:42,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:42,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427843746] [2024-06-21 16:19:42,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:42,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:42,937 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 16:19:42,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427843746] [2024-06-21 16:19:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427843746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:42,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:42,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:19:42,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627050508] [2024-06-21 16:19:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:42,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:19:42,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:19:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:19:43,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:19:43,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 547 transitions, 6569 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:43,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:43,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:19:43,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:44,987 INFO L124 PetriNetUnfolderBase]: 4913/7477 cut-off events. [2024-06-21 16:19:44,987 INFO L125 PetriNetUnfolderBase]: For 2478690/2478690 co-relation queries the response was YES. [2024-06-21 16:19:45,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85245 conditions, 7477 events. 4913/7477 cut-off events. For 2478690/2478690 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 42671 event pairs, 1082 based on Foata normal form. 1/7477 useless extension candidates. Maximal degree in co-relation 85045. Up to 7417 conditions per place. [2024-06-21 16:19:45,111 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 524 selfloop transitions, 37 changer transitions 0/564 dead transitions. [2024-06-21 16:19:45,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 564 transitions, 7763 flow [2024-06-21 16:19:45,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:19:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:19:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:19:45,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-21 16:19:45,112 INFO L175 Difference]: Start difference. First operand has 428 places, 547 transitions, 6569 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:19:45,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 564 transitions, 7763 flow [2024-06-21 16:19:53,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 564 transitions, 7683 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:19:53,170 INFO L231 Difference]: Finished difference. Result has 430 places, 550 transitions, 6613 flow [2024-06-21 16:19:53,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6613, PETRI_PLACES=430, PETRI_TRANSITIONS=550} [2024-06-21 16:19:53,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 16:19:53,171 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 550 transitions, 6613 flow [2024-06-21 16:19:53,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:53,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:19:53,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:19:53,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:19:53,171 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:19:53,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:19:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1170869052, now seen corresponding path program 3 times [2024-06-21 16:19:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:19:53,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249885939] [2024-06-21 16:19:53,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:19:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:19:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:19:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:19:54,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:19:54,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249885939] [2024-06-21 16:19:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249885939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:19:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:19:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:19:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361478612] [2024-06-21 16:19:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:19:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:19:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:19:55,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:19:55,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:19:55,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:19:55,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 550 transitions, 6613 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:19:55,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:19:55,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:19:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:19:57,351 INFO L124 PetriNetUnfolderBase]: 4849/7443 cut-off events. [2024-06-21 16:19:57,351 INFO L125 PetriNetUnfolderBase]: For 2589789/2589789 co-relation queries the response was YES. [2024-06-21 16:19:57,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85913 conditions, 7443 events. 4849/7443 cut-off events. For 2589789/2589789 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43120 event pairs, 1025 based on Foata normal form. 12/7454 useless extension candidates. Maximal degree in co-relation 85712. Up to 6824 conditions per place. [2024-06-21 16:19:57,481 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 479 selfloop transitions, 56 changer transitions 0/593 dead transitions. [2024-06-21 16:19:57,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 593 transitions, 7917 flow [2024-06-21 16:19:57,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:19:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:19:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-21 16:19:57,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-21 16:19:57,483 INFO L175 Difference]: Start difference. First operand has 430 places, 550 transitions, 6613 flow. Second operand 11 states and 199 transitions. [2024-06-21 16:19:57,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 593 transitions, 7917 flow [2024-06-21 16:20:05,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 593 transitions, 7827 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:20:05,848 INFO L231 Difference]: Finished difference. Result has 435 places, 551 transitions, 6739 flow [2024-06-21 16:20:05,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6523, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6739, PETRI_PLACES=435, PETRI_TRANSITIONS=551} [2024-06-21 16:20:05,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-21 16:20:05,849 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 551 transitions, 6739 flow [2024-06-21 16:20:05,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:05,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:05,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:05,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:20:05,850 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:05,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1432178432, now seen corresponding path program 4 times [2024-06-21 16:20:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:05,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053145792] [2024-06-21 16:20:05,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:05,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:07,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053145792] [2024-06-21 16:20:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053145792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314070654] [2024-06-21 16:20:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:07,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:07,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 551 transitions, 6739 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:07,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:07,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:07,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:10,037 INFO L124 PetriNetUnfolderBase]: 4891/7515 cut-off events. [2024-06-21 16:20:10,037 INFO L125 PetriNetUnfolderBase]: For 2635434/2635434 co-relation queries the response was YES. [2024-06-21 16:20:10,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87183 conditions, 7515 events. 