./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.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/mutex-meet-nonrel/safe002_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe002_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_tso.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-7724a2d-m [2024-06-28 02:22:04,609 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 02:22:04,677 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 02:22:04,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 02:22:04,683 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 02:22:04,707 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 02:22:04,707 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 02:22:04,708 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 02:22:04,708 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 02:22:04,711 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 02:22:04,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 02:22:04,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 02:22:04,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 02:22:04,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 02:22:04,714 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 02:22:04,714 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 02:22:04,714 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 02:22:04,715 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 02:22:04,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 02:22:04,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 02:22:04,716 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 02:22:04,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 02:22:04,717 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 02:22:04,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 02:22:04,717 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 02:22:04,717 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 02:22:04,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 02:22:04,718 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 02:22:04,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 02:22:04,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 02:22:04,719 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 02:22:04,719 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 02:22:04,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:22:04,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 02:22:04,720 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 02:22:04,720 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 02:22:04,720 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 02:22:04,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 02:22:04,721 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 02:22:04,721 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 02:22:04,721 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 02:22:04,721 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 02:22:04,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 02:22:04,722 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 02:22:04,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 02:22:04,977 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 02:22:04,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 02:22:04,981 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 02:22:04,982 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 02:22:04,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_tso.yml/witness.yml [2024-06-28 02:22:05,096 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 02:22:05,096 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 02:22:05,097 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-28 02:22:06,187 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 02:22:06,394 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 02:22:06,394 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_tso.i [2024-06-28 02:22:06,410 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75c508f71/48136e7bba814ebdb6083e58c61c5c69/FLAG0216564a5 [2024-06-28 02:22:06,421 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75c508f71/48136e7bba814ebdb6083e58c61c5c69 [2024-06-28 02:22:06,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 02:22:06,422 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 02:22:06,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 02:22:06,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 02:22:06,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 02:22:06,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:22:05" (1/2) ... [2024-06-28 02:22:06,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128ff1db and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:22:06, skipping insertion in model container [2024-06-28 02:22:06,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:22:05" (1/2) ... [2024-06-28 02:22:06,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2999c920 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 02:22:06, skipping insertion in model container [2024-06-28 02:22:06,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:22:06" (2/2) ... [2024-06-28 02:22:06,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128ff1db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06, skipping insertion in model container [2024-06-28 02:22:06,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 02:22:06" (2/2) ... [2024-06-28 02:22:06,431 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 02:22:06,474 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 02:22:06,475 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 02:22:06,476 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 02:22:06,476 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((0 <= __unbuffered_cnt && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-28 02:22:06,476 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 02:22:06,477 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-28 02:22:06,514 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 02:22:06,754 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:22:06,762 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 02:22:06,905 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 02:22:06,945 INFO L206 MainTranslator]: Completed translation [2024-06-28 02:22:06,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06 WrapperNode [2024-06-28 02:22:06,945 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 02:22:06,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 02:22:06,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 02:22:06,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 02:22:06,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:06,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,003 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-28 02:22:07,004 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 02:22:07,005 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 02:22:07,005 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 02:22:07,005 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 02:22:07,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,047 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]. [2024-06-28 02:22:07,048 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,048 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,066 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 02:22:07,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 02:22:07,079 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 02:22:07,079 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 02:22:07,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (1/1) ... [2024-06-28 02:22:07,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 02:22:07,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 02:22:07,110 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) [2024-06-28 02:22:07,118 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 [2024-06-28 02:22:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 02:22:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 02:22:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 02:22:07,147 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 02:22:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 02:22:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 02:22:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 02:22:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 02:22:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 02:22:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 02:22:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 02:22:07,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 02:22:07,151 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 02:22:07,269 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 02:22:07,272 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 02:22:07,448 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 02:22:07,448 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 02:22:07,511 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 02:22:07,512 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 02:22:07,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:22:07 BoogieIcfgContainer [2024-06-28 02:22:07,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 02:22:07,513 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 02:22:07,513 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 02:22:07,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 02:22:07,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 02:22:05" (1/4) ... [2024-06-28 02:22:07,516 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44615c1f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 02:22:07, skipping insertion in model container [2024-06-28 02:22:07,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 02:22:06" (2/4) ... [2024-06-28 02:22:07,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44615c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:22:07, skipping insertion in model container [2024-06-28 02:22:07,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 02:22:06" (3/4) ... [2024-06-28 02:22:07,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44615c1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 02:22:07, skipping insertion in model container [2024-06-28 02:22:07,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 02:22:07" (4/4) ... [2024-06-28 02:22:07,518 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_tso.i [2024-06-28 02:22:07,531 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 02:22:07,531 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 02:22:07,532 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 02:22:07,573 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 02:22:07,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 02:22:07,636 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 02:22:07,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:22:07,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 02:22:07,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 02:22:07,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 02:22:07,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 02:22:07,656 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;@54a8ec82, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 02:22:07,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 02:22:07,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 02:22:07,661 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 02:22:07,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 02:22:07,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:07,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 02:22:07,662 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)] === [2024-06-28 02:22:07,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash 219930474, now seen corresponding path program 1 times [2024-06-28 02:22:07,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:07,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242573336] [2024-06-28 02:22:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:07,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:07,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:08,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:08,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242573336] [2024-06-28 02:22:08,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242573336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:08,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:08,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 02:22:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808749225] [2024-06-28 02:22:08,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:08,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 02:22:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:08,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 02:22:08,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 02:22:08,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-28 02:22:08,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:08,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:08,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-28 02:22:08,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:08,300 INFO L124 PetriNetUnfolderBase]: 430/713 cut-off events. [2024-06-28 02:22:08,300 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-06-28 02:22:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1436 conditions, 713 events. 430/713 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3407 event pairs, 273 based on Foata normal form. 1/675 useless extension candidates. Maximal degree in co-relation 1424. Up to 672 conditions per place. [2024-06-28 02:22:08,311 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-28 02:22:08,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-28 02:22:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 02:22:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 02:22:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-28 02:22:08,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-28 02:22:08,323 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-28 02:22:08,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-28 02:22:08,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:08,327 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 02:22:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 02:22:08,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 02:22:08,332 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 02:22:08,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:08,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:08,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:08,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 02:22:08,333 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)] === [2024-06-28 02:22:08,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1029876338, now seen corresponding path program 1 times [2024-06-28 02:22:08,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:08,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526935689] [2024-06-28 02:22:08,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:08,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:08,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:08,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526935689] [2024-06-28 02:22:08,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526935689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:08,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:08,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400201254] [2024-06-28 02:22:08,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:08,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:08,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:08,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:08,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:08,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:08,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:08,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:08,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:08,791 INFO L124 PetriNetUnfolderBase]: 755/1225 cut-off events. [2024-06-28 02:22:08,791 INFO L125 PetriNetUnfolderBase]: For 226/240 co-relation queries the response was YES. [2024-06-28 02:22:08,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2818 conditions, 1225 events. 755/1225 cut-off events. For 226/240 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5975 event pairs, 367 based on Foata normal form. 13/1205 useless extension candidates. Maximal degree in co-relation 2806. Up to 1093 conditions per place. [2024-06-28 02:22:08,798 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-28 02:22:08,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 218 flow [2024-06-28 02:22:08,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:08,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:08,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-28 02:22:08,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:22:08,802 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 104 transitions. [2024-06-28 02:22:08,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 218 flow [2024-06-28 02:22:08,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:08,806 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-28 02:22:08,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-28 02:22:08,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-28 02:22:08,807 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-28 02:22:08,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:08,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:08,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 02:22:08,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:08,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:08,811 INFO L85 PathProgramCache]: Analyzing trace with hash 933975979, now seen corresponding path program 1 times [2024-06-28 02:22:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365197386] [2024-06-28 02:22:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:08,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:08,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365197386] [2024-06-28 02:22:08,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365197386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:08,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:08,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 02:22:08,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575457149] [2024-06-28 02:22:08,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:08,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 02:22:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 02:22:08,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-28 02:22:08,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-28 02:22:08,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2024-06-28 02:22:08,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:08,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-28 02:22:08,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:09,038 INFO L124 PetriNetUnfolderBase]: 583/983 cut-off events. [2024-06-28 02:22:09,038 INFO L125 PetriNetUnfolderBase]: For 496/499 co-relation queries the response was YES. [2024-06-28 02:22:09,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2451 conditions, 983 events. 583/983 cut-off events. For 496/499 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4829 event pairs, 249 based on Foata normal form. 4/984 useless extension candidates. Maximal degree in co-relation 2437. Up to 889 conditions per place. [2024-06-28 02:22:09,044 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-28 02:22:09,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 259 flow [2024-06-28 02:22:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:09,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-28 02:22:09,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-28 02:22:09,046 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 104 transitions. [2024-06-28 02:22:09,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 259 flow [2024-06-28 02:22:09,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 242 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 02:22:09,048 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 164 flow [2024-06-28 02:22:09,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-28 02:22:09,049 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-28 02:22:09,049 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 164 flow [2024-06-28 02:22:09,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 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) [2024-06-28 02:22:09,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:09,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 02:22:09,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:09,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1111514431, now seen corresponding path program 1 times [2024-06-28 02:22:09,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:09,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154510248] [2024-06-28 02:22:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:09,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:09,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:09,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154510248] [2024-06-28 02:22:09,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154510248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:09,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:09,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:09,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407141977] [2024-06-28 02:22:09,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:09,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:09,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:09,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:09,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:09,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:09,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:09,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:09,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:09,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:09,328 INFO L124 PetriNetUnfolderBase]: 890/1463 cut-off events. [2024-06-28 02:22:09,329 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-28 02:22:09,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1463 events. 890/1463 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7226 event pairs, 354 based on Foata normal form. 2/1463 useless extension candidates. Maximal degree in co-relation 3932. Up to 1332 conditions per place. [2024-06-28 02:22:09,336 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-28 02:22:09,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 345 flow [2024-06-28 02:22:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-28 02:22:09,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-28 02:22:09,338 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 164 flow. Second operand 5 states and 119 transitions. [2024-06-28 02:22:09,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 345 flow [2024-06-28 02:22:09,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 341 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:09,341 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 233 flow [2024-06-28 02:22:09,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-06-28 02:22:09,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-06-28 02:22:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 233 flow [2024-06-28 02:22:09,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:09,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:09,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:09,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 02:22:09,343 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)] === [2024-06-28 02:22:09,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:09,343 INFO L85 PathProgramCache]: Analyzing trace with hash 187187522, now seen corresponding path program 1 times [2024-06-28 02:22:09,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:09,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429108830] [2024-06-28 02:22:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:09,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:09,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:09,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429108830] [2024-06-28 02:22:09,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429108830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:09,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:09,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:09,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993260762] [2024-06-28 02:22:09,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:09,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:09,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:09,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:09,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:09,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:09,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 233 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:09,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:09,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:09,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:09,648 INFO L124 PetriNetUnfolderBase]: 885/1465 cut-off events. [2024-06-28 02:22:09,648 INFO L125 PetriNetUnfolderBase]: For 1967/2000 co-relation queries the response was YES. [2024-06-28 02:22:09,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4476 conditions, 1465 events. 885/1465 cut-off events. For 1967/2000 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7379 event pairs, 300 based on Foata normal form. 15/1463 useless extension candidates. Maximal degree in co-relation 4455. Up to 1265 conditions per place. [2024-06-28 02:22:09,657 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 14 changer transitions 0/66 dead transitions. [2024-06-28 02:22:09,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 66 transitions, 395 flow [2024-06-28 02:22:09,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:09,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-28 02:22:09,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-06-28 02:22:09,658 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 233 flow. Second operand 4 states and 105 transitions. [2024-06-28 02:22:09,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 66 transitions, 395 flow [2024-06-28 02:22:09,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 395 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:09,661 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 297 flow [2024-06-28 02:22:09,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=297, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-28 02:22:09,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-28 02:22:09,662 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 297 flow [2024-06-28 02:22:09,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:09,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:09,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:09,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 02:22:09,663 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)] === [2024-06-28 02:22:09,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:09,663 INFO L85 PathProgramCache]: Analyzing trace with hash -934672516, now seen corresponding path program 2 times [2024-06-28 02:22:09,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:09,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756138966] [2024-06-28 02:22:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:09,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756138966] [2024-06-28 02:22:09,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756138966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:09,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:09,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:09,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798859533] [2024-06-28 02:22:09,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:09,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:09,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:09,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:09,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:09,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:09,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:09,931 INFO L124 PetriNetUnfolderBase]: 877/1456 cut-off events. [2024-06-28 02:22:09,931 INFO L125 PetriNetUnfolderBase]: For 3045/3091 co-relation queries the response was YES. [2024-06-28 02:22:09,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4930 conditions, 1456 events. 