4891/7515 cut-off events. For 2635434/2635434 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43749 event pairs, 1055 based on Foata normal form. 12/7526 useless extension candidates. Maximal degree in co-relation 86981. Up to 7064 conditions per place. [2024-06-21 16:20:10,159 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 501 selfloop transitions, 35 changer transitions 0/594 dead transitions. [2024-06-21 16:20:10,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 594 transitions, 8032 flow [2024-06-21 16:20:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 16:20:10,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:20:10,160 INFO L175 Difference]: Start difference. First operand has 435 places, 551 transitions, 6739 flow. Second operand 11 states and 196 transitions. [2024-06-21 16:20:10,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 594 transitions, 8032 flow [2024-06-21 16:20:17,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 594 transitions, 7848 flow, removed 37 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:17,704 INFO L231 Difference]: Finished difference. Result has 437 places, 552 transitions, 6714 flow [2024-06-21 16:20:17,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6555, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6714, PETRI_PLACES=437, PETRI_TRANSITIONS=552} [2024-06-21 16:20:17,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 16:20:17,704 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 552 transitions, 6714 flow [2024-06-21 16:20:17,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:17,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:17,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:17,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:20:17,705 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:17,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1914328494, now seen corresponding path program 5 times [2024-06-21 16:20:17,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:17,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355115053] [2024-06-21 16:20:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:19,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355115053] [2024-06-21 16:20:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355115053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:19,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:19,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:19,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859881662] [2024-06-21 16:20:19,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:19,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:19,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:19,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:19,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 552 transitions, 6714 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:19,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:19,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:19,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:21,659 INFO L124 PetriNetUnfolderBase]: 4932/7586 cut-off events. [2024-06-21 16:20:21,659 INFO L125 PetriNetUnfolderBase]: For 2670073/2670073 co-relation queries the response was YES. [2024-06-21 16:20:21,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87731 conditions, 7586 events. 4932/7586 cut-off events. For 2670073/2670073 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44295 event pairs, 1070 based on Foata normal form. 12/7597 useless extension candidates. Maximal degree in co-relation 87528. Up to 7212 conditions per place. [2024-06-21 16:20:21,789 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 513 selfloop transitions, 23 changer transitions 0/594 dead transitions. [2024-06-21 16:20:21,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 594 transitions, 8005 flow [2024-06-21 16:20:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-21 16:20:21,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-21 16:20:21,790 INFO L175 Difference]: Start difference. First operand has 437 places, 552 transitions, 6714 flow. Second operand 11 states and 191 transitions. [2024-06-21 16:20:21,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 594 transitions, 8005 flow [2024-06-21 16:20:27,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 594 transitions, 7881 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:27,058 INFO L231 Difference]: Finished difference. Result has 439 places, 553 transitions, 6727 flow [2024-06-21 16:20:27,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6727, PETRI_PLACES=439, PETRI_TRANSITIONS=553} [2024-06-21 16:20:27,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 16:20:27,059 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 553 transitions, 6727 flow [2024-06-21 16:20:27,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:27,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:27,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:20:27,059 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:27,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1914587964, now seen corresponding path program 6 times [2024-06-21 16:20:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:27,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151728257] [2024-06-21 16:20:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:27,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:28,757 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 16:20:28,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:28,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151728257] [2024-06-21 16:20:28,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151728257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:28,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:28,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:28,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831116587] [2024-06-21 16:20:28,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:28,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:28,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:28,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:28,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:28,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 553 transitions, 6727 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:28,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:28,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:28,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:31,186 INFO L124 PetriNetUnfolderBase]: 4973/7657 cut-off events. [2024-06-21 16:20:31,186 INFO L125 PetriNetUnfolderBase]: For 2713719/2713719 co-relation queries the response was YES. [2024-06-21 16:20:31,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88524 conditions, 7657 events. 4973/7657 cut-off events. For 2713719/2713719 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44960 event pairs, 1080 based on Foata normal form. 12/7668 useless extension candidates. Maximal degree in co-relation 88320. Up to 7242 conditions per place. [2024-06-21 16:20:31,313 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 511 selfloop transitions, 26 changer transitions 0/595 dead transitions. [2024-06-21 16:20:31,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 595 transitions, 8033 flow [2024-06-21 16:20:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:31,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 16:20:31,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 16:20:31,314 INFO L175 Difference]: Start difference. First operand has 439 places, 553 transitions, 6727 flow. Second operand 11 states and 192 transitions. [2024-06-21 16:20:31,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 595 transitions, 8033 flow [2024-06-21 16:20:38,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 595 transitions, 7931 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:38,182 INFO L231 Difference]: Finished difference. Result has 441 places, 554 transitions, 6783 flow [2024-06-21 16:20:38,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6625, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6783, PETRI_PLACES=441, PETRI_TRANSITIONS=554} [2024-06-21 16:20:38,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 16:20:38,183 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 554 transitions, 6783 flow [2024-06-21 16:20:38,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:38,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:38,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:20:38,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:20:38,183 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:38,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash 838876116, now seen corresponding path program 7 times [2024-06-21 16:20:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:38,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990716465] [2024-06-21 16:20:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:38,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990716465] [2024-06-21 16:20:40,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990716465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:40,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:40,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:20:40,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110245905] [2024-06-21 16:20:40,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:40,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:20:40,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:20:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:20:40,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:40,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 554 transitions, 6783 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:40,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:40,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:40,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:42,891 INFO L124 PetriNetUnfolderBase]: 5027/7750 cut-off events. [2024-06-21 16:20:42,891 INFO L125 PetriNetUnfolderBase]: For 2815339/2815344 co-relation queries the response was YES. [2024-06-21 16:20:42,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90225 conditions, 7750 events. 5027/7750 cut-off events. For 2815339/2815344 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 45612 event pairs, 1882 based on Foata normal form. 12/7736 useless extension candidates. Maximal degree in co-relation 90020. Up to 7359 conditions per place. [2024-06-21 16:20:43,008 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 514 selfloop transitions, 25 changer transitions 0/597 dead transitions. [2024-06-21 16:20:43,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 597 transitions, 8123 flow [2024-06-21 16:20:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 16:20:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 16:20:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2024-06-21 16:20:43,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 16:20:43,009 INFO L175 Difference]: Start difference. First operand has 441 places, 554 transitions, 6783 flow. Second operand 12 states and 200 transitions. [2024-06-21 16:20:43,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 597 transitions, 8123 flow [2024-06-21 16:20:52,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 597 transitions, 7995 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 16:20:52,082 INFO L231 Difference]: Finished difference. Result has 445 places, 557 transitions, 6850 flow [2024-06-21 16:20:52,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6657, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6850, PETRI_PLACES=445, PETRI_TRANSITIONS=557} [2024-06-21 16:20:52,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-21 16:20:52,083 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 557 transitions, 6850 flow [2024-06-21 16:20:52,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:52,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:20:52,084 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 16:20:52,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:20:52,084 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:20:52,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:20:52,084 INFO L85 PathProgramCache]: Analyzing trace with hash 358317258, now seen corresponding path program 1 times [2024-06-21 16:20:52,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:20:52,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007029039] [2024-06-21 16:20:52,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:20:52,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:20:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:20:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:20:53,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:20:53,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007029039] [2024-06-21 16:20:53,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007029039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:20:53,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:20:53,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:20:53,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825684056] [2024-06-21 16:20:53,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:20:53,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:20:53,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:20:53,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:20:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:20:53,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:20:53,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 557 transitions, 6850 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:20:53,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:20:53,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:20:53,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:20:55,969 INFO L124 PetriNetUnfolderBase]: 5006/7735 cut-off events. [2024-06-21 16:20:55,969 INFO L125 PetriNetUnfolderBase]: For 2721383/2721391 co-relation queries the response was YES. [2024-06-21 16:20:56,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89083 conditions, 7735 events. 