877/1456 cut-off events. For 3045/3091 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7346 event pairs, 300 based on Foata normal form. 20/1459 useless extension candidates. Maximal degree in co-relation 4906. Up to 1242 conditions per place. [2024-06-28 02:22:09,939 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 45 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-28 02:22:09,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 489 flow [2024-06-28 02:22:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:09,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-28 02:22:09,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-28 02:22:09,941 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 297 flow. Second operand 5 states and 127 transitions. [2024-06-28 02:22:09,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 489 flow [2024-06-28 02:22:09,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 453 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-28 02:22:09,945 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 331 flow [2024-06-28 02:22:09,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=331, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-28 02:22:09,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-06-28 02:22:09,946 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 331 flow [2024-06-28 02:22:09,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:09,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:09,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:09,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 02:22:09,947 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)] === [2024-06-28 02:22:09,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash -934672330, now seen corresponding path program 1 times [2024-06-28 02:22:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:09,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591303626] [2024-06-28 02:22:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:09,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:10,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:10,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591303626] [2024-06-28 02:22:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591303626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:10,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115967554] [2024-06-28 02:22:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:10,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:10,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 331 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-28 02:22:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:10,263 INFO L124 PetriNetUnfolderBase]: 965/1584 cut-off events. [2024-06-28 02:22:10,263 INFO L125 PetriNetUnfolderBase]: For 3011/3013 co-relation queries the response was YES. [2024-06-28 02:22:10,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5280 conditions, 1584 events. 965/1584 cut-off events. For 3011/3013 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8060 event pairs, 282 based on Foata normal form. 8/1589 useless extension candidates. Maximal degree in co-relation 5255. Up to 1336 conditions per place. [2024-06-28 02:22:10,273 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 60 selfloop transitions, 27 changer transitions 0/94 dead transitions. [2024-06-28 02:22:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 651 flow [2024-06-28 02:22:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:22:10,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-28 02:22:10,274 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 331 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:22:10,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 651 flow [2024-06-28 02:22:10,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 94 transitions, 609 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:10,280 INFO L231 Difference]: Finished difference. Result has 66 places, 71 transitions, 456 flow [2024-06-28 02:22:10,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=456, PETRI_PLACES=66, PETRI_TRANSITIONS=71} [2024-06-28 02:22:10,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-28 02:22:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 71 transitions, 456 flow [2024-06-28 02:22:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-28 02:22:10,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:10,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:10,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 02:22:10,282 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)] === [2024-06-28 02:22:10,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2137423252, now seen corresponding path program 2 times [2024-06-28 02:22:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:10,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896355903] [2024-06-28 02:22:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:10,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:10,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:10,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896355903] [2024-06-28 02:22:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896355903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:10,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:10,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956836723] [2024-06-28 02:22:10,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:10,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:10,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:10,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:10,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 71 transitions, 456 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-28 02:22:10,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:10,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:10,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:10,640 INFO L124 PetriNetUnfolderBase]: 960/1588 cut-off events. [2024-06-28 02:22:10,640 INFO L125 PetriNetUnfolderBase]: For 4726/4728 co-relation queries the response was YES. [2024-06-28 02:22:10,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6188 conditions, 1588 events. 960/1588 cut-off events. For 4726/4728 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8060 event pairs, 328 based on Foata normal form. 4/1589 useless extension candidates. Maximal degree in co-relation 6160. Up to 1384 conditions per place. [2024-06-28 02:22:10,652 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/101 dead transitions. [2024-06-28 02:22:10,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 780 flow [2024-06-28 02:22:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:10,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:22:10,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-28 02:22:10,654 INFO L175 Difference]: Start difference. First operand has 66 places, 71 transitions, 456 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:22:10,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 780 flow [2024-06-28 02:22:10,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 730 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:10,668 INFO L231 Difference]: Finished difference. Result has 72 places, 82 transitions, 581 flow [2024-06-28 02:22:10,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=581, PETRI_PLACES=72, PETRI_TRANSITIONS=82} [2024-06-28 02:22:10,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-28 02:22:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 82 transitions, 581 flow [2024-06-28 02:22:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-28 02:22:10,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:10,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 02:22:10,671 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)] === [2024-06-28 02:22:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1281530880, now seen corresponding path program 1 times [2024-06-28 02:22:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:10,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145867507] [2024-06-28 02:22:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:10,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:10,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145867507] [2024-06-28 02:22:10,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145867507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:10,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:10,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:10,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964987742] [2024-06-28 02:22:10,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:10,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:10,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:10,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:10,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 82 transitions, 581 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-28 02:22:10,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:10,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:10,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:10,979 INFO L124 PetriNetUnfolderBase]: 952/1574 cut-off events. [2024-06-28 02:22:10,979 INFO L125 PetriNetUnfolderBase]: For 5734/5734 co-relation queries the response was YES. [2024-06-28 02:22:11,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6457 conditions, 1574 events. 952/1574 cut-off events. For 5734/5734 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7971 event pairs, 305 based on Foata normal form. 4/1576 useless extension candidates. Maximal degree in co-relation 6425. Up to 1401 conditions per place. [2024-06-28 02:22:11,027 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 85 selfloop transitions, 12 changer transitions 0/104 dead transitions. [2024-06-28 02:22:11,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 104 transitions, 843 flow [2024-06-28 02:22:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-28 02:22:11,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 02:22:11,030 INFO L175 Difference]: Start difference. First operand has 72 places, 82 transitions, 581 flow. Second operand 6 states and 140 transitions. [2024-06-28 02:22:11,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 104 transitions, 843 flow [2024-06-28 02:22:11,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 104 transitions, 825 flow, removed 9 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:11,042 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 616 flow [2024-06-28 02:22:11,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=616, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-06-28 02:22:11,043 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-28 02:22:11,043 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 616 flow [2024-06-28 02:22:11,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-28 02:22:11,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:11,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 02:22:11,044 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)] === [2024-06-28 02:22:11,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1626430724, now seen corresponding path program 1 times [2024-06-28 02:22:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:11,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792014697] [2024-06-28 02:22:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:11,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792014697] [2024-06-28 02:22:11,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792014697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:11,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:11,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830450532] [2024-06-28 02:22:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:11,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:11,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 616 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:11,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:11,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:11,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:11,411 INFO L124 PetriNetUnfolderBase]: 1092/1787 cut-off events. [2024-06-28 02:22:11,411 INFO L125 PetriNetUnfolderBase]: For 7493/7497 co-relation queries the response was YES. [2024-06-28 02:22:11,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1787 events. 1092/1787 cut-off events. For 7493/7497 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9185 event pairs, 278 based on Foata normal form. 5/1787 useless extension candidates. Maximal degree in co-relation 7659. Up to 1459 conditions per place. [2024-06-28 02:22:11,430 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 51 changer transitions 0/140 dead transitions. [2024-06-28 02:22:11,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 140 transitions, 1264 flow [2024-06-28 02:22:11,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-28 02:22:11,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-28 02:22:11,431 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 616 flow. Second operand 6 states and 153 transitions. [2024-06-28 02:22:11,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 140 transitions, 1264 flow [2024-06-28 02:22:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 140 transitions, 1229 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:11,450 INFO L231 Difference]: Finished difference. Result has 82 places, 118 transitions, 1074 flow [2024-06-28 02:22:11,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1074, PETRI_PLACES=82, PETRI_TRANSITIONS=118} [2024-06-28 02:22:11,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-28 02:22:11,451 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 118 transitions, 1074 flow [2024-06-28 02:22:11,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:11,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:11,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 02:22:11,452 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)] === [2024-06-28 02:22:11,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1089929948, now seen corresponding path program 2 times [2024-06-28 02:22:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:11,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545899400] [2024-06-28 02:22:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:11,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:11,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545899400] [2024-06-28 02:22:11,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545899400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:11,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:11,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866682876] [2024-06-28 02:22:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:11,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:11,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:11,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 118 transitions, 1074 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:11,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:11,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:11,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:11,814 INFO L124 PetriNetUnfolderBase]: 1163/1911 cut-off events. [2024-06-28 02:22:11,814 INFO L125 PetriNetUnfolderBase]: For 11177/11181 co-relation queries the response was YES. [2024-06-28 02:22:11,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 1911 events. 1163/1911 cut-off events. For 11177/11181 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9972 event pairs, 276 based on Foata normal form. 5/1911 useless extension candidates. Maximal degree in co-relation 9363. Up to 1402 conditions per place. [2024-06-28 02:22:11,829 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 76 selfloop transitions, 78 changer transitions 0/161 dead transitions. [2024-06-28 02:22:11,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 161 transitions, 1714 flow [2024-06-28 02:22:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 02:22:11,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-28 02:22:11,831 INFO L175 Difference]: Start difference. First operand has 82 places, 118 transitions, 1074 flow. Second operand 8 states and 197 transitions. [2024-06-28 02:22:11,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 161 transitions, 1714 flow [2024-06-28 02:22:11,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 161 transitions, 1684 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:11,862 INFO L231 Difference]: Finished difference. Result has 91 places, 132 transitions, 1438 flow [2024-06-28 02:22:11,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1438, PETRI_PLACES=91, PETRI_TRANSITIONS=132} [2024-06-28 02:22:11,862 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-28 02:22:11,863 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 132 transitions, 1438 flow [2024-06-28 02:22:11,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:11,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:11,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 02:22:11,863 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)] === [2024-06-28 02:22:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1089924368, now seen corresponding path program 3 times [2024-06-28 02:22:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026387872] [2024-06-28 02:22:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:11,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:11,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026387872] [2024-06-28 02:22:11,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026387872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:11,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:11,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003136104] [2024-06-28 02:22:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:11,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:11,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:12,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:12,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 132 transitions, 1438 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:12,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:12,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:12,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:12,253 INFO L124 PetriNetUnfolderBase]: 1186/1953 cut-off events. [2024-06-28 02:22:12,254 INFO L125 PetriNetUnfolderBase]: For 14976/14980 co-relation queries the response was YES. [2024-06-28 02:22:12,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10833 conditions, 1953 events. 1186/1953 cut-off events. For 14976/14980 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10290 event pairs, 278 based on Foata normal form. 5/1953 useless extension candidates. Maximal degree in co-relation 10791. Up to 1425 conditions per place. [2024-06-28 02:22:12,268 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 85 selfloop transitions, 83 changer transitions 0/175 dead transitions. [2024-06-28 02:22:12,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 175 transitions, 2076 flow [2024-06-28 02:22:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:22:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:22:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-28 02:22:12,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-28 02:22:12,270 INFO L175 Difference]: Start difference. First operand has 91 places, 132 transitions, 1438 flow. Second operand 9 states and 222 transitions. [2024-06-28 02:22:12,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 175 transitions, 2076 flow [2024-06-28 02:22:12,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 175 transitions, 1990 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:12,304 INFO L231 Difference]: Finished difference. Result has 98 places, 140 transitions, 1651 flow [2024-06-28 02:22:12,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1352, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1651, PETRI_PLACES=98, PETRI_TRANSITIONS=140} [2024-06-28 02:22:12,305 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-28 02:22:12,305 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 140 transitions, 1651 flow [2024-06-28 02:22:12,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:12,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:12,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:12,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 02:22:12,306 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)] === [2024-06-28 02:22:12,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:12,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1835612478, now seen corresponding path program 4 times [2024-06-28 02:22:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:12,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149436898] [2024-06-28 02:22:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:12,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:12,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:12,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149436898] [2024-06-28 02:22:12,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149436898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:12,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:12,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:12,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388858795] [2024-06-28 02:22:12,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:12,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:12,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:12,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:12,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:12,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:12,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 140 transitions, 1651 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:12,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:12,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:12,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:12,642 INFO L124 PetriNetUnfolderBase]: 1181/1961 cut-off events. [2024-06-28 02:22:12,642 INFO L125 PetriNetUnfolderBase]: For 16094/16098 co-relation queries the response was YES. [2024-06-28 02:22:12,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11070 conditions, 1961 events. 1181/1961 cut-off events. For 16094/16098 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10295 event pairs, 315 based on Foata normal form. 3/1959 useless extension candidates. Maximal degree in co-relation 11025. Up to 1602 conditions per place. [2024-06-28 02:22:12,656 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 42 changer transitions 0/180 dead transitions. [2024-06-28 02:22:12,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 180 transitions, 2263 flow [2024-06-28 02:22:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-28 02:22:12,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-28 02:22:12,657 INFO L175 Difference]: Start difference. First operand has 98 places, 140 transitions, 1651 flow. Second operand 7 states and 167 transitions. [2024-06-28 02:22:12,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 180 transitions, 2263 flow [2024-06-28 02:22:12,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 180 transitions, 2081 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-28 02:22:12,690 INFO L231 Difference]: Finished difference. Result has 103 places, 157 transitions, 1843 flow [2024-06-28 02:22:12,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1843, PETRI_PLACES=103, PETRI_TRANSITIONS=157} [2024-06-28 02:22:12,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 62 predicate places. [2024-06-28 02:22:12,691 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 157 transitions, 1843 flow [2024-06-28 02:22:12,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:12,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:12,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 02:22:12,692 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:12,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:12,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2003529296, now seen corresponding path program 1 times [2024-06-28 02:22:12,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:12,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523208669] [2024-06-28 02:22:12,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:12,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:12,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:12,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523208669] [2024-06-28 02:22:12,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523208669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:12,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:12,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 02:22:12,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893643694] [2024-06-28 02:22:12,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:12,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 02:22:12,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:12,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 02:22:12,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 02:22:12,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:12,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 157 transitions, 1843 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-06-28 02:22:12,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:12,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:12,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:13,026 INFO L124 PetriNetUnfolderBase]: 1115/1865 cut-off events. [2024-06-28 02:22:13,026 INFO L125 PetriNetUnfolderBase]: For 17546/17551 co-relation queries the response was YES. [2024-06-28 02:22:13,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10789 conditions, 1865 events. 1115/1865 cut-off events. For 17546/17551 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9936 event pairs, 306 based on Foata normal form. 8/1867 useless extension candidates. Maximal degree in co-relation 10740. Up to 1554 conditions per place. [2024-06-28 02:22:13,042 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 128 selfloop transitions, 16 changer transitions 0/166 dead transitions. [2024-06-28 02:22:13,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 166 transitions, 2165 flow [2024-06-28 02:22:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 02:22:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 02:22:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-28 02:22:13,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 02:22:13,043 INFO L175 Difference]: Start difference. First operand has 103 places, 157 transitions, 1843 flow. Second operand 4 states and 100 transitions. [2024-06-28 02:22:13,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 166 transitions, 2165 flow [2024-06-28 02:22:13,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 166 transitions, 2087 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-28 02:22:13,083 INFO L231 Difference]: Finished difference. Result has 106 places, 157 transitions, 1807 flow [2024-06-28 02:22:13,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1807, PETRI_PLACES=106, PETRI_TRANSITIONS=157} [2024-06-28 02:22:13,084 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-28 02:22:13,084 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 157 transitions, 1807 flow [2024-06-28 02:22:13,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 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) [2024-06-28 02:22:13,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:13,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:13,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 02:22:13,085 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:13,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:13,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1546136027, now seen corresponding path program 1 times [2024-06-28 02:22:13,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:13,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413276565] [2024-06-28 02:22:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:13,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:13,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:13,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413276565] [2024-06-28 02:22:13,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413276565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:13,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:13,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101730660] [2024-06-28 02:22:13,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:13,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:13,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:13,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:13,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 157 transitions, 1807 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-28 02:22:13,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:13,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:13,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:13,502 INFO L124 PetriNetUnfolderBase]: 1177/1946 cut-off events. [2024-06-28 02:22:13,502 INFO L125 PetriNetUnfolderBase]: For 20993/21065 co-relation queries the response was YES. [2024-06-28 02:22:13,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11468 conditions, 1946 events. 1177/1946 cut-off events. For 20993/21065 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10326 event pairs, 185 based on Foata normal form. 13/1909 useless extension candidates. Maximal degree in co-relation 11416. Up to 1537 conditions per place. [2024-06-28 02:22:13,519 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 128 selfloop transitions, 33 changer transitions 0/186 dead transitions. [2024-06-28 02:22:13,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 186 transitions, 2319 flow [2024-06-28 02:22:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-28 02:22:13,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-28 02:22:13,521 INFO L175 Difference]: Start difference. First operand has 106 places, 157 transitions, 1807 flow. Second operand 6 states and 152 transitions. [2024-06-28 02:22:13,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 186 transitions, 2319 flow [2024-06-28 02:22:13,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 2287 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:13,562 INFO L231 Difference]: Finished difference. Result has 109 places, 161 transitions, 1908 flow [2024-06-28 02:22:13,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1908, PETRI_PLACES=109, PETRI_TRANSITIONS=161} [2024-06-28 02:22:13,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-28 02:22:13,563 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 161 transitions, 1908 flow [2024-06-28 02:22:13,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-28 02:22:13,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:13,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 02:22:13,564 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)] === [2024-06-28 02:22:13,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:13,564 INFO L85 PathProgramCache]: Analyzing trace with hash 172091409, now seen corresponding path program 2 times [2024-06-28 02:22:13,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:13,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984497070] [2024-06-28 02:22:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:13,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:13,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984497070] [2024-06-28 02:22:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984497070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109642701] [2024-06-28 02:22:13,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:13,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:13,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:13,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 161 transitions, 1908 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-28 02:22:13,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:13,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:13,979 INFO L124 PetriNetUnfolderBase]: 1164/1931 cut-off events. [2024-06-28 02:22:13,979 INFO L125 PetriNetUnfolderBase]: For 23057/23136 co-relation queries the response was YES. [2024-06-28 02:22:13,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11675 conditions, 1931 events. 