5006/7735 cut-off events. For 2721383/2721391 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 45778 event pairs, 1145 based on Foata normal form. 8/7717 useless extension candidates. Maximal degree in co-relation 88876. Up to 7382 conditions per place. [2024-06-21 16:20:56,091 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 498 selfloop transitions, 66 changer transitions 0/617 dead transitions. [2024-06-21 16:20:56,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 617 transitions, 8364 flow [2024-06-21 16:20:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:20:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:20:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 16:20:56,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:20:56,092 INFO L175 Difference]: Start difference. First operand has 445 places, 557 transitions, 6850 flow. Second operand 11 states and 196 transitions. [2024-06-21 16:20:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 617 transitions, 8364 flow [2024-06-21 16:21:04,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 617 transitions, 8240 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:04,464 INFO L231 Difference]: Finished difference. Result has 451 places, 582 transitions, 7202 flow [2024-06-21 16:21:04,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7202, PETRI_PLACES=451, PETRI_TRANSITIONS=582} [2024-06-21 16:21:04,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-21 16:21:04,465 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 582 transitions, 7202 flow [2024-06-21 16:21:04,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:04,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:04,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:04,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:21:04,465 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:04,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 230733726, now seen corresponding path program 8 times [2024-06-21 16:21:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:04,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216375513] [2024-06-21 16:21:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:04,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:06,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:06,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216375513] [2024-06-21 16:21:06,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216375513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:06,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261705818] [2024-06-21 16:21:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:06,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:06,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:06,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:06,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:21:06,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 582 transitions, 7202 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:06,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:06,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:21:06,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:09,182 INFO L124 PetriNetUnfolderBase]: 5128/7909 cut-off events. [2024-06-21 16:21:09,182 INFO L125 PetriNetUnfolderBase]: For 2879490/2879495 co-relation queries the response was YES. [2024-06-21 16:21:09,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92176 conditions, 7909 events. 5128/7909 cut-off events. For 2879490/2879495 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46837 event pairs, 1911 based on Foata normal form. 12/7886 useless extension candidates. Maximal degree in co-relation 91964. Up to 7389 conditions per place. [2024-06-21 16:21:09,303 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 524 selfloop transitions, 41 changer transitions 0/624 dead transitions. [2024-06-21 16:21:09,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 624 transitions, 8586 flow [2024-06-21 16:21:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:09,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-21 16:21:09,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:21:09,305 INFO L175 Difference]: Start difference. First operand has 451 places, 582 transitions, 7202 flow. Second operand 11 states and 196 transitions. [2024-06-21 16:21:09,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 624 transitions, 8586 flow [2024-06-21 16:21:16,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 624 transitions, 8442 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:21:16,192 INFO L231 Difference]: Finished difference. Result has 457 places, 583 transitions, 7250 flow [2024-06-21 16:21:16,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7058, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7250, PETRI_PLACES=457, PETRI_TRANSITIONS=583} [2024-06-21 16:21:16,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-21 16:21:16,193 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 583 transitions, 7250 flow [2024-06-21 16:21:16,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:16,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:16,193 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 16:21:16,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:21:16,193 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:16,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:16,193 INFO L85 PathProgramCache]: Analyzing trace with hash 821619582, now seen corresponding path program 2 times [2024-06-21 16:21:16,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:16,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755487627] [2024-06-21 16:21:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:16,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755487627] [2024-06-21 16:21:16,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755487627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:16,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:21:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76478027] [2024-06-21 16:21:16,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:16,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:21:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:21:16,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:21:17,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:21:17,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 583 transitions, 7250 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:17,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:17,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:21:17,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:19,838 INFO L124 PetriNetUnfolderBase]: 5106/7896 cut-off events. [2024-06-21 16:21:19,839 INFO L125 PetriNetUnfolderBase]: For 2813891/2813897 co-relation queries the response was YES. [2024-06-21 16:21:20,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91622 conditions, 7896 events. 5106/7896 cut-off events. For 2813891/2813897 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46949 event pairs, 1163 based on Foata normal form. 6/7876 useless extension candidates. Maximal degree in co-relation 91409. Up to 7440 conditions per place. [2024-06-21 16:21:20,137 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 482 selfloop transitions, 100 changer transitions 0/635 dead transitions. [2024-06-21 16:21:20,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 635 transitions, 9334 flow [2024-06-21 16:21:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:21:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:21:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-21 16:21:20,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-21 16:21:20,138 INFO L175 Difference]: Start difference. First operand has 457 places, 583 transitions, 7250 flow. Second operand 10 states and 182 transitions. [2024-06-21 16:21:20,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 635 transitions, 9334 flow [2024-06-21 16:21:28,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 635 transitions, 9174 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:28,428 INFO L231 Difference]: Finished difference. Result has 461 places, 602 transitions, 7613 flow [2024-06-21 16:21:28,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7613, PETRI_PLACES=461, PETRI_TRANSITIONS=602} [2024-06-21 16:21:28,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-21 16:21:28,429 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 602 transitions, 7613 flow [2024-06-21 16:21:28,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:28,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:28,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:28,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:21:28,430 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:28,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash 524917416, now seen corresponding path program 9 times [2024-06-21 16:21:28,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:28,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597649468] [2024-06-21 16:21:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:30,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597649468] [2024-06-21 16:21:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597649468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274977356] [2024-06-21 16:21:30,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:30,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:30,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:30,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:21:30,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 602 transitions, 7613 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:30,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:30,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:21:30,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:33,378 INFO L124 PetriNetUnfolderBase]: 5225/8067 cut-off events. [2024-06-21 16:21:33,378 INFO L125 PetriNetUnfolderBase]: For 3003213/3003220 co-relation queries the response was YES. [2024-06-21 16:21:33,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95095 conditions, 8067 events. 5225/8067 cut-off events. For 3003213/3003220 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 48048 event pairs, 1931 based on Foata normal form. 12/8036 useless extension candidates. Maximal degree in co-relation 94878. Up to 7561 conditions per place. [2024-06-21 16:21:33,511 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 547 selfloop transitions, 35 changer transitions 0/643 dead transitions. [2024-06-21 16:21:33,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 643 transitions, 9047 flow [2024-06-21 16:21:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:21:33,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:21:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 16:21:33,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 16:21:33,512 INFO L175 Difference]: Start difference. First operand has 461 places, 602 transitions, 7613 flow. Second operand 11 states and 192 transitions. [2024-06-21 16:21:33,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 643 transitions, 9047 flow [2024-06-21 16:21:42,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 643 transitions, 8938 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 16:21:42,649 INFO L231 Difference]: Finished difference. Result has 469 places, 603 transitions, 7704 flow [2024-06-21 16:21:42,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7520, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7704, PETRI_PLACES=469, PETRI_TRANSITIONS=603} [2024-06-21 16:21:42,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-21 16:21:42,650 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 603 transitions, 7704 flow [2024-06-21 16:21:42,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:42,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:42,650 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 16:21:42,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:21:42,650 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:42,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash 768274280, now seen corresponding path program 3 times [2024-06-21 16:21:42,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:42,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483123391] [2024-06-21 16:21:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:42,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:43,751 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 16:21:43,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:43,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483123391] [2024-06-21 16:21:43,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483123391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:43,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:43,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:21:43,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765952310] [2024-06-21 16:21:43,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:43,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:21:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:21:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:21:43,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:21:43,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 603 transitions, 7704 flow. Second operand has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:43,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:43,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:21:43,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:21:47,132 INFO L124 PetriNetUnfolderBase]: 5468/8430 cut-off events. [2024-06-21 16:21:47,132 INFO L125 PetriNetUnfolderBase]: For 3063460/3063471 co-relation queries the response was YES. [2024-06-21 16:21:47,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96791 conditions, 8430 events. 