1164/1931 cut-off events. For 23057/23136 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10223 event pairs, 252 based on Foata normal form. 11/1891 useless extension candidates. Maximal degree in co-relation 11622. Up to 1585 conditions per place. [2024-06-28 02:22:13,993 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 125 selfloop transitions, 29 changer transitions 0/179 dead transitions. [2024-06-28 02:22:13,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 179 transitions, 2284 flow [2024-06-28 02:22:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:13,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-28 02:22:13,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-28 02:22:13,995 INFO L175 Difference]: Start difference. First operand has 109 places, 161 transitions, 1908 flow. Second operand 5 states and 127 transitions. [2024-06-28 02:22:13,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 179 transitions, 2284 flow [2024-06-28 02:22:14,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 179 transitions, 2218 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-28 02:22:14,041 INFO L231 Difference]: Finished difference. Result has 112 places, 161 transitions, 1909 flow [2024-06-28 02:22:14,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1909, PETRI_PLACES=112, PETRI_TRANSITIONS=161} [2024-06-28 02:22:14,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-28 02:22:14,042 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 161 transitions, 1909 flow [2024-06-28 02:22:14,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-28 02:22:14,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:14,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 02:22:14,043 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)] === [2024-06-28 02:22:14,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash -572086597, now seen corresponding path program 3 times [2024-06-28 02:22:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700163709] [2024-06-28 02:22:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:14,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:14,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700163709] [2024-06-28 02:22:14,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700163709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:14,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:14,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:14,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785838883] [2024-06-28 02:22:14,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:14,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:14,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:14,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:14,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:14,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:14,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 161 transitions, 1909 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-28 02:22:14,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:14,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:14,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:14,403 INFO L124 PetriNetUnfolderBase]: 1151/1912 cut-off events. [2024-06-28 02:22:14,403 INFO L125 PetriNetUnfolderBase]: For 23943/24010 co-relation queries the response was YES. [2024-06-28 02:22:14,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11593 conditions, 1912 events. 1151/1912 cut-off events. For 23943/24010 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10137 event pairs, 247 based on Foata normal form. 7/1869 useless extension candidates. Maximal degree in co-relation 11538. Up to 1552 conditions per place. [2024-06-28 02:22:14,418 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 126 selfloop transitions, 34 changer transitions 0/185 dead transitions. [2024-06-28 02:22:14,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 185 transitions, 2339 flow [2024-06-28 02:22:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:14,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-28 02:22:14,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-28 02:22:14,419 INFO L175 Difference]: Start difference. First operand has 112 places, 161 transitions, 1909 flow. Second operand 6 states and 149 transitions. [2024-06-28 02:22:14,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 185 transitions, 2339 flow [2024-06-28 02:22:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 2275 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:14,468 INFO L231 Difference]: Finished difference. Result has 114 places, 163 transitions, 1957 flow [2024-06-28 02:22:14,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1845, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1957, PETRI_PLACES=114, PETRI_TRANSITIONS=163} [2024-06-28 02:22:14,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-28 02:22:14,469 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 163 transitions, 1957 flow [2024-06-28 02:22:14,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 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) [2024-06-28 02:22:14,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:14,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:14,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 02:22:14,469 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)] === [2024-06-28 02:22:14,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:14,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1427803199, now seen corresponding path program 1 times [2024-06-28 02:22:14,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:14,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921964648] [2024-06-28 02:22:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:14,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:14,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:14,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921964648] [2024-06-28 02:22:14,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921964648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:14,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:14,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:14,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948227518] [2024-06-28 02:22:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:14,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:14,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:14,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:14,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:14,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 163 transitions, 1957 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:14,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:14,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:14,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:14,922 INFO L124 PetriNetUnfolderBase]: 1318/2170 cut-off events. [2024-06-28 02:22:14,922 INFO L125 PetriNetUnfolderBase]: For 28300/28307 co-relation queries the response was YES. [2024-06-28 02:22:14,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12908 conditions, 2170 events. 1318/2170 cut-off events. For 28300/28307 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11548 event pairs, 261 based on Foata normal form. 30/2197 useless extension candidates. Maximal degree in co-relation 12852. Up to 1659 conditions per place. [2024-06-28 02:22:14,939 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 56 changer transitions 0/195 dead transitions. [2024-06-28 02:22:14,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 195 transitions, 2527 flow [2024-06-28 02:22:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:22:14,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:22:14,941 INFO L175 Difference]: Start difference. First operand has 114 places, 163 transitions, 1957 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:22:14,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 195 transitions, 2527 flow [2024-06-28 02:22:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 195 transitions, 2441 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:14,991 INFO L231 Difference]: Finished difference. Result has 118 places, 167 transitions, 2066 flow [2024-06-28 02:22:14,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2066, PETRI_PLACES=118, PETRI_TRANSITIONS=167} [2024-06-28 02:22:14,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-28 02:22:14,992 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 167 transitions, 2066 flow [2024-06-28 02:22:14,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:14,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:14,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:14,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 02:22:14,993 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)] === [2024-06-28 02:22:14,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1069420051, now seen corresponding path program 2 times [2024-06-28 02:22:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:14,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666410261] [2024-06-28 02:22:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:14,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:15,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:15,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666410261] [2024-06-28 02:22:15,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666410261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:15,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:15,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:15,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583867576] [2024-06-28 02:22:15,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:15,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:15,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:15,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:15,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:15,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:15,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 167 transitions, 2066 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:15,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:15,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:15,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:15,427 INFO L124 PetriNetUnfolderBase]: 1335/2193 cut-off events. [2024-06-28 02:22:15,428 INFO L125 PetriNetUnfolderBase]: For 28568/28575 co-relation queries the response was YES. [2024-06-28 02:22:15,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13576 conditions, 2193 events. 1335/2193 cut-off events. For 28568/28575 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11639 event pairs, 291 based on Foata normal form. 10/2200 useless extension candidates. Maximal degree in co-relation 13519. Up to 1912 conditions per place. [2024-06-28 02:22:15,449 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 158 selfloop transitions, 28 changer transitions 0/193 dead transitions. [2024-06-28 02:22:15,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 193 transitions, 2526 flow [2024-06-28 02:22:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 02:22:15,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-28 02:22:15,450 INFO L175 Difference]: Start difference. First operand has 118 places, 167 transitions, 2066 flow. Second operand 7 states and 164 transitions. [2024-06-28 02:22:15,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 193 transitions, 2526 flow [2024-06-28 02:22:15,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 2387 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 02:22:15,512 INFO L231 Difference]: Finished difference. Result has 119 places, 169 transitions, 2022 flow [2024-06-28 02:22:15,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2022, PETRI_PLACES=119, PETRI_TRANSITIONS=169} [2024-06-28 02:22:15,513 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-28 02:22:15,513 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 169 transitions, 2022 flow [2024-06-28 02:22:15,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:15,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:15,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:15,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 02:22:15,514 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)] === [2024-06-28 02:22:15,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1077990931, now seen corresponding path program 3 times [2024-06-28 02:22:15,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:15,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508249230] [2024-06-28 02:22:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:15,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:15,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:15,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508249230] [2024-06-28 02:22:15,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508249230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:15,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:15,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435690228] [2024-06-28 02:22:15,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:15,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:15,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:15,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 169 transitions, 2022 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:15,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:15,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:15,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:15,910 INFO L124 PetriNetUnfolderBase]: 1327/2185 cut-off events. [2024-06-28 02:22:15,910 INFO L125 PetriNetUnfolderBase]: For 29128/29135 co-relation queries the response was YES. [2024-06-28 02:22:15,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13288 conditions, 2185 events. 1327/2185 cut-off events. For 29128/29135 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11612 event pairs, 260 based on Foata normal form. 10/2192 useless extension candidates. Maximal degree in co-relation 13230. Up to 1836 conditions per place. [2024-06-28 02:22:15,928 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 157 selfloop transitions, 33 changer transitions 0/197 dead transitions. [2024-06-28 02:22:15,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2504 flow [2024-06-28 02:22:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:15,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:22:15,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 02:22:15,929 INFO L175 Difference]: Start difference. First operand has 119 places, 169 transitions, 2022 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:22:15,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2504 flow [2024-06-28 02:22:15,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 197 transitions, 2427 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:22:15,986 INFO L231 Difference]: Finished difference. Result has 122 places, 172 transitions, 2074 flow [2024-06-28 02:22:15,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2074, PETRI_PLACES=122, PETRI_TRANSITIONS=172} [2024-06-28 02:22:15,987 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-28 02:22:15,987 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 172 transitions, 2074 flow [2024-06-28 02:22:15,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:15,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:15,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:15,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 02:22:15,988 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)] === [2024-06-28 02:22:15,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:15,988 INFO L85 PathProgramCache]: Analyzing trace with hash -685575289, now seen corresponding path program 1 times [2024-06-28 02:22:15,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:15,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515309346] [2024-06-28 02:22:15,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:15,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:16,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515309346] [2024-06-28 02:22:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515309346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:16,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:16,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:16,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731660695] [2024-06-28 02:22:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:16,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:16,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 172 transitions, 2074 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:16,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:16,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:16,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:16,657 INFO L124 PetriNetUnfolderBase]: 2300/3837 cut-off events. [2024-06-28 02:22:16,657 INFO L125 PetriNetUnfolderBase]: For 69604/69608 co-relation queries the response was YES. [2024-06-28 02:22:16,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 3837 events. 2300/3837 cut-off events. For 69604/69608 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23557 event pairs, 355 based on Foata normal form. 55/3887 useless extension candidates. Maximal degree in co-relation 22649. Up to 1837 conditions per place. [2024-06-28 02:22:16,694 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-28 02:22:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 246 transitions, 3243 flow [2024-06-28 02:22:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-28 02:22:16,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.678125 [2024-06-28 02:22:16,697 INFO L175 Difference]: Start difference. First operand has 122 places, 172 transitions, 2074 flow. Second operand 8 states and 217 transitions. [2024-06-28 02:22:16,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 246 transitions, 3243 flow [2024-06-28 02:22:16,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 246 transitions, 3152 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:16,859 INFO L231 Difference]: Finished difference. Result has 128 places, 191 transitions, 2464 flow [2024-06-28 02:22:16,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2464, PETRI_PLACES=128, PETRI_TRANSITIONS=191} [2024-06-28 02:22:16,859 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-28 02:22:16,859 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 191 transitions, 2464 flow [2024-06-28 02:22:16,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:16,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:16,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 02:22:16,861 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)] === [2024-06-28 02:22:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -767542705, now seen corresponding path program 2 times [2024-06-28 02:22:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029513615] [2024-06-28 02:22:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:16,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:16,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:16,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029513615] [2024-06-28 02:22:16,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029513615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:16,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:16,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:16,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884072143] [2024-06-28 02:22:16,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:16,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:16,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:17,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:17,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 191 transitions, 2464 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:17,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:17,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:17,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:17,651 INFO L124 PetriNetUnfolderBase]: 2449/4118 cut-off events. [2024-06-28 02:22:17,652 INFO L125 PetriNetUnfolderBase]: For 78434/78438 co-relation queries the response was YES. [2024-06-28 02:22:17,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25017 conditions, 4118 events. 2449/4118 cut-off events. For 78434/78438 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 25818 event pairs, 706 based on Foata normal form. 51/4162 useless extension candidates. Maximal degree in co-relation 24954. Up to 3206 conditions per place. [2024-06-28 02:22:17,683 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 150 selfloop transitions, 66 changer transitions 0/223 dead transitions. [2024-06-28 02:22:17,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 3103 flow [2024-06-28 02:22:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-28 02:22:17,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-28 02:22:17,685 INFO L175 Difference]: Start difference. First operand has 128 places, 191 transitions, 2464 flow. Second operand 7 states and 180 transitions. [2024-06-28 02:22:17,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 3103 flow [2024-06-28 02:22:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 223 transitions, 2936 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:17,894 INFO L231 Difference]: Finished difference. Result has 132 places, 194 transitions, 2514 flow [2024-06-28 02:22:17,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2514, PETRI_PLACES=132, PETRI_TRANSITIONS=194} [2024-06-28 02:22:17,894 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-28 02:22:17,895 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 194 transitions, 2514 flow [2024-06-28 02:22:17,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:17,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:17,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:17,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 02:22:17,895 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)] === [2024-06-28 02:22:17,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1039867675, now seen corresponding path program 3 times [2024-06-28 02:22:17,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:17,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232029056] [2024-06-28 02:22:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:17,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:18,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:18,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232029056] [2024-06-28 02:22:18,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232029056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:18,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:18,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:18,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737688643] [2024-06-28 02:22:18,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:18,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:18,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:18,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:18,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:18,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:18,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 194 transitions, 2514 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:18,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:18,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:18,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:18,782 INFO L124 PetriNetUnfolderBase]: 2560/4329 cut-off events. [2024-06-28 02:22:18,782 INFO L125 PetriNetUnfolderBase]: For 80929/80933 co-relation queries the response was YES. [2024-06-28 02:22:18,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25401 conditions, 4329 events. 2560/4329 cut-off events. For 80929/80933 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27716 event pairs, 642 based on Foata normal form. 55/4379 useless extension candidates. Maximal degree in co-relation 25336. Up to 2608 conditions per place. [2024-06-28 02:22:18,815 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 169 selfloop transitions, 64 changer transitions 0/240 dead transitions. [2024-06-28 02:22:18,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 240 transitions, 3378 flow [2024-06-28 02:22:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-28 02:22:18,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-28 02:22:18,816 INFO L175 Difference]: Start difference. First operand has 132 places, 194 transitions, 2514 flow. Second operand 7 states and 185 transitions. [2024-06-28 02:22:18,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 240 transitions, 3378 flow [2024-06-28 02:22:18,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 240 transitions, 3270 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:18,942 INFO L231 Difference]: Finished difference. Result has 136 places, 203 transitions, 2742 flow [2024-06-28 02:22:18,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=136, PETRI_TRANSITIONS=203} [2024-06-28 02:22:18,943 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-28 02:22:18,943 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 203 transitions, 2742 flow [2024-06-28 02:22:18,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:18,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:18,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:18,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 02:22:18,944 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)] === [2024-06-28 02:22:18,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:18,944 INFO L85 PathProgramCache]: Analyzing trace with hash -554666161, now seen corresponding path program 4 times [2024-06-28 02:22:18,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:18,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716751708] [2024-06-28 02:22:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:18,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:19,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716751708] [2024-06-28 02:22:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716751708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:19,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:19,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:19,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26960243] [2024-06-28 02:22:19,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:19,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:19,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:19,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:19,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 203 transitions, 2742 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:19,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:19,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:19,764 INFO L124 PetriNetUnfolderBase]: 2747/4658 cut-off events. [2024-06-28 02:22:19,764 INFO L125 PetriNetUnfolderBase]: For 90599/90603 co-relation queries the response was YES. [2024-06-28 02:22:19,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27492 conditions, 4658 events. 