5468/8430 cut-off events. For 3063460/3063471 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50564 event pairs, 1464 based on Foata normal form. 25/8425 useless extension candidates. Maximal degree in co-relation 96572. Up to 7860 conditions per place. [2024-06-21 16:21:47,281 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 557 selfloop transitions, 151 changer transitions 0/761 dead transitions. [2024-06-21 16:21:47,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 761 transitions, 10864 flow [2024-06-21 16:21:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:21:47,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:21:47,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2024-06-21 16:21:47,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-21 16:21:47,282 INFO L175 Difference]: Start difference. First operand has 469 places, 603 transitions, 7704 flow. Second operand 13 states and 237 transitions. [2024-06-21 16:21:47,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 761 transitions, 10864 flow [2024-06-21 16:21:56,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 761 transitions, 10718 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-21 16:21:56,838 INFO L231 Difference]: Finished difference. Result has 480 places, 713 transitions, 9649 flow [2024-06-21 16:21:56,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7558, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9649, PETRI_PLACES=480, PETRI_TRANSITIONS=713} [2024-06-21 16:21:56,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-21 16:21:56,839 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 713 transitions, 9649 flow [2024-06-21 16:21:56,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.545454545454545) internal successors, (116), 11 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:56,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:21:56,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:21:56,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:21:56,840 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:21:56,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:21:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1608187450, now seen corresponding path program 10 times [2024-06-21 16:21:56,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:21:56,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764179294] [2024-06-21 16:21:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:21:56,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:21:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:21:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:21:58,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:21:58,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764179294] [2024-06-21 16:21:58,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764179294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:21:58,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:21:58,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:21:58,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480806386] [2024-06-21 16:21:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:21:58,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:21:58,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:21:58,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:21:58,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:21:58,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:21:58,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 713 transitions, 9649 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:21:58,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:21:58,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:21:58,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:01,955 INFO L124 PetriNetUnfolderBase]: 5518/8487 cut-off events. [2024-06-21 16:22:01,955 INFO L125 PetriNetUnfolderBase]: For 2995872/2995879 co-relation queries the response was YES. [2024-06-21 16:22:02,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98284 conditions, 8487 events. 5518/8487 cut-off events. For 2995872/2995879 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 50559 event pairs, 1966 based on Foata normal form. 12/8447 useless extension candidates. Maximal degree in co-relation 98057. Up to 7999 conditions per place. [2024-06-21 16:22:02,100 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 652 selfloop transitions, 37 changer transitions 0/754 dead transitions. [2024-06-21 16:22:02,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 754 transitions, 11197 flow [2024-06-21 16:22:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-21 16:22:02,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-21 16:22:02,101 INFO L175 Difference]: Start difference. First operand has 480 places, 713 transitions, 9649 flow. Second operand 11 states and 195 transitions. [2024-06-21 16:22:02,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 754 transitions, 11197 flow [2024-06-21 16:22:15,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 754 transitions, 11132 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-21 16:22:15,093 INFO L231 Difference]: Finished difference. Result has 489 places, 713 transitions, 9664 flow [2024-06-21 16:22:15,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9664, PETRI_PLACES=489, PETRI_TRANSITIONS=713} [2024-06-21 16:22:15,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-21 16:22:15,094 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 713 transitions, 9664 flow [2024-06-21 16:22:15,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:15,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:15,094 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 16:22:15,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:22:15,095 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:15,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash -894283446, now seen corresponding path program 1 times [2024-06-21 16:22:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:15,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587427900] [2024-06-21 16:22:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:15,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:15,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587427900] [2024-06-21 16:22:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587427900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:15,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260742735] [2024-06-21 16:22:15,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:15,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:16,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:16,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 713 transitions, 9664 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 16:22:16,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:16,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:16,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:19,621 INFO L124 PetriNetUnfolderBase]: 5699/8708 cut-off events. [2024-06-21 16:22:19,621 INFO L125 PetriNetUnfolderBase]: For 2935624/2935628 co-relation queries the response was YES. [2024-06-21 16:22:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99507 conditions, 8708 events. 