2747/4658 cut-off events. For 90599/90603 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30383 event pairs, 899 based on Foata normal form. 51/4704 useless extension candidates. Maximal degree in co-relation 27425. Up to 3698 conditions per place. [2024-06-28 02:22:19,802 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 97 changer transitions 0/246 dead transitions. [2024-06-28 02:22:19,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 246 transitions, 3500 flow [2024-06-28 02:22:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:22:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:22:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-28 02:22:19,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175 [2024-06-28 02:22:19,804 INFO L175 Difference]: Start difference. First operand has 136 places, 203 transitions, 2742 flow. Second operand 10 states and 247 transitions. [2024-06-28 02:22:19,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 246 transitions, 3500 flow [2024-06-28 02:22:19,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 246 transitions, 3377 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:19,975 INFO L231 Difference]: Finished difference. Result has 143 places, 205 transitions, 2882 flow [2024-06-28 02:22:19,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2882, PETRI_PLACES=143, PETRI_TRANSITIONS=205} [2024-06-28 02:22:19,975 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-28 02:22:19,976 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 205 transitions, 2882 flow [2024-06-28 02:22:19,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:19,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:19,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:19,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 02:22:19,976 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)] === [2024-06-28 02:22:19,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -549303781, now seen corresponding path program 5 times [2024-06-28 02:22:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:19,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356759090] [2024-06-28 02:22:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:20,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:20,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356759090] [2024-06-28 02:22:20,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356759090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:20,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:20,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:20,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509295553] [2024-06-28 02:22:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:20,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:20,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:20,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:20,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:20,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 205 transitions, 2882 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:20,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:20,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:20,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:20,833 INFO L124 PetriNetUnfolderBase]: 2934/4990 cut-off events. [2024-06-28 02:22:20,833 INFO L125 PetriNetUnfolderBase]: For 98580/98584 co-relation queries the response was YES. [2024-06-28 02:22:20,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29195 conditions, 4990 events. 2934/4990 cut-off events. For 98580/98584 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33192 event pairs, 973 based on Foata normal form. 51/5036 useless extension candidates. Maximal degree in co-relation 29126. Up to 4019 conditions per place. [2024-06-28 02:22:20,878 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 100 changer transitions 0/241 dead transitions. [2024-06-28 02:22:20,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 241 transitions, 3620 flow [2024-06-28 02:22:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:22:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:22:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-28 02:22:20,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138888888888889 [2024-06-28 02:22:20,880 INFO L175 Difference]: Start difference. First operand has 143 places, 205 transitions, 2882 flow. Second operand 9 states and 221 transitions. [2024-06-28 02:22:20,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 241 transitions, 3620 flow [2024-06-28 02:22:21,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 241 transitions, 3383 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-28 02:22:21,176 INFO L231 Difference]: Finished difference. Result has 144 places, 207 transitions, 2918 flow [2024-06-28 02:22:21,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2645, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2918, PETRI_PLACES=144, PETRI_TRANSITIONS=207} [2024-06-28 02:22:21,177 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-28 02:22:21,177 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 207 transitions, 2918 flow [2024-06-28 02:22:21,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:21,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:21,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:21,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 02:22:21,178 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)] === [2024-06-28 02:22:21,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:21,178 INFO L85 PathProgramCache]: Analyzing trace with hash -554814031, now seen corresponding path program 6 times [2024-06-28 02:22:21,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:21,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31536492] [2024-06-28 02:22:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:21,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:21,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:21,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31536492] [2024-06-28 02:22:21,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31536492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:21,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:21,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805991039] [2024-06-28 02:22:21,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:21,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:21,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:21,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:21,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:21,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:21,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 207 transitions, 2918 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:21,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:21,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:21,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:22,134 INFO L124 PetriNetUnfolderBase]: 3266/5581 cut-off events. [2024-06-28 02:22:22,134 INFO L125 PetriNetUnfolderBase]: For 113600/113604 co-relation queries the response was YES. [2024-06-28 02:22:22,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32390 conditions, 5581 events. 3266/5581 cut-off events. For 113600/113604 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 38320 event pairs, 1050 based on Foata normal form. 43/5619 useless extension candidates. Maximal degree in co-relation 32320. Up to 3642 conditions per place. [2024-06-28 02:22:22,194 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 154 selfloop transitions, 100 changer transitions 0/261 dead transitions. [2024-06-28 02:22:22,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 261 transitions, 3872 flow [2024-06-28 02:22:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:22:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:22:22,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-28 02:22:22,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-28 02:22:22,198 INFO L175 Difference]: Start difference. First operand has 144 places, 207 transitions, 2918 flow. Second operand 10 states and 252 transitions. [2024-06-28 02:22:22,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 261 transitions, 3872 flow [2024-06-28 02:22:22,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 261 transitions, 3633 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 02:22:22,595 INFO L231 Difference]: Finished difference. Result has 148 places, 212 transitions, 3034 flow [2024-06-28 02:22:22,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3034, PETRI_PLACES=148, PETRI_TRANSITIONS=212} [2024-06-28 02:22:22,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-28 02:22:22,596 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 212 transitions, 3034 flow [2024-06-28 02:22:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:22,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:22,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:22,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 02:22:22,599 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:22,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash -549088579, now seen corresponding path program 1 times [2024-06-28 02:22:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81154664] [2024-06-28 02:22:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:22,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:22,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81154664] [2024-06-28 02:22:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81154664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:22,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:22,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149330327] [2024-06-28 02:22:22,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:22,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:22,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:22,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:22,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:22,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 212 transitions, 3034 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:22,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:22,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:22,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:23,719 INFO L124 PetriNetUnfolderBase]: 3590/6168 cut-off events. [2024-06-28 02:22:23,719 INFO L125 PetriNetUnfolderBase]: For 136274/136278 co-relation queries the response was YES. [2024-06-28 02:22:23,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35971 conditions, 6168 events. 3590/6168 cut-off events. For 136274/136278 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43547 event pairs, 1122 based on Foata normal form. 43/6202 useless extension candidates. Maximal degree in co-relation 35899. Up to 3650 conditions per place. [2024-06-28 02:22:23,872 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 134 selfloop transitions, 115 changer transitions 0/256 dead transitions. [2024-06-28 02:22:23,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 256 transitions, 3940 flow [2024-06-28 02:22:23,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:22:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:22:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-28 02:22:23,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6305555555555555 [2024-06-28 02:22:23,875 INFO L175 Difference]: Start difference. First operand has 148 places, 212 transitions, 3034 flow. Second operand 9 states and 227 transitions. [2024-06-28 02:22:23,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 256 transitions, 3940 flow [2024-06-28 02:22:24,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 256 transitions, 3685 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 02:22:24,121 INFO L231 Difference]: Finished difference. Result has 150 places, 215 transitions, 3123 flow [2024-06-28 02:22:24,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3123, PETRI_PLACES=150, PETRI_TRANSITIONS=215} [2024-06-28 02:22:24,122 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-28 02:22:24,122 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 215 transitions, 3123 flow [2024-06-28 02:22:24,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:24,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:24,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:24,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 02:22:24,122 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)] === [2024-06-28 02:22:24,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:24,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1207930883, now seen corresponding path program 7 times [2024-06-28 02:22:24,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:24,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745374522] [2024-06-28 02:22:24,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:24,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745374522] [2024-06-28 02:22:24,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745374522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:24,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350954521] [2024-06-28 02:22:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:24,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:24,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:24,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:24,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:24,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 215 transitions, 3123 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:24,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:24,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:24,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:25,135 INFO L124 PetriNetUnfolderBase]: 3623/6228 cut-off events. [2024-06-28 02:22:25,136 INFO L125 PetriNetUnfolderBase]: For 134570/134574 co-relation queries the response was YES. [2024-06-28 02:22:25,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36467 conditions, 6228 events. 3623/6228 cut-off events. For 134570/134574 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44141 event pairs, 1374 based on Foata normal form. 17/6240 useless extension candidates. Maximal degree in co-relation 36394. Up to 5567 conditions per place. [2024-06-28 02:22:25,187 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 43 changer transitions 0/247 dead transitions. [2024-06-28 02:22:25,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 247 transitions, 3731 flow [2024-06-28 02:22:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-28 02:22:25,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-28 02:22:25,189 INFO L175 Difference]: Start difference. First operand has 150 places, 215 transitions, 3123 flow. Second operand 8 states and 190 transitions. [2024-06-28 02:22:25,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 247 transitions, 3731 flow [2024-06-28 02:22:25,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 3548 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 02:22:25,506 INFO L231 Difference]: Finished difference. Result has 153 places, 216 transitions, 3067 flow [2024-06-28 02:22:25,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2940, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3067, PETRI_PLACES=153, PETRI_TRANSITIONS=216} [2024-06-28 02:22:25,512 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-28 02:22:25,513 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 216 transitions, 3067 flow [2024-06-28 02:22:25,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:25,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:25,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:25,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 02:22:25,513 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)] === [2024-06-28 02:22:25,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:25,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1207715681, now seen corresponding path program 2 times [2024-06-28 02:22:25,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:25,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915940975] [2024-06-28 02:22:25,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:25,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:25,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:25,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915940975] [2024-06-28 02:22:25,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915940975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:25,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:25,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:25,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667438398] [2024-06-28 02:22:25,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:25,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:25,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:25,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:25,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 216 transitions, 3067 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:25,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:25,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:25,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:26,669 INFO L124 PetriNetUnfolderBase]: 3664/6305 cut-off events. [2024-06-28 02:22:26,669 INFO L125 PetriNetUnfolderBase]: For 138660/138664 co-relation queries the response was YES. [2024-06-28 02:22:26,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36895 conditions, 6305 events. 3664/6305 cut-off events. For 138660/138664 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 44847 event pairs, 1374 based on Foata normal form. 13/6313 useless extension candidates. Maximal degree in co-relation 36820. Up to 5551 conditions per place. [2024-06-28 02:22:26,712 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 199 selfloop transitions, 45 changer transitions 0/251 dead transitions. [2024-06-28 02:22:26,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 251 transitions, 3701 flow [2024-06-28 02:22:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:26,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-28 02:22:26,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-28 02:22:26,714 INFO L175 Difference]: Start difference. First operand has 153 places, 216 transitions, 3067 flow. Second operand 8 states and 193 transitions. [2024-06-28 02:22:26,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 251 transitions, 3701 flow [2024-06-28 02:22:26,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 251 transitions, 3588 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 02:22:26,905 INFO L231 Difference]: Finished difference. Result has 155 places, 217 transitions, 3086 flow [2024-06-28 02:22:26,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3086, PETRI_PLACES=155, PETRI_TRANSITIONS=217} [2024-06-28 02:22:26,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-28 02:22:26,908 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 217 transitions, 3086 flow [2024-06-28 02:22:26,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:26,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:26,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:26,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 02:22:26,909 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)] === [2024-06-28 02:22:26,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash -942018401, now seen corresponding path program 3 times [2024-06-28 02:22:26,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:26,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337677310] [2024-06-28 02:22:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:26,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:27,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:27,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337677310] [2024-06-28 02:22:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337677310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:27,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:27,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:22:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932868047] [2024-06-28 02:22:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:22:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:22:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:22:27,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:27,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 217 transitions, 3086 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:27,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:27,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:27,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:27,857 INFO L124 PetriNetUnfolderBase]: 3644/6273 cut-off events. [2024-06-28 02:22:27,857 INFO L125 PetriNetUnfolderBase]: For 141815/141819 co-relation queries the response was YES. [2024-06-28 02:22:27,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36479 conditions, 6273 events. 3644/6273 cut-off events. For 141815/141819 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 44254 event pairs, 1314 based on Foata normal form. 13/6281 useless extension candidates. Maximal degree in co-relation 36403. Up to 5018 conditions per place. [2024-06-28 02:22:27,910 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 190 selfloop transitions, 54 changer transitions 0/251 dead transitions. [2024-06-28 02:22:27,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 251 transitions, 3632 flow [2024-06-28 02:22:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:27,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:22:27,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:22:27,911 INFO L175 Difference]: Start difference. First operand has 155 places, 217 transitions, 3086 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:22:27,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 251 transitions, 3632 flow [2024-06-28 02:22:28,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 251 transitions, 3512 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 02:22:28,251 INFO L231 Difference]: Finished difference. Result has 156 places, 216 transitions, 3022 flow [2024-06-28 02:22:28,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3022, PETRI_PLACES=156, PETRI_TRANSITIONS=216} [2024-06-28 02:22:28,252 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-28 02:22:28,252 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 216 transitions, 3022 flow [2024-06-28 02:22:28,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 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) [2024-06-28 02:22:28,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:28,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:28,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 02:22:28,253 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:28,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1246283889, now seen corresponding path program 1 times [2024-06-28 02:22:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539606658] [2024-06-28 02:22:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:28,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:28,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:28,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:28,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539606658] [2024-06-28 02:22:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539606658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:28,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:28,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630600351] [2024-06-28 02:22:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:28,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:28,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:28,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 216 transitions, 3022 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-28 02:22:28,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:28,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:28,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:29,233 INFO L124 PetriNetUnfolderBase]: 3482/6049 cut-off events. [2024-06-28 02:22:29,233 INFO L125 PetriNetUnfolderBase]: For 140633/140640 co-relation queries the response was YES. [2024-06-28 02:22:29,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 6049 events. 3482/6049 cut-off events. For 140633/140640 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 43593 event pairs, 1334 based on Foata normal form. 8/6010 useless extension candidates. Maximal degree in co-relation 35230. Up to 5436 conditions per place. [2024-06-28 02:22:29,282 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 176 selfloop transitions, 19 changer transitions 0/228 dead transitions. [2024-06-28 02:22:29,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 228 transitions, 3464 flow [2024-06-28 02:22:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-28 02:22:29,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-28 02:22:29,283 INFO L175 Difference]: Start difference. First operand has 156 places, 216 transitions, 3022 flow. Second operand 5 states and 118 transitions. [2024-06-28 02:22:29,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 228 transitions, 3464 flow [2024-06-28 02:22:29,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 228 transitions, 3265 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-28 02:22:29,537 INFO L231 Difference]: Finished difference. Result has 154 places, 219 transitions, 2903 flow [2024-06-28 02:22:29,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2903, PETRI_PLACES=154, PETRI_TRANSITIONS=219} [2024-06-28 02:22:29,537 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-28 02:22:29,538 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 219 transitions, 2903 flow [2024-06-28 02:22:29,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-28 02:22:29,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:29,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:29,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 02:22:29,538 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:29,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash -186849499, now seen corresponding path program 1 times [2024-06-28 02:22:29,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:29,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588284701] [2024-06-28 02:22:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:29,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:29,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:29,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588284701] [2024-06-28 02:22:29,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588284701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:29,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:29,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:29,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927245864] [2024-06-28 02:22:29,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:29,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:29,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:29,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:29,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:29,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 219 transitions, 2903 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:29,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:29,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:29,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:30,380 INFO L124 PetriNetUnfolderBase]: 3635/6275 cut-off events. [2024-06-28 02:22:30,380 INFO L125 PetriNetUnfolderBase]: For 148824/148824 co-relation queries the response was YES. [2024-06-28 02:22:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36827 conditions, 6275 events. 3635/6275 cut-off events. For 148824/148824 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44818 event pairs, 1342 based on Foata normal form. 1/6274 useless extension candidates. Maximal degree in co-relation 36751. Up to 5774 conditions per place. [2024-06-28 02:22:30,432 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 38 changer transitions 0/261 dead transitions. [2024-06-28 02:22:30,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 261 transitions, 3922 flow [2024-06-28 02:22:30,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:30,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:22:30,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-28 02:22:30,434 INFO L175 Difference]: Start difference. First operand has 154 places, 219 transitions, 2903 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:22:30,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 261 transitions, 3922 flow [2024-06-28 02:22:30,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 261 transitions, 3858 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:30,678 INFO L231 Difference]: Finished difference. Result has 160 places, 242 transitions, 3394 flow [2024-06-28 02:22:30,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2847, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3394, PETRI_PLACES=160, PETRI_TRANSITIONS=242} [2024-06-28 02:22:30,679 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-28 02:22:30,679 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 242 transitions, 3394 flow [2024-06-28 02:22:30,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:30,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:30,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:30,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 02:22:30,680 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:30,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:30,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1423646607, now seen corresponding path program 1 times [2024-06-28 02:22:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644695053] [2024-06-28 02:22:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:30,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:30,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:30,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644695053] [2024-06-28 02:22:30,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644695053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:30,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:30,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:30,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853583961] [2024-06-28 02:22:30,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:30,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:30,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:30,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:30,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 242 transitions, 3394 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:30,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:30,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:30,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:31,542 INFO L124 PetriNetUnfolderBase]: 3642/6291 cut-off events. [2024-06-28 02:22:31,542 INFO L125 PetriNetUnfolderBase]: For 161386/161393 co-relation queries the response was YES. [2024-06-28 02:22:31,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38255 conditions, 6291 events. 