5699/8708 cut-off events. For 2935624/2935628 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 51469 event pairs, 1585 based on Foata normal form. 7/8714 useless extension candidates. Maximal degree in co-relation 99278. Up to 8419 conditions per place. [2024-06-21 16:22:19,798 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 660 selfloop transitions, 115 changer transitions 0/778 dead transitions. [2024-06-21 16:22:19,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 778 transitions, 12382 flow [2024-06-21 16:22:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 16:22:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 16:22:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 230 transitions. [2024-06-21 16:22:19,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-21 16:22:19,800 INFO L175 Difference]: Start difference. First operand has 489 places, 713 transitions, 9664 flow. Second operand 14 states and 230 transitions. [2024-06-21 16:22:19,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 778 transitions, 12382 flow [2024-06-21 16:22:31,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 778 transitions, 12280 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 16:22:31,468 INFO L231 Difference]: Finished difference. Result has 499 places, 737 transitions, 10319 flow [2024-06-21 16:22:31,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9562, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10319, PETRI_PLACES=499, PETRI_TRANSITIONS=737} [2024-06-21 16:22:31,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-21 16:22:31,469 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 737 transitions, 10319 flow [2024-06-21 16:22:31,469 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 16:22:31,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:31,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:22:31,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:22:31,469 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:31,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:31,469 INFO L85 PathProgramCache]: Analyzing trace with hash 525176886, now seen corresponding path program 11 times [2024-06-21 16:22:31,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:31,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776066327] [2024-06-21 16:22:31,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:31,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:33,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776066327] [2024-06-21 16:22:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776066327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:33,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:33,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 16:22:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932965518] [2024-06-21 16:22:33,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:33,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 16:22:33,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 16:22:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-21 16:22:33,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 16:22:33,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 737 transitions, 10319 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:33,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:33,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 16:22:33,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:36,883 INFO L124 PetriNetUnfolderBase]: 5579/8568 cut-off events. [2024-06-21 16:22:36,883 INFO L125 PetriNetUnfolderBase]: For 3064848/3064857 co-relation queries the response was YES. [2024-06-21 16:22:37,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99881 conditions, 8568 events. 5579/8568 cut-off events. For 3064848/3064857 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 51096 event pairs, 1939 based on Foata normal form. 12/8522 useless extension candidates. Maximal degree in co-relation 99646. Up to 7957 conditions per place. [2024-06-21 16:22:37,042 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 666 selfloop transitions, 41 changer transitions 0/776 dead transitions. [2024-06-21 16:22:37,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 776 transitions, 11757 flow [2024-06-21 16:22:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:22:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:22:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-21 16:22:37,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-21 16:22:37,043 INFO L175 Difference]: Start difference. First operand has 499 places, 737 transitions, 10319 flow. Second operand 11 states and 192 transitions. [2024-06-21 16:22:37,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 776 transitions, 11757 flow [2024-06-21 16:22:48,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 776 transitions, 11525 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-21 16:22:48,112 INFO L231 Difference]: Finished difference. Result has 505 places, 736 transitions, 10019 flow [2024-06-21 16:22:48,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9931, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10019, PETRI_PLACES=505, PETRI_TRANSITIONS=736} [2024-06-21 16:22:48,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-21 16:22:48,112 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 736 transitions, 10019 flow [2024-06-21 16:22:48,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:22:48,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:22:48,112 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 16:22:48,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:22:48,113 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:22:48,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:22:48,113 INFO L85 PathProgramCache]: Analyzing trace with hash -911819526, now seen corresponding path program 2 times [2024-06-21 16:22:48,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:22:48,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829680107] [2024-06-21 16:22:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:22:48,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:22:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:22:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:22:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:22:48,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829680107] [2024-06-21 16:22:48,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829680107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:22:48,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:22:48,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:22:48,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321317284] [2024-06-21 16:22:48,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:22:48,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:22:48,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:22:48,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:22:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:22:48,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:22:48,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 736 transitions, 10019 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 16:22:48,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:22:48,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:22:48,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:22:52,312 INFO L124 PetriNetUnfolderBase]: 5694/8697 cut-off events. [2024-06-21 16:22:52,312 INFO L125 PetriNetUnfolderBase]: For 2853750/2853754 co-relation queries the response was YES. [2024-06-21 16:22:52,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98445 conditions, 8697 events. 