3642/6291 cut-off events. For 161386/161393 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 45003 event pairs, 1362 based on Foata normal form. 10/6298 useless extension candidates. Maximal degree in co-relation 38175. Up to 5756 conditions per place. [2024-06-28 02:22:31,594 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 219 selfloop transitions, 40 changer transitions 2/268 dead transitions. [2024-06-28 02:22:31,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 268 transitions, 4133 flow [2024-06-28 02:22:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-28 02:22:31,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-28 02:22:31,596 INFO L175 Difference]: Start difference. First operand has 160 places, 242 transitions, 3394 flow. Second operand 7 states and 159 transitions. [2024-06-28 02:22:31,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 268 transitions, 4133 flow [2024-06-28 02:22:31,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 268 transitions, 4069 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:31,991 INFO L231 Difference]: Finished difference. Result has 168 places, 251 transitions, 3580 flow [2024-06-28 02:22:31,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3580, PETRI_PLACES=168, PETRI_TRANSITIONS=251} [2024-06-28 02:22:31,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-28 02:22:31,992 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 251 transitions, 3580 flow [2024-06-28 02:22:31,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:31,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:31,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:31,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 02:22:31,993 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:31,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1106322029, now seen corresponding path program 2 times [2024-06-28 02:22:31,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165311298] [2024-06-28 02:22:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165311298] [2024-06-28 02:22:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165311298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:32,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:32,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:32,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713301485] [2024-06-28 02:22:32,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:32,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:32,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:32,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 251 transitions, 3580 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:32,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:32,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:32,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:33,015 INFO L124 PetriNetUnfolderBase]: 3645/6301 cut-off events. [2024-06-28 02:22:33,015 INFO L125 PetriNetUnfolderBase]: For 170525/170535 co-relation queries the response was YES. [2024-06-28 02:22:33,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38724 conditions, 6301 events. 3645/6301 cut-off events. For 170525/170535 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 45098 event pairs, 1360 based on Foata normal form. 10/6305 useless extension candidates. Maximal degree in co-relation 38640. Up to 5676 conditions per place. [2024-06-28 02:22:33,081 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 187 selfloop transitions, 77 changer transitions 1/272 dead transitions. [2024-06-28 02:22:33,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 4343 flow [2024-06-28 02:22:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-28 02:22:33,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-28 02:22:33,082 INFO L175 Difference]: Start difference. First operand has 168 places, 251 transitions, 3580 flow. Second operand 6 states and 143 transitions. [2024-06-28 02:22:33,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 4343 flow [2024-06-28 02:22:33,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 272 transitions, 4235 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:33,549 INFO L231 Difference]: Finished difference. Result has 171 places, 256 transitions, 3731 flow [2024-06-28 02:22:33,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3472, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3731, PETRI_PLACES=171, PETRI_TRANSITIONS=256} [2024-06-28 02:22:33,550 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-28 02:22:33,550 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 256 transitions, 3731 flow [2024-06-28 02:22:33,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:33,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:33,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:33,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 02:22:33,551 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:33,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1106084879, now seen corresponding path program 3 times [2024-06-28 02:22:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:33,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190065119] [2024-06-28 02:22:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:33,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:33,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190065119] [2024-06-28 02:22:33,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190065119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:33,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:33,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:33,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918538860] [2024-06-28 02:22:33,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:33,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:33,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:33,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:33,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:33,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:33,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 256 transitions, 3731 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:33,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:33,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:33,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:34,564 INFO L124 PetriNetUnfolderBase]: 3540/6097 cut-off events. [2024-06-28 02:22:34,564 INFO L125 PetriNetUnfolderBase]: For 174386/174393 co-relation queries the response was YES. [2024-06-28 02:22:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37678 conditions, 6097 events. 3540/6097 cut-off events. For 174386/174393 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43121 event pairs, 1308 based on Foata normal form. 12/6106 useless extension candidates. Maximal degree in co-relation 37593. Up to 5498 conditions per place. [2024-06-28 02:22:34,634 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 76 changer transitions 5/274 dead transitions. [2024-06-28 02:22:34,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 274 transitions, 4326 flow [2024-06-28 02:22:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 02:22:34,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-28 02:22:34,635 INFO L175 Difference]: Start difference. First operand has 171 places, 256 transitions, 3731 flow. Second operand 7 states and 164 transitions. [2024-06-28 02:22:34,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 274 transitions, 4326 flow [2024-06-28 02:22:35,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 274 transitions, 4190 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:35,115 INFO L231 Difference]: Finished difference. Result has 175 places, 251 transitions, 3689 flow [2024-06-28 02:22:35,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3689, PETRI_PLACES=175, PETRI_TRANSITIONS=251} [2024-06-28 02:22:35,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-28 02:22:35,116 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 251 transitions, 3689 flow [2024-06-28 02:22:35,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:35,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:35,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:35,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 02:22:35,117 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:35,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:35,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1106330957, now seen corresponding path program 1 times [2024-06-28 02:22:35,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:35,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897488543] [2024-06-28 02:22:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897488543] [2024-06-28 02:22:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897488543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:35,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 02:22:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660327683] [2024-06-28 02:22:35,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 02:22:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:35,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 02:22:35,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 02:22:35,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:35,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 251 transitions, 3689 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-28 02:22:35,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:35,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:35,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:36,061 INFO L124 PetriNetUnfolderBase]: 3225/5582 cut-off events. [2024-06-28 02:22:36,061 INFO L125 PetriNetUnfolderBase]: For 182284/182295 co-relation queries the response was YES. [2024-06-28 02:22:36,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35282 conditions, 5582 events. 3225/5582 cut-off events. For 182284/182295 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39063 event pairs, 1158 based on Foata normal form. 22/5573 useless extension candidates. Maximal degree in co-relation 35196. Up to 4935 conditions per place. [2024-06-28 02:22:36,125 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 207 selfloop transitions, 22 changer transitions 0/266 dead transitions. [2024-06-28 02:22:36,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 266 transitions, 4221 flow [2024-06-28 02:22:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 02:22:36,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 02:22:36,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-28 02:22:36,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-28 02:22:36,127 INFO L175 Difference]: Start difference. First operand has 175 places, 251 transitions, 3689 flow. Second operand 5 states and 121 transitions. [2024-06-28 02:22:36,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 266 transitions, 4221 flow [2024-06-28 02:22:36,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 266 transitions, 4029 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 02:22:36,663 INFO L231 Difference]: Finished difference. Result has 173 places, 253 transitions, 3578 flow [2024-06-28 02:22:36,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3578, PETRI_PLACES=173, PETRI_TRANSITIONS=253} [2024-06-28 02:22:36,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-28 02:22:36,685 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 253 transitions, 3578 flow [2024-06-28 02:22:36,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 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) [2024-06-28 02:22:36,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:36,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:36,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 02:22:36,686 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)] === [2024-06-28 02:22:36,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:36,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1187095605, now seen corresponding path program 1 times [2024-06-28 02:22:36,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:36,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816956176] [2024-06-28 02:22:36,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:36,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:36,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:36,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816956176] [2024-06-28 02:22:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816956176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:36,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705541364] [2024-06-28 02:22:36,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:36,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:36,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:36,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:36,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:36,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 253 transitions, 3578 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:36,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:36,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:36,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:37,641 INFO L124 PetriNetUnfolderBase]: 3343/5737 cut-off events. [2024-06-28 02:22:37,641 INFO L125 PetriNetUnfolderBase]: For 171578/171578 co-relation queries the response was YES. [2024-06-28 02:22:37,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36080 conditions, 5737 events. 3343/5737 cut-off events. For 171578/171578 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39747 event pairs, 1210 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 35993. Up to 5282 conditions per place. [2024-06-28 02:22:37,706 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 42 changer transitions 0/274 dead transitions. [2024-06-28 02:22:37,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 4215 flow [2024-06-28 02:22:37,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:37,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 02:22:37,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:22:37,707 INFO L175 Difference]: Start difference. First operand has 173 places, 253 transitions, 3578 flow. Second operand 7 states and 160 transitions. [2024-06-28 02:22:37,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 4215 flow [2024-06-28 02:22:38,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 4140 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-28 02:22:38,174 INFO L231 Difference]: Finished difference. Result has 177 places, 254 transitions, 3614 flow [2024-06-28 02:22:38,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3511, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3614, PETRI_PLACES=177, PETRI_TRANSITIONS=254} [2024-06-28 02:22:38,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-28 02:22:38,175 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 254 transitions, 3614 flow [2024-06-28 02:22:38,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:38,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:38,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:38,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 02:22:38,176 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:38,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:38,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1697775988, now seen corresponding path program 1 times [2024-06-28 02:22:38,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:38,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553921342] [2024-06-28 02:22:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:38,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:38,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553921342] [2024-06-28 02:22:38,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553921342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:38,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:38,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:38,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522006600] [2024-06-28 02:22:38,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:38,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:38,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:38,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:38,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:38,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:38,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 254 transitions, 3614 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:38,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:38,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:38,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:39,255 INFO L124 PetriNetUnfolderBase]: 3356/5761 cut-off events. [2024-06-28 02:22:39,256 INFO L125 PetriNetUnfolderBase]: For 180560/180567 co-relation queries the response was YES. [2024-06-28 02:22:39,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36462 conditions, 5761 events. 3356/5761 cut-off events. For 180560/180567 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39873 event pairs, 1216 based on Foata normal form. 7/5765 useless extension candidates. Maximal degree in co-relation 36374. Up to 5189 conditions per place. [2024-06-28 02:22:39,325 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 183 selfloop transitions, 89 changer transitions 0/279 dead transitions. [2024-06-28 02:22:39,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 279 transitions, 4378 flow [2024-06-28 02:22:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:39,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 02:22:39,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-28 02:22:39,327 INFO L175 Difference]: Start difference. First operand has 177 places, 254 transitions, 3614 flow. Second operand 8 states and 183 transitions. [2024-06-28 02:22:39,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 279 transitions, 4378 flow [2024-06-28 02:22:39,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 279 transitions, 4258 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 02:22:39,873 INFO L231 Difference]: Finished difference. Result has 181 places, 260 transitions, 3836 flow [2024-06-28 02:22:39,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3836, PETRI_PLACES=181, PETRI_TRANSITIONS=260} [2024-06-28 02:22:39,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-28 02:22:39,874 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 260 transitions, 3836 flow [2024-06-28 02:22:39,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:39,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:39,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 02:22:39,874 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:39,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash 814851012, now seen corresponding path program 2 times [2024-06-28 02:22:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:39,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050898310] [2024-06-28 02:22:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:39,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:39,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050898310] [2024-06-28 02:22:39,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050898310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:39,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:39,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:39,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103970666] [2024-06-28 02:22:39,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:39,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:39,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:39,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:39,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:40,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:40,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 260 transitions, 3836 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:40,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:40,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:40,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:40,936 INFO L124 PetriNetUnfolderBase]: 3377/5796 cut-off events. [2024-06-28 02:22:40,936 INFO L125 PetriNetUnfolderBase]: For 186766/186773 co-relation queries the response was YES. [2024-06-28 02:22:40,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37693 conditions, 5796 events. 3377/5796 cut-off events. For 186766/186773 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40136 event pairs, 1214 based on Foata normal form. 7/5800 useless extension candidates. Maximal degree in co-relation 37603. Up to 5161 conditions per place. [2024-06-28 02:22:41,015 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 195 selfloop transitions, 98 changer transitions 0/300 dead transitions. [2024-06-28 02:22:41,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 300 transitions, 4980 flow [2024-06-28 02:22:41,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:22:41,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 02:22:41,017 INFO L175 Difference]: Start difference. First operand has 181 places, 260 transitions, 3836 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:22:41,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 300 transitions, 4980 flow [2024-06-28 02:22:41,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 300 transitions, 4835 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:41,723 INFO L231 Difference]: Finished difference. Result has 186 places, 277 transitions, 4277 flow [2024-06-28 02:22:41,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4277, PETRI_PLACES=186, PETRI_TRANSITIONS=277} [2024-06-28 02:22:41,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-28 02:22:41,724 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 277 transitions, 4277 flow [2024-06-28 02:22:41,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:41,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:41,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:41,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 02:22:41,725 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:41,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1854729140, now seen corresponding path program 3 times [2024-06-28 02:22:41,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:41,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68811265] [2024-06-28 02:22:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:41,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:41,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68811265] [2024-06-28 02:22:41,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68811265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:41,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:41,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:41,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909246607] [2024-06-28 02:22:41,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:41,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:41,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:41,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:41,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:41,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:41,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 277 transitions, 4277 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:41,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:41,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:41,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:42,823 INFO L124 PetriNetUnfolderBase]: 3382/5802 cut-off events. [2024-06-28 02:22:42,823 INFO L125 PetriNetUnfolderBase]: For 192689/192696 co-relation queries the response was YES. [2024-06-28 02:22:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38894 conditions, 5802 events. 3382/5802 cut-off events. For 192689/192696 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40180 event pairs, 1214 based on Foata normal form. 7/5806 useless extension candidates. Maximal degree in co-relation 38800. Up to 5165 conditions per place. [2024-06-28 02:22:42,906 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 191 selfloop transitions, 101 changer transitions 0/299 dead transitions. [2024-06-28 02:22:42,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 5124 flow [2024-06-28 02:22:42,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 02:22:42,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-28 02:22:42,908 INFO L175 Difference]: Start difference. First operand has 186 places, 277 transitions, 4277 flow. Second operand 7 states and 166 transitions. [2024-06-28 02:22:42,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 5124 flow [2024-06-28 02:22:43,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 299 transitions, 4986 flow, removed 69 selfloop flow, removed 0 redundant places. [2024-06-28 02:22:43,522 INFO L231 Difference]: Finished difference. Result has 193 places, 280 transitions, 4424 flow [2024-06-28 02:22:43,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4159, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4424, PETRI_PLACES=193, PETRI_TRANSITIONS=280} [2024-06-28 02:22:43,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-28 02:22:43,524 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 280 transitions, 4424 flow [2024-06-28 02:22:43,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:43,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:43,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:43,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 02:22:43,524 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:43,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:43,525 INFO L85 PathProgramCache]: Analyzing trace with hash 941570022, now seen corresponding path program 4 times [2024-06-28 02:22:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388791297] [2024-06-28 02:22:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:43,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:43,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388791297] [2024-06-28 02:22:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388791297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:43,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672222574] [2024-06-28 02:22:43,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:43,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:43,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:43,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:43,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 280 transitions, 4424 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:43,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:43,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:43,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:44,617 INFO L124 PetriNetUnfolderBase]: 3416/5850 cut-off events. [2024-06-28 02:22:44,617 INFO L125 PetriNetUnfolderBase]: For 199446/199453 co-relation queries the response was YES. [2024-06-28 02:22:44,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38770 conditions, 5850 events. 3416/5850 cut-off events. For 199446/199453 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40490 event pairs, 1210 based on Foata normal form. 8/5855 useless extension candidates. Maximal degree in co-relation 38673. Up to 5337 conditions per place. [2024-06-28 02:22:44,679 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 50 changer transitions 0/308 dead transitions. [2024-06-28 02:22:44,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 308 transitions, 5413 flow [2024-06-28 02:22:44,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:44,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:22:44,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 02:22:44,681 INFO L175 Difference]: Start difference. First operand has 193 places, 280 transitions, 4424 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:22:44,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 308 transitions, 5413 flow [2024-06-28 02:22:45,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 308 transitions, 5202 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:45,261 INFO L231 Difference]: Finished difference. Result has 199 places, 291 transitions, 4573 flow [2024-06-28 02:22:45,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=199, PETRI_TRANSITIONS=291} [2024-06-28 02:22:45,262 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 158 predicate places. [2024-06-28 02:22:45,262 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 291 transitions, 4573 flow [2024-06-28 02:22:45,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:45,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:45,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:45,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 02:22:45,262 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:45,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:45,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1970199056, now seen corresponding path program 1 times [2024-06-28 02:22:45,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:45,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634365601] [2024-06-28 02:22:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:45,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:45,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:45,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:45,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634365601] [2024-06-28 02:22:45,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634365601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:45,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:45,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303505590] [2024-06-28 02:22:45,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:45,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:45,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:45,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:45,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 291 transitions, 4573 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:45,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:45,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:46,229 INFO L124 PetriNetUnfolderBase]: 3418/5851 cut-off events. [2024-06-28 02:22:46,229 INFO L125 PetriNetUnfolderBase]: For 207560/207567 co-relation queries the response was YES. [2024-06-28 02:22:46,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38966 conditions, 5851 events. 3418/5851 cut-off events. For 207560/207567 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40422 event pairs, 1210 based on Foata normal form. 8/5856 useless extension candidates. Maximal degree in co-relation 38866. Up to 5341 conditions per place. [2024-06-28 02:22:46,296 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 53 changer transitions 0/311 dead transitions. [2024-06-28 02:22:46,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 311 transitions, 5431 flow [2024-06-28 02:22:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:22:46,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 02:22:46,298 INFO L175 Difference]: Start difference. First operand has 199 places, 291 transitions, 4573 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:22:46,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 311 transitions, 5431 flow [2024-06-28 02:22:46,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 311 transitions, 5305 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:46,854 INFO L231 Difference]: Finished difference. Result has 203 places, 294 transitions, 4622 flow [2024-06-28 02:22:46,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4452, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=203, PETRI_TRANSITIONS=294} [2024-06-28 02:22:46,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2024-06-28 02:22:46,855 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 294 transitions, 4622 flow [2024-06-28 02:22:46,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:46,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:46,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 02:22:46,861 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:46,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:46,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1976398580, now seen corresponding path program 2 times [2024-06-28 02:22:46,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:46,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787359739] [2024-06-28 02:22:46,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:46,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:46,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:46,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787359739] [2024-06-28 02:22:46,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787359739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:46,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:46,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332983054] [2024-06-28 02:22:46,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:47,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:47,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 294 transitions, 4622 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:47,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:47,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:47,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:47,804 INFO L124 PetriNetUnfolderBase]: 3439/5886 cut-off events. [2024-06-28 02:22:47,805 INFO L125 PetriNetUnfolderBase]: For 219113/219123 co-relation queries the response was YES. [2024-06-28 02:22:47,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39549 conditions, 5886 events. 3439/5886 cut-off events. For 219113/219123 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40714 event pairs, 1226 based on Foata normal form. 9/5889 useless extension candidates. Maximal degree in co-relation 39448. Up to 5251 conditions per place. [2024-06-28 02:22:47,870 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 104 changer transitions 0/320 dead transitions. [2024-06-28 02:22:47,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 320 transitions, 5695 flow [2024-06-28 02:22:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 02:22:47,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-28 02:22:47,878 INFO L175 Difference]: Start difference. First operand has 203 places, 294 transitions, 4622 flow. Second operand 7 states and 163 transitions. [2024-06-28 02:22:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 320 transitions, 5695 flow [2024-06-28 02:22:48,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 320 transitions, 5545 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 02:22:48,558 INFO L231 Difference]: Finished difference. Result has 205 places, 303 transitions, 4915 flow [2024-06-28 02:22:48,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=205, PETRI_TRANSITIONS=303} [2024-06-28 02:22:48,560 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 02:22:48,560 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 303 transitions, 4915 flow [2024-06-28 02:22:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:48,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:48,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:48,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 02:22:48,560 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)] === [2024-06-28 02:22:48,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2090488820, now seen corresponding path program 5 times [2024-06-28 02:22:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:48,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113078273] [2024-06-28 02:22:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113078273] [2024-06-28 02:22:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113078273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:48,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:48,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:48,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804995720] [2024-06-28 02:22:48,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:48,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:48,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:48,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:48,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:48,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:48,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 303 transitions, 4915 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:48,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:48,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:48,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:49,596 INFO L124 PetriNetUnfolderBase]: 3433/5877 cut-off events. [2024-06-28 02:22:49,596 INFO L125 PetriNetUnfolderBase]: For 227784/227791 co-relation queries the response was YES. [2024-06-28 02:22:49,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39868 conditions, 5877 events. 3433/5877 cut-off events. For 227784/227791 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40675 event pairs, 1213 based on Foata normal form. 8/5882 useless extension candidates. Maximal degree in co-relation 39765. Up to 5246 conditions per place. [2024-06-28 02:22:49,664 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 209 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-28 02:22:49,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 326 transitions, 5765 flow [2024-06-28 02:22:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 02:22:49,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-28 02:22:49,665 INFO L175 Difference]: Start difference. First operand has 205 places, 303 transitions, 4915 flow. Second operand 8 states and 188 transitions. [2024-06-28 02:22:49,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 326 transitions, 5765 flow [2024-06-28 02:22:50,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 326 transitions, 5595 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 02:22:50,398 INFO L231 Difference]: Finished difference. Result has 211 places, 303 transitions, 4981 flow [2024-06-28 02:22:50,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4745, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4981, PETRI_PLACES=211, PETRI_TRANSITIONS=303} [2024-06-28 02:22:50,398 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-28 02:22:50,398 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 303 transitions, 4981 flow [2024-06-28 02:22:50,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:50,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:50,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:50,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 02:22:50,399 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)] === [2024-06-28 02:22:50,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash 2090667566, now seen corresponding path program 3 times [2024-06-28 02:22:50,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:50,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305003285] [2024-06-28 02:22:50,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:50,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:50,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:50,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305003285] [2024-06-28 02:22:50,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305003285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:50,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:50,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350022348] [2024-06-28 02:22:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:50,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:50,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:50,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:50,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 303 transitions, 4981 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:50,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:50,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:50,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:51,367 INFO L124 PetriNetUnfolderBase]: 3435/5881 cut-off events. [2024-06-28 02:22:51,368 INFO L125 PetriNetUnfolderBase]: For 236734/236741 co-relation queries the response was YES. [2024-06-28 02:22:51,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40347 conditions, 5881 events. 3435/5881 cut-off events. For 236734/236741 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40673 event pairs, 1213 based on Foata normal form. 8/5886 useless extension candidates. Maximal degree in co-relation 40242. Up to 5250 conditions per place. [2024-06-28 02:22:51,429 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 210 selfloop transitions, 109 changer transitions 0/326 dead transitions. [2024-06-28 02:22:51,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 326 transitions, 5901 flow [2024-06-28 02:22:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:22:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:22:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-28 02:22:51,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-28 02:22:51,433 INFO L175 Difference]: Start difference. First operand has 211 places, 303 transitions, 4981 flow. Second operand 8 states and 185 transitions. [2024-06-28 02:22:51,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 326 transitions, 5901 flow [2024-06-28 02:22:52,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 326 transitions, 5652 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 02:22:52,328 INFO L231 Difference]: Finished difference. Result has 212 places, 306 transitions, 5040 flow [2024-06-28 02:22:52,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5040, PETRI_PLACES=212, PETRI_TRANSITIONS=306} [2024-06-28 02:22:52,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-28 02:22:52,330 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 306 transitions, 5040 flow [2024-06-28 02:22:52,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:52,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:52,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 02:22:52,334 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)] === [2024-06-28 02:22:52,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1982112500, now seen corresponding path program 4 times [2024-06-28 02:22:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:52,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963397041] [2024-06-28 02:22:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963397041] [2024-06-28 02:22:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963397041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:52,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:52,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158167847] [2024-06-28 02:22:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:52,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:52,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:52,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:52,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 306 transitions, 5040 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:52,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:52,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:52,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:53,338 INFO L124 PetriNetUnfolderBase]: 3432/5876 cut-off events. [2024-06-28 02:22:53,338 INFO L125 PetriNetUnfolderBase]: For 236218/236228 co-relation queries the response was YES. [2024-06-28 02:22:53,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40274 conditions, 5876 events. 3432/5876 cut-off events. For 236218/236228 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40656 event pairs, 1226 based on Foata normal form. 9/5879 useless extension candidates. Maximal degree in co-relation 40169. Up to 5248 conditions per place. [2024-06-28 02:22:53,409 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 108 changer transitions 0/322 dead transitions. [2024-06-28 02:22:53,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 322 transitions, 5868 flow [2024-06-28 02:22:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-28 02:22:53,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-28 02:22:53,410 INFO L175 Difference]: Start difference. First operand has 212 places, 306 transitions, 5040 flow. Second operand 7 states and 163 transitions. [2024-06-28 02:22:53,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 322 transitions, 5868 flow [2024-06-28 02:22:54,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 5517 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-28 02:22:54,125 INFO L231 Difference]: Finished difference. Result has 211 places, 306 transitions, 4915 flow [2024-06-28 02:22:54,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4693, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4915, PETRI_PLACES=211, PETRI_TRANSITIONS=306} [2024-06-28 02:22:54,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-28 02:22:54,125 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 306 transitions, 4915 flow [2024-06-28 02:22:54,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:54,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:54,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 02:22:54,126 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:54,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:54,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1982103572, now seen corresponding path program 1 times [2024-06-28 02:22:54,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:54,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057222178] [2024-06-28 02:22:54,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:54,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:54,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:54,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057222178] [2024-06-28 02:22:54,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057222178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:54,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:54,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:54,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98948898] [2024-06-28 02:22:54,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:54,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:54,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:54,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:54,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:54,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:54,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 306 transitions, 4915 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:54,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:54,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:54,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:55,119 INFO L124 PetriNetUnfolderBase]: 3342/5762 cut-off events. [2024-06-28 02:22:55,120 INFO L125 PetriNetUnfolderBase]: For 240523/240528 co-relation queries the response was YES. [2024-06-28 02:22:55,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39398 conditions, 5762 events. 3342/5762 cut-off events. For 240523/240528 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40325 event pairs, 1199 based on Foata normal form. 14/5743 useless extension candidates. Maximal degree in co-relation 39293. Up to 5090 conditions per place. [2024-06-28 02:22:55,182 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 243 selfloop transitions, 25 changer transitions 0/321 dead transitions. [2024-06-28 02:22:55,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 321 transitions, 5519 flow [2024-06-28 02:22:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-28 02:22:55,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-28 02:22:55,183 INFO L175 Difference]: Start difference. First operand has 211 places, 306 transitions, 4915 flow. Second operand 6 states and 139 transitions. [2024-06-28 02:22:55,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 321 transitions, 5519 flow [2024-06-28 02:22:55,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 321 transitions, 5286 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-28 02:22:55,831 INFO L231 Difference]: Finished difference. Result has 212 places, 307 transitions, 4756 flow [2024-06-28 02:22:55,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4756, PETRI_PLACES=212, PETRI_TRANSITIONS=307} [2024-06-28 02:22:55,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-28 02:22:55,832 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 307 transitions, 4756 flow [2024-06-28 02:22:55,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:55,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:55,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:55,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 02:22:55,832 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:55,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:55,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1967818772, now seen corresponding path program 2 times [2024-06-28 02:22:55,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:55,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748852242] [2024-06-28 02:22:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:55,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:55,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748852242] [2024-06-28 02:22:55,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748852242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:55,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:55,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351736449] [2024-06-28 02:22:55,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:55,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:55,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:56,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-28 02:22:56,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 307 transitions, 4756 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:56,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:56,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-28 02:22:56,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:56,856 INFO L124 PetriNetUnfolderBase]: 3351/5778 cut-off events. [2024-06-28 02:22:56,856 INFO L125 PetriNetUnfolderBase]: For 245262/245267 co-relation queries the response was YES. [2024-06-28 02:22:56,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39375 conditions, 5778 events. 3351/5778 cut-off events. For 245262/245267 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40507 event pairs, 1153 based on Foata normal form. 13/5763 useless extension candidates. Maximal degree in co-relation 39269. Up to 5019 conditions per place. [2024-06-28 02:22:56,923 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 244 selfloop transitions, 28 changer transitions 0/325 dead transitions. [2024-06-28 02:22:56,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 325 transitions, 5388 flow [2024-06-28 02:22:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:22:56,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:22:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-28 02:22:56,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-28 02:22:56,925 INFO L175 Difference]: Start difference. First operand has 212 places, 307 transitions, 4756 flow. Second operand 6 states and 141 transitions. [2024-06-28 02:22:56,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 325 transitions, 5388 flow [2024-06-28 02:22:57,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 325 transitions, 5330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:57,827 INFO L231 Difference]: Finished difference. Result has 214 places, 308 transitions, 4778 flow [2024-06-28 02:22:57,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4778, PETRI_PLACES=214, PETRI_TRANSITIONS=308} [2024-06-28 02:22:57,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-28 02:22:57,828 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 308 transitions, 4778 flow [2024-06-28 02:22:57,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:57,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 02:22:57,829 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:57,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1851881108, now seen corresponding path program 1 times [2024-06-28 02:22:57,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:57,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823979968] [2024-06-28 02:22:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:57,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823979968] [2024-06-28 02:22:57,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823979968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:57,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:57,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:57,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561539966] [2024-06-28 02:22:57,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:57,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:57,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:57,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:57,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 308 transitions, 4778 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:57,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:57,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:57,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:22:58,889 INFO L124 PetriNetUnfolderBase]: 3478/5955 cut-off events. [2024-06-28 02:22:58,890 INFO L125 PetriNetUnfolderBase]: For 252291/252291 co-relation queries the response was YES. [2024-06-28 02:22:58,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40744 conditions, 5955 events. 3478/5955 cut-off events. For 252291/252291 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 41240 event pairs, 1177 based on Foata normal form. 2/5955 useless extension candidates. Maximal degree in co-relation 40637. Up to 5369 conditions per place. [2024-06-28 02:22:58,957 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 285 selfloop transitions, 51 changer transitions 0/343 dead transitions. [2024-06-28 02:22:58,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 343 transitions, 5808 flow [2024-06-28 02:22:58,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:22:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:22:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-28 02:22:58,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:22:58,958 INFO L175 Difference]: Start difference. First operand has 214 places, 308 transitions, 4778 flow. Second operand 7 states and 168 transitions. [2024-06-28 02:22:58,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 343 transitions, 5808 flow [2024-06-28 02:22:59,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 343 transitions, 5740 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 02:22:59,695 INFO L231 Difference]: Finished difference. Result has 218 places, 314 transitions, 4977 flow [2024-06-28 02:22:59,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4712, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4977, PETRI_PLACES=218, PETRI_TRANSITIONS=314} [2024-06-28 02:22:59,696 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-28 02:22:59,696 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 314 transitions, 4977 flow [2024-06-28 02:22:59,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:59,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:22:59,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:22:59,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 02:22:59,696 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:22:59,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:22:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1851941558, now seen corresponding path program 2 times [2024-06-28 02:22:59,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:22:59,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212045110] [2024-06-28 02:22:59,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:22:59,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:22:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:22:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:22:59,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:22:59,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212045110] [2024-06-28 02:22:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212045110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:22:59,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:22:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:22:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881252129] [2024-06-28 02:22:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:22:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:22:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:22:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:22:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:22:59,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:22:59,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 314 transitions, 4977 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:22:59,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:22:59,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:22:59,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:00,737 INFO L124 PetriNetUnfolderBase]: 3473/5946 cut-off events. [2024-06-28 02:23:00,737 INFO L125 PetriNetUnfolderBase]: For 261458/261458 co-relation queries the response was YES. [2024-06-28 02:23:00,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40952 conditions, 5946 events. 3473/5946 cut-off events. For 261458/261458 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 41194 event pairs, 1211 based on Foata normal form. 2/5946 useless extension candidates. Maximal degree in co-relation 40843. Up to 5467 conditions per place. [2024-06-28 02:23:00,803 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 284 selfloop transitions, 44 changer transitions 0/335 dead transitions. [2024-06-28 02:23:00,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 335 transitions, 5729 flow [2024-06-28 02:23:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-28 02:23:00,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-28 02:23:00,810 INFO L175 Difference]: Start difference. First operand has 218 places, 314 transitions, 4977 flow. Second operand 7 states and 160 transitions. [2024-06-28 02:23:00,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 335 transitions, 5729 flow [2024-06-28 02:23:01,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 335 transitions, 5584 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-28 02:23:01,687 INFO L231 Difference]: Finished difference. Result has 222 places, 314 transitions, 4925 flow [2024-06-28 02:23:01,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4832, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4925, PETRI_PLACES=222, PETRI_TRANSITIONS=314} [2024-06-28 02:23:01,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-28 02:23:01,688 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 314 transitions, 4925 flow [2024-06-28 02:23:01,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:01,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:01,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:01,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 02:23:01,689 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:01,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 941763648, now seen corresponding path program 1 times [2024-06-28 02:23:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:01,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069585738] [2024-06-28 02:23:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:01,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:01,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:01,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069585738] [2024-06-28 02:23:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069585738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:01,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:01,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283948903] [2024-06-28 02:23:01,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:01,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:01,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:01,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 314 transitions, 4925 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:01,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:01,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:01,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:02,790 INFO L124 PetriNetUnfolderBase]: 3532/6041 cut-off events. [2024-06-28 02:23:02,790 INFO L125 PetriNetUnfolderBase]: For 288268/288275 co-relation queries the response was YES. [2024-06-28 02:23:02,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41596 conditions, 6041 events. 