5694/8697 cut-off events. For 2853750/2853754 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 51316 event pairs, 1564 based on Foata normal form. 7/8703 useless extension candidates. Maximal degree in co-relation 98209. Up to 8401 conditions per place. [2024-06-21 16:22:52,464 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 663 selfloop transitions, 115 changer transitions 0/781 dead transitions. [2024-06-21 16:22:52,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 781 transitions, 12397 flow [2024-06-21 16:22:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 16:22:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 16:22:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 222 transitions. [2024-06-21 16:22:52,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065934065934066 [2024-06-21 16:22:52,466 INFO L175 Difference]: Start difference. First operand has 505 places, 736 transitions, 10019 flow. Second operand 13 states and 222 transitions. [2024-06-21 16:22:52,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 781 transitions, 12397 flow [2024-06-21 16:23:03,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 781 transitions, 12092 flow, removed 44 selfloop flow, removed 12 redundant places. [2024-06-21 16:23:03,484 INFO L231 Difference]: Finished difference. Result has 506 places, 739 transitions, 10008 flow [2024-06-21 16:23:03,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9718, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10008, PETRI_PLACES=506, PETRI_TRANSITIONS=739} [2024-06-21 16:23:03,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 463 predicate places. [2024-06-21 16:23:03,485 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 739 transitions, 10008 flow [2024-06-21 16:23:03,485 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 16:23:03,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:03,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:03,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:23:03,486 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:03,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2016465154, now seen corresponding path program 7 times [2024-06-21 16:23:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735610580] [2024-06-21 16:23:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:04,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735610580] [2024-06-21 16:23:04,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735610580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:04,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:04,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:04,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564583624] [2024-06-21 16:23:04,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:04,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:04,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:04,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:04,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:04,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:04,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 739 transitions, 10008 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:04,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:04,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:04,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:07,292 INFO L124 PetriNetUnfolderBase]: 5709/8723 cut-off events. [2024-06-21 16:23:07,293 INFO L125 PetriNetUnfolderBase]: For 2842606/2842609 co-relation queries the response was YES. [2024-06-21 16:23:07,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97648 conditions, 8723 events. 5709/8723 cut-off events. For 2842606/2842609 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 51522 event pairs, 2089 based on Foata normal form. 5/8726 useless extension candidates. Maximal degree in co-relation 97414. Up to 8648 conditions per place. [2024-06-21 16:23:07,448 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 722 selfloop transitions, 30 changer transitions 0/755 dead transitions. [2024-06-21 16:23:07,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 755 transitions, 11638 flow [2024-06-21 16:23:07,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:23:07,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-21 16:23:07,449 INFO L175 Difference]: Start difference. First operand has 506 places, 739 transitions, 10008 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:23:07,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 755 transitions, 11638 flow [2024-06-21 16:23:20,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 755 transitions, 11370 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-21 16:23:20,438 INFO L231 Difference]: Finished difference. Result has 505 places, 743 transitions, 9890 flow [2024-06-21 16:23:20,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9746, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9890, PETRI_PLACES=505, PETRI_TRANSITIONS=743} [2024-06-21 16:23:20,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-21 16:23:20,439 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 743 transitions, 9890 flow [2024-06-21 16:23:20,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:20,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:23:20,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:23:20,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:23:20,439 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:23:20,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:23:20,440 INFO L85 PathProgramCache]: Analyzing trace with hash -750594461, now seen corresponding path program 10 times [2024-06-21 16:23:20,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:23:20,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638981491] [2024-06-21 16:23:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:23:20,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:23:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:23:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:23:21,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:23:21,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638981491] [2024-06-21 16:23:21,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638981491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:23:21,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:23:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:23:21,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564594455] [2024-06-21 16:23:21,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:23:21,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:23:21,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:23:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:23:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:23:21,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-21 16:23:21,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 743 transitions, 9890 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:23:21,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:23:21,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-21 16:23:21,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:23:24,240 INFO L124 PetriNetUnfolderBase]: 5706/8720 cut-off events. [2024-06-21 16:23:24,241 INFO L125 PetriNetUnfolderBase]: For 2837771/2837774 co-relation queries the response was YES. [2024-06-21 16:23:24,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96883 conditions, 8720 events. 5706/8720 cut-off events. For 2837771/2837774 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 51502 event pairs, 2091 based on Foata normal form. 3/8720 useless extension candidates. Maximal degree in co-relation 96649. Up to 8644 conditions per place. [2024-06-21 16:23:24,407 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 720 selfloop transitions, 30 changer transitions 0/753 dead transitions. [2024-06-21 16:23:24,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 753 transitions, 11420 flow [2024-06-21 16:23:24,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:23:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:23:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 16:23:24,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-21 16:23:24,408 INFO L175 Difference]: Start difference. First operand has 505 places, 743 transitions, 9890 flow. Second operand 8 states and 123 transitions. [2024-06-21 16:23:24,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 753 transitions, 11420 flow Killed by 15