3532/6041 cut-off events. For 288268/288275 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42032 event pairs, 1225 based on Foata normal form. 26/6064 useless extension candidates. Maximal degree in co-relation 41485. Up to 5465 conditions per place. [2024-06-28 02:23:02,861 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 43 changer transitions 0/336 dead transitions. [2024-06-28 02:23:02,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 5709 flow [2024-06-28 02:23:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-28 02:23:02,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-28 02:23:02,863 INFO L175 Difference]: Start difference. First operand has 222 places, 314 transitions, 4925 flow. Second operand 8 states and 181 transitions. [2024-06-28 02:23:02,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 5709 flow [2024-06-28 02:23:03,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 336 transitions, 5608 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:03,919 INFO L231 Difference]: Finished difference. Result has 225 places, 317 transitions, 4985 flow [2024-06-28 02:23:03,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4824, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4985, PETRI_PLACES=225, PETRI_TRANSITIONS=317} [2024-06-28 02:23:03,919 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-28 02:23:03,920 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 317 transitions, 4985 flow [2024-06-28 02:23:03,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:03,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:03,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:03,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 02:23:03,920 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:03,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2090682446, now seen corresponding path program 2 times [2024-06-28 02:23:03,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:03,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684532448] [2024-06-28 02:23:03,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:03,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:04,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:04,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:04,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684532448] [2024-06-28 02:23:04,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684532448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:04,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514113459] [2024-06-28 02:23:04,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:04,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:04,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:04,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:04,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:04,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 317 transitions, 4985 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:04,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:04,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:04,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:04,991 INFO L124 PetriNetUnfolderBase]: 3614/6179 cut-off events. [2024-06-28 02:23:04,991 INFO L125 PetriNetUnfolderBase]: For 307745/307752 co-relation queries the response was YES. [2024-06-28 02:23:05,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42607 conditions, 6179 events. 3614/6179 cut-off events. For 307745/307752 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 43052 event pairs, 1239 based on Foata normal form. 36/6212 useless extension candidates. Maximal degree in co-relation 42495. Up to 5410 conditions per place. [2024-06-28 02:23:05,064 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 253 selfloop transitions, 84 changer transitions 0/344 dead transitions. [2024-06-28 02:23:05,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 344 transitions, 5821 flow [2024-06-28 02:23:05,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:23:05,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:23:05,080 INFO L175 Difference]: Start difference. First operand has 225 places, 317 transitions, 4985 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:23:05,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 344 transitions, 5821 flow [2024-06-28 02:23:06,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 344 transitions, 5696 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:06,241 INFO L231 Difference]: Finished difference. Result has 227 places, 322 transitions, 5146 flow [2024-06-28 02:23:06,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5146, PETRI_PLACES=227, PETRI_TRANSITIONS=322} [2024-06-28 02:23:06,241 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-28 02:23:06,241 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 322 transitions, 5146 flow [2024-06-28 02:23:06,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:06,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:06,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:06,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 02:23:06,242 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:06,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1968109490, now seen corresponding path program 3 times [2024-06-28 02:23:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:06,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100602899] [2024-06-28 02:23:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:06,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100602899] [2024-06-28 02:23:06,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100602899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:06,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:06,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:06,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331264432] [2024-06-28 02:23:06,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:06,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:06,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:06,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:06,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:06,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:06,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 322 transitions, 5146 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:06,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:06,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:06,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:07,389 INFO L124 PetriNetUnfolderBase]: 3590/6134 cut-off events. [2024-06-28 02:23:07,389 INFO L125 PetriNetUnfolderBase]: For 290188/290198 co-relation queries the response was YES. [2024-06-28 02:23:07,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42571 conditions, 6134 events. 3590/6134 cut-off events. For 290188/290198 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42654 event pairs, 1244 based on Foata normal form. 12/6140 useless extension candidates. Maximal degree in co-relation 42458. Up to 5548 conditions per place. [2024-06-28 02:23:07,468 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 257 selfloop transitions, 76 changer transitions 0/340 dead transitions. [2024-06-28 02:23:07,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 340 transitions, 5898 flow [2024-06-28 02:23:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-28 02:23:07,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 02:23:07,470 INFO L175 Difference]: Start difference. First operand has 227 places, 322 transitions, 5146 flow. Second operand 7 states and 161 transitions. [2024-06-28 02:23:07,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 340 transitions, 5898 flow [2024-06-28 02:23:08,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 340 transitions, 5711 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:08,488 INFO L231 Difference]: Finished difference. Result has 229 places, 325 transitions, 5174 flow [2024-06-28 02:23:08,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4959, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5174, PETRI_PLACES=229, PETRI_TRANSITIONS=325} [2024-06-28 02:23:08,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-28 02:23:08,489 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 325 transitions, 5174 flow [2024-06-28 02:23:08,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:08,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:08,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:08,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 02:23:08,489 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1967812820, now seen corresponding path program 4 times [2024-06-28 02:23:08,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:08,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430524397] [2024-06-28 02:23:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:08,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:08,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:08,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430524397] [2024-06-28 02:23:08,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430524397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:08,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:08,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:23:08,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114780149] [2024-06-28 02:23:08,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:23:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:08,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:23:08,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:23:08,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:08,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 325 transitions, 5174 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:08,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:08,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:08,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:09,545 INFO L124 PetriNetUnfolderBase]: 3566/6094 cut-off events. [2024-06-28 02:23:09,545 INFO L125 PetriNetUnfolderBase]: For 295299/295309 co-relation queries the response was YES. [2024-06-28 02:23:09,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42191 conditions, 6094 events. 3566/6094 cut-off events. For 295299/295309 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42350 event pairs, 1198 based on Foata normal form. 12/6100 useless extension candidates. Maximal degree in co-relation 42077. Up to 5290 conditions per place. [2024-06-28 02:23:09,620 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 88 changer transitions 0/346 dead transitions. [2024-06-28 02:23:09,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 346 transitions, 5942 flow [2024-06-28 02:23:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:23:09,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 02:23:09,624 INFO L175 Difference]: Start difference. First operand has 229 places, 325 transitions, 5174 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:23:09,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 346 transitions, 5942 flow [2024-06-28 02:23:10,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 346 transitions, 5774 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:10,614 INFO L231 Difference]: Finished difference. Result has 233 places, 327 transitions, 5244 flow [2024-06-28 02:23:10,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=233, PETRI_TRANSITIONS=327} [2024-06-28 02:23:10,618 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-28 02:23:10,618 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 327 transitions, 5244 flow [2024-06-28 02:23:10,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:10,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:10,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:10,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 02:23:10,619 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)] === [2024-06-28 02:23:10,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -871962364, now seen corresponding path program 1 times [2024-06-28 02:23:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:10,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213888848] [2024-06-28 02:23:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:10,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213888848] [2024-06-28 02:23:10,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213888848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:10,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:10,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:10,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143311646] [2024-06-28 02:23:10,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:10,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:10,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:10,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:10,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 327 transitions, 5244 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:10,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:10,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:11,766 INFO L124 PetriNetUnfolderBase]: 3610/6161 cut-off events. [2024-06-28 02:23:11,766 INFO L125 PetriNetUnfolderBase]: For 307292/307296 co-relation queries the response was YES. [2024-06-28 02:23:11,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43458 conditions, 6161 events. 3610/6161 cut-off events. For 307292/307296 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42791 event pairs, 1173 based on Foata normal form. 2/6158 useless extension candidates. Maximal degree in co-relation 43342. Up to 5512 conditions per place. [2024-06-28 02:23:11,832 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 113 changer transitions 0/368 dead transitions. [2024-06-28 02:23:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 368 transitions, 6644 flow [2024-06-28 02:23:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 02:23:11,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 02:23:11,833 INFO L175 Difference]: Start difference. First operand has 233 places, 327 transitions, 5244 flow. Second operand 7 states and 171 transitions. [2024-06-28 02:23:11,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 368 transitions, 6644 flow [2024-06-28 02:23:12,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 368 transitions, 6450 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:12,847 INFO L231 Difference]: Finished difference. Result has 238 places, 347 transitions, 5845 flow [2024-06-28 02:23:12,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5068, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5845, PETRI_PLACES=238, PETRI_TRANSITIONS=347} [2024-06-28 02:23:12,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-28 02:23:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 347 transitions, 5845 flow [2024-06-28 02:23:12,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:12,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:12,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:12,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 02:23:12,848 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:12,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:12,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512350, now seen corresponding path program 2 times [2024-06-28 02:23:12,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:12,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193402338] [2024-06-28 02:23:12,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:12,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:12,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:12,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193402338] [2024-06-28 02:23:12,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193402338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:12,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:12,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980247154] [2024-06-28 02:23:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:12,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:12,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:12,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:13,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:13,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 347 transitions, 5845 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:13,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:13,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:13,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:14,001 INFO L124 PetriNetUnfolderBase]: 3606/6160 cut-off events. [2024-06-28 02:23:14,002 INFO L125 PetriNetUnfolderBase]: For 321770/321774 co-relation queries the response was YES. [2024-06-28 02:23:14,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44895 conditions, 6160 events. 3606/6160 cut-off events. For 321770/321774 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42837 event pairs, 1200 based on Foata normal form. 3/6158 useless extension candidates. Maximal degree in co-relation 44776. Up to 5588 conditions per place. [2024-06-28 02:23:14,075 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 288 selfloop transitions, 68 changer transitions 0/363 dead transitions. [2024-06-28 02:23:14,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 363 transitions, 6701 flow [2024-06-28 02:23:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-28 02:23:14,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-28 02:23:14,076 INFO L175 Difference]: Start difference. First operand has 238 places, 347 transitions, 5845 flow. Second operand 7 states and 165 transitions. [2024-06-28 02:23:14,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 363 transitions, 6701 flow [2024-06-28 02:23:15,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 6513 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:15,158 INFO L231 Difference]: Finished difference. Result has 241 places, 348 transitions, 5825 flow [2024-06-28 02:23:15,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5657, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5825, PETRI_PLACES=241, PETRI_TRANSITIONS=348} [2024-06-28 02:23:15,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-28 02:23:15,159 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 348 transitions, 5825 flow [2024-06-28 02:23:15,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:15,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:15,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:15,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 02:23:15,160 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:15,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:15,160 INFO L85 PathProgramCache]: Analyzing trace with hash 2135512536, now seen corresponding path program 1 times [2024-06-28 02:23:15,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:15,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630086834] [2024-06-28 02:23:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:15,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:15,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:15,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630086834] [2024-06-28 02:23:15,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630086834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:15,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:15,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:15,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110327916] [2024-06-28 02:23:15,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:15,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:15,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:15,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:15,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:15,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 348 transitions, 5825 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:15,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:15,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:15,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:16,278 INFO L124 PetriNetUnfolderBase]: 3598/6148 cut-off events. [2024-06-28 02:23:16,279 INFO L125 PetriNetUnfolderBase]: For 330449/330453 co-relation queries the response was YES. [2024-06-28 02:23:16,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44989 conditions, 6148 events. 3598/6148 cut-off events. For 330449/330453 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42761 event pairs, 1224 based on Foata normal form. 3/6146 useless extension candidates. Maximal degree in co-relation 44869. Up to 5580 conditions per place. [2024-06-28 02:23:16,351 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 68 changer transitions 0/362 dead transitions. [2024-06-28 02:23:16,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 362 transitions, 6569 flow [2024-06-28 02:23:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-28 02:23:16,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-28 02:23:16,353 INFO L175 Difference]: Start difference. First operand has 241 places, 348 transitions, 5825 flow. Second operand 7 states and 164 transitions. [2024-06-28 02:23:16,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 362 transitions, 6569 flow [2024-06-28 02:23:17,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 362 transitions, 6402 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:17,508 INFO L231 Difference]: Finished difference. Result has 244 places, 348 transitions, 5816 flow [2024-06-28 02:23:17,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5658, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5816, PETRI_PLACES=244, PETRI_TRANSITIONS=348} [2024-06-28 02:23:17,509 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-28 02:23:17,509 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 348 transitions, 5816 flow [2024-06-28 02:23:17,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:17,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:17,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:17,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 02:23:17,509 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:17,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash 370276726, now seen corresponding path program 2 times [2024-06-28 02:23:17,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:17,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270323928] [2024-06-28 02:23:17,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:17,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270323928] [2024-06-28 02:23:17,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270323928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:17,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:17,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:17,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154068848] [2024-06-28 02:23:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:17,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:17,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:17,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:17,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 348 transitions, 5816 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:17,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:17,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:17,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:18,617 INFO L124 PetriNetUnfolderBase]: 3620/6180 cut-off events. [2024-06-28 02:23:18,617 INFO L125 PetriNetUnfolderBase]: For 342777/342781 co-relation queries the response was YES. [2024-06-28 02:23:18,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45406 conditions, 6180 events. 3620/6180 cut-off events. For 342777/342781 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42958 event pairs, 1213 based on Foata normal form. 3/6178 useless extension candidates. Maximal degree in co-relation 45286. Up to 5509 conditions per place. [2024-06-28 02:23:18,689 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 118 changer transitions 1/378 dead transitions. [2024-06-28 02:23:18,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 378 transitions, 6927 flow [2024-06-28 02:23:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:18,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-28 02:23:18,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-28 02:23:18,690 INFO L175 Difference]: Start difference. First operand has 244 places, 348 transitions, 5816 flow. Second operand 7 states and 170 transitions. [2024-06-28 02:23:18,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 378 transitions, 6927 flow [2024-06-28 02:23:19,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 378 transitions, 6791 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:19,925 INFO L231 Difference]: Finished difference. Result has 247 places, 358 transitions, 6235 flow [2024-06-28 02:23:19,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5680, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6235, PETRI_PLACES=247, PETRI_TRANSITIONS=358} [2024-06-28 02:23:19,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-28 02:23:19,926 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 358 transitions, 6235 flow [2024-06-28 02:23:19,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:19,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:19,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:19,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 02:23:19,926 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:19,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash 370513876, now seen corresponding path program 3 times [2024-06-28 02:23:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066948753] [2024-06-28 02:23:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:20,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:20,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066948753] [2024-06-28 02:23:20,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066948753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:20,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:20,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:20,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876109759] [2024-06-28 02:23:20,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:20,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:20,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:20,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:20,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 358 transitions, 6235 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:20,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:20,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:20,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:21,063 INFO L124 PetriNetUnfolderBase]: 3613/6170 cut-off events. [2024-06-28 02:23:21,064 INFO L125 PetriNetUnfolderBase]: For 352700/352704 co-relation queries the response was YES. [2024-06-28 02:23:21,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45904 conditions, 6170 events. 3613/6170 cut-off events. For 352700/352704 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42820 event pairs, 1219 based on Foata normal form. 2/6167 useless extension candidates. Maximal degree in co-relation 45781. Up to 5504 conditions per place. [2024-06-28 02:23:21,137 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 118 changer transitions 2/376 dead transitions. [2024-06-28 02:23:21,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 376 transitions, 7036 flow [2024-06-28 02:23:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-28 02:23:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-28 02:23:21,138 INFO L175 Difference]: Start difference. First operand has 247 places, 358 transitions, 6235 flow. Second operand 7 states and 169 transitions. [2024-06-28 02:23:21,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 376 transitions, 7036 flow [2024-06-28 02:23:22,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6930 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:22,471 INFO L231 Difference]: Finished difference. Result has 250 places, 357 transitions, 6358 flow [2024-06-28 02:23:22,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6358, PETRI_PLACES=250, PETRI_TRANSITIONS=357} [2024-06-28 02:23:22,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-28 02:23:22,472 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 357 transitions, 6358 flow [2024-06-28 02:23:22,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:22,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:22,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:22,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 02:23:22,473 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:22,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash -335767544, now seen corresponding path program 1 times [2024-06-28 02:23:22,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:22,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261493635] [2024-06-28 02:23:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:22,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:22,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261493635] [2024-06-28 02:23:22,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261493635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:22,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:22,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27185579] [2024-06-28 02:23:22,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:22,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:22,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:22,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 357 transitions, 6358 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:22,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:22,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:22,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:23,578 INFO L124 PetriNetUnfolderBase]: 3593/6140 cut-off events. [2024-06-28 02:23:23,578 INFO L125 PetriNetUnfolderBase]: For 340431/340435 co-relation queries the response was YES. [2024-06-28 02:23:23,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 6140 events. 3593/6140 cut-off events. For 340431/340435 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42569 event pairs, 1057 based on Foata normal form. 7/6142 useless extension candidates. Maximal degree in co-relation 45255. Up to 5610 conditions per place. [2024-06-28 02:23:23,647 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 352 selfloop transitions, 17 changer transitions 0/376 dead transitions. [2024-06-28 02:23:23,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 7153 flow [2024-06-28 02:23:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:23,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-28 02:23:23,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-28 02:23:23,649 INFO L175 Difference]: Start difference. First operand has 250 places, 357 transitions, 6358 flow. Second operand 6 states and 137 transitions. [2024-06-28 02:23:23,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 7153 flow [2024-06-28 02:23:25,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 6906 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:25,124 INFO L231 Difference]: Finished difference. Result has 250 places, 358 transitions, 6154 flow [2024-06-28 02:23:25,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6111, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6154, PETRI_PLACES=250, PETRI_TRANSITIONS=358} [2024-06-28 02:23:25,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-28 02:23:25,126 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 358 transitions, 6154 flow [2024-06-28 02:23:25,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:25,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:25,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:25,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 02:23:25,127 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:25,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash 370184470, now seen corresponding path program 2 times [2024-06-28 02:23:25,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:25,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86507661] [2024-06-28 02:23:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:25,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:25,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:25,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:25,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86507661] [2024-06-28 02:23:25,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86507661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:25,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:25,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:25,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201055011] [2024-06-28 02:23:25,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:25,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:25,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:25,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:25,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 358 transitions, 6154 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:25,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:25,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:25,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:26,358 INFO L124 PetriNetUnfolderBase]: 3580/6121 cut-off events. [2024-06-28 02:23:26,358 INFO L125 PetriNetUnfolderBase]: For 331589/331593 co-relation queries the response was YES. [2024-06-28 02:23:26,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44725 conditions, 6121 events. 3580/6121 cut-off events. For 331589/331593 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42428 event pairs, 1013 based on Foata normal form. 7/6123 useless extension candidates. Maximal degree in co-relation 44602. Up to 5515 conditions per place. [2024-06-28 02:23:26,425 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 341 selfloop transitions, 30 changer transitions 0/378 dead transitions. [2024-06-28 02:23:26,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 378 transitions, 6976 flow [2024-06-28 02:23:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-28 02:23:26,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:23:26,427 INFO L175 Difference]: Start difference. First operand has 250 places, 358 transitions, 6154 flow. Second operand 6 states and 144 transitions. [2024-06-28 02:23:26,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 378 transitions, 6976 flow [2024-06-28 02:23:27,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 378 transitions, 6899 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:27,548 INFO L231 Difference]: Finished difference. Result has 252 places, 358 transitions, 6141 flow [2024-06-28 02:23:27,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6141, PETRI_PLACES=252, PETRI_TRANSITIONS=358} [2024-06-28 02:23:27,549 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-28 02:23:27,549 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 358 transitions, 6141 flow [2024-06-28 02:23:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:27,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:27,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:27,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 02:23:27,550 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:27,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:27,550 INFO L85 PathProgramCache]: Analyzing trace with hash -733434214, now seen corresponding path program 3 times [2024-06-28 02:23:27,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:27,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943113013] [2024-06-28 02:23:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:27,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943113013] [2024-06-28 02:23:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943113013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:27,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934897679] [2024-06-28 02:23:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:27,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:27,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 358 transitions, 6141 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:27,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:27,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:27,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:28,639 INFO L124 PetriNetUnfolderBase]: 3601/6152 cut-off events. [2024-06-28 02:23:28,640 INFO L125 PetriNetUnfolderBase]: For 339050/339054 co-relation queries the response was YES. [2024-06-28 02:23:28,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45265 conditions, 6152 events. 3601/6152 cut-off events. For 339050/339054 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42716 event pairs, 1185 based on Foata normal form. 2/6149 useless extension candidates. Maximal degree in co-relation 45142. Up to 5335 conditions per place. [2024-06-28 02:23:28,721 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 234 selfloop transitions, 155 changer transitions 0/396 dead transitions. [2024-06-28 02:23:28,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 396 transitions, 7371 flow [2024-06-28 02:23:28,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:23:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:23:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-28 02:23:28,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-28 02:23:28,723 INFO L175 Difference]: Start difference. First operand has 252 places, 358 transitions, 6141 flow. Second operand 10 states and 237 transitions. [2024-06-28 02:23:28,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 396 transitions, 7371 flow [2024-06-28 02:23:29,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 396 transitions, 7305 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:29,869 INFO L231 Difference]: Finished difference. Result has 259 places, 364 transitions, 6552 flow [2024-06-28 02:23:29,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6075, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6552, PETRI_PLACES=259, PETRI_TRANSITIONS=364} [2024-06-28 02:23:29,869 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-28 02:23:29,869 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 364 transitions, 6552 flow [2024-06-28 02:23:29,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:29,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:29,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 02:23:29,870 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:29,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash -733314058, now seen corresponding path program 4 times [2024-06-28 02:23:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:29,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708587650] [2024-06-28 02:23:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:29,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708587650] [2024-06-28 02:23:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708587650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:29,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007413280] [2024-06-28 02:23:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:29,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:30,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:30,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 364 transitions, 6552 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:30,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:30,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:30,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:31,078 INFO L124 PetriNetUnfolderBase]: 3626/6205 cut-off events. [2024-06-28 02:23:31,078 INFO L125 PetriNetUnfolderBase]: For 358803/358807 co-relation queries the response was YES. [2024-06-28 02:23:31,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47208 conditions, 6205 events. 3626/6205 cut-off events. For 358803/358807 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43185 event pairs, 1205 based on Foata normal form. 3/6203 useless extension candidates. Maximal degree in co-relation 47083. Up to 5623 conditions per place. [2024-06-28 02:23:31,156 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 51 changer transitions 2/393 dead transitions. [2024-06-28 02:23:31,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 393 transitions, 7512 flow [2024-06-28 02:23:31,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:23:31,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 02:23:31,178 INFO L175 Difference]: Start difference. First operand has 259 places, 364 transitions, 6552 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:23:31,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 393 transitions, 7512 flow [2024-06-28 02:23:32,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 393 transitions, 7253 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-28 02:23:32,618 INFO L231 Difference]: Finished difference. Result has 262 places, 373 transitions, 6542 flow [2024-06-28 02:23:32,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6542, PETRI_PLACES=262, PETRI_TRANSITIONS=373} [2024-06-28 02:23:32,619 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-28 02:23:32,619 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 373 transitions, 6542 flow [2024-06-28 02:23:32,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:32,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:32,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:32,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 02:23:32,620 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:32,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:32,620 INFO L85 PathProgramCache]: Analyzing trace with hash -728071834, now seen corresponding path program 4 times [2024-06-28 02:23:32,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:32,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761551944] [2024-06-28 02:23:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:32,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:32,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761551944] [2024-06-28 02:23:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761551944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:32,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:32,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64305327] [2024-06-28 02:23:32,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:32,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:32,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 373 transitions, 6542 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:32,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:32,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:32,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:33,773 INFO L124 PetriNetUnfolderBase]: 3624/6195 cut-off events. [2024-06-28 02:23:33,773 INFO L125 PetriNetUnfolderBase]: For 364027/364031 co-relation queries the response was YES. [2024-06-28 02:23:33,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46489 conditions, 6195 events. 3624/6195 cut-off events. For 364027/364031 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43034 event pairs, 1197 based on Foata normal form. 2/6192 useless extension candidates. Maximal degree in co-relation 46362. Up to 5355 conditions per place. [2024-06-28 02:23:33,847 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 175 changer transitions 0/403 dead transitions. [2024-06-28 02:23:33,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 403 transitions, 7764 flow [2024-06-28 02:23:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-28 02:23:33,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-28 02:23:33,848 INFO L175 Difference]: Start difference. First operand has 262 places, 373 transitions, 6542 flow. Second operand 9 states and 210 transitions. [2024-06-28 02:23:33,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 403 transitions, 7764 flow [2024-06-28 02:23:35,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 7642 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-28 02:23:35,258 INFO L231 Difference]: Finished difference. Result has 266 places, 379 transitions, 6934 flow [2024-06-28 02:23:35,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6934, PETRI_PLACES=266, PETRI_TRANSITIONS=379} [2024-06-28 02:23:35,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-28 02:23:35,259 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 379 transitions, 6934 flow [2024-06-28 02:23:35,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:35,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:35,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:35,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 02:23:35,260 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:35,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:35,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2075209590, now seen corresponding path program 1 times [2024-06-28 02:23:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288480366] [2024-06-28 02:23:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:35,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:35,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:35,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:35,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288480366] [2024-06-28 02:23:35,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288480366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:35,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:35,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:35,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204942962] [2024-06-28 02:23:35,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:35,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:35,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:35,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:35,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 379 transitions, 6934 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:35,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:35,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:35,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:36,428 INFO L124 PetriNetUnfolderBase]: 3618/6194 cut-off events. [2024-06-28 02:23:36,428 INFO L125 PetriNetUnfolderBase]: For 375849/375856 co-relation queries the response was YES. [2024-06-28 02:23:36,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46880 conditions, 6194 events. 3618/6194 cut-off events. For 375849/375856 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43090 event pairs, 1194 based on Foata normal form. 8/6199 useless extension candidates. Maximal degree in co-relation 46752. Up to 5567 conditions per place. [2024-06-28 02:23:36,507 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 288 selfloop transitions, 103 changer transitions 0/398 dead transitions. [2024-06-28 02:23:36,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 398 transitions, 7762 flow [2024-06-28 02:23:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-28 02:23:36,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-28 02:23:36,508 INFO L175 Difference]: Start difference. First operand has 266 places, 379 transitions, 6934 flow. Second operand 9 states and 201 transitions. [2024-06-28 02:23:36,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 398 transitions, 7762 flow [2024-06-28 02:23:38,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 398 transitions, 7516 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:38,059 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6908 flow [2024-06-28 02:23:38,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6688, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6908, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-28 02:23:38,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-28 02:23:38,060 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6908 flow [2024-06-28 02:23:38,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:38,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:38,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 02:23:38,060 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:23:38,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash -727773304, now seen corresponding path program 5 times [2024-06-28 02:23:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615850568] [2024-06-28 02:23:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:38,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:38,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615850568] [2024-06-28 02:23:38,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615850568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:38,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:38,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:38,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885411375] [2024-06-28 02:23:38,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:38,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:38,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:38,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:38,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 6908 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:38,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:38,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:38,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:39,215 INFO L124 PetriNetUnfolderBase]: 3615/6183 cut-off events. [2024-06-28 02:23:39,216 INFO L125 PetriNetUnfolderBase]: For 384996/385000 co-relation queries the response was YES. [2024-06-28 02:23:39,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47104 conditions, 6183 events. 3615/6183 cut-off events. For 384996/385000 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43031 event pairs, 1198 based on Foata normal form. 2/6180 useless extension candidates. Maximal degree in co-relation 46974. Up to 5349 conditions per place. [2024-06-28 02:23:39,291 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 218 selfloop transitions, 174 changer transitions 0/399 dead transitions. [2024-06-28 02:23:39,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 399 transitions, 7852 flow [2024-06-28 02:23:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:39,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-28 02:23:39,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 02:23:39,293 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6908 flow. Second operand 9 states and 207 transitions. [2024-06-28 02:23:39,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 399 transitions, 7852 flow [2024-06-28 02:23:40,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 399 transitions, 7525 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:40,673 INFO L231 Difference]: Finished difference. Result has 271 places, 379 transitions, 6938 flow [2024-06-28 02:23:40,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6583, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6938, PETRI_PLACES=271, PETRI_TRANSITIONS=379} [2024-06-28 02:23:40,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-28 02:23:40,674 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 379 transitions, 6938 flow [2024-06-28 02:23:40,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:40,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:40,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:40,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 02:23:40,675 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)] === [2024-06-28 02:23:40,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash -413777988, now seen corresponding path program 5 times [2024-06-28 02:23:40,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:40,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743633238] [2024-06-28 02:23:40,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:40,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:40,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:40,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743633238] [2024-06-28 02:23:40,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743633238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:40,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:40,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:40,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769423112] [2024-06-28 02:23:40,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:40,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:40,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:40,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:40,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 379 transitions, 6938 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:40,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:40,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:40,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:41,900 INFO L124 PetriNetUnfolderBase]: 3663/6271 cut-off events. [2024-06-28 02:23:41,900 INFO L125 PetriNetUnfolderBase]: For 390369/390373 co-relation queries the response was YES. [2024-06-28 02:23:41,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47990 conditions, 6271 events. 3663/6271 cut-off events. For 390369/390373 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43754 event pairs, 1202 based on Foata normal form. 3/6269 useless extension candidates. Maximal degree in co-relation 47860. Up to 5602 conditions per place. [2024-06-28 02:23:41,976 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 313 selfloop transitions, 92 changer transitions 1/413 dead transitions. [2024-06-28 02:23:41,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 413 transitions, 8218 flow [2024-06-28 02:23:41,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:23:41,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 02:23:41,977 INFO L175 Difference]: Start difference. First operand has 271 places, 379 transitions, 6938 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:23:41,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 413 transitions, 8218 flow [2024-06-28 02:23:43,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 413 transitions, 7811 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:43,491 INFO L231 Difference]: Finished difference. Result has 273 places, 396 transitions, 7111 flow [2024-06-28 02:23:43,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7111, PETRI_PLACES=273, PETRI_TRANSITIONS=396} [2024-06-28 02:23:43,491 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-28 02:23:43,491 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 396 transitions, 7111 flow [2024-06-28 02:23:43,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:43,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:43,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:43,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 02:23:43,492 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)] === [2024-06-28 02:23:43,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash -413789148, now seen corresponding path program 6 times [2024-06-28 02:23:43,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:43,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543239559] [2024-06-28 02:23:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:43,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:43,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:43,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543239559] [2024-06-28 02:23:43,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543239559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:43,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:43,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:43,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221997639] [2024-06-28 02:23:43,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:43,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:43,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:43,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 396 transitions, 7111 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:43,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:43,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:43,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:44,657 INFO L124 PetriNetUnfolderBase]: 3653/6253 cut-off events. [2024-06-28 02:23:44,657 INFO L125 PetriNetUnfolderBase]: For 398402/398406 co-relation queries the response was YES. [2024-06-28 02:23:44,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47841 conditions, 6253 events. 3653/6253 cut-off events. For 398402/398406 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 43609 event pairs, 1200 based on Foata normal form. 3/6251 useless extension candidates. Maximal degree in co-relation 47708. Up to 5594 conditions per place. [2024-06-28 02:23:44,733 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 316 selfloop transitions, 87 changer transitions 2/412 dead transitions. [2024-06-28 02:23:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 412 transitions, 7959 flow [2024-06-28 02:23:44,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:44,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-28 02:23:44,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 02:23:44,737 INFO L175 Difference]: Start difference. First operand has 273 places, 396 transitions, 7111 flow. Second operand 9 states and 200 transitions. [2024-06-28 02:23:44,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 412 transitions, 7959 flow [2024-06-28 02:23:46,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 412 transitions, 7898 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-06-28 02:23:46,356 INFO L231 Difference]: Finished difference. Result has 281 places, 394 transitions, 7199 flow [2024-06-28 02:23:46,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7199, PETRI_PLACES=281, PETRI_TRANSITIONS=394} [2024-06-28 02:23:46,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-28 02:23:46,357 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 394 transitions, 7199 flow [2024-06-28 02:23:46,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:46,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:46,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:46,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 02:23:46,357 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)] === [2024-06-28 02:23:46,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash 705838400, now seen corresponding path program 7 times [2024-06-28 02:23:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:46,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677111548] [2024-06-28 02:23:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:46,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:46,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:46,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:46,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677111548] [2024-06-28 02:23:46,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677111548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:46,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419983848] [2024-06-28 02:23:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:46,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:46,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:46,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:46,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 394 transitions, 7199 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:46,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:46,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:46,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:47,546 INFO L124 PetriNetUnfolderBase]: 3651/6258 cut-off events. [2024-06-28 02:23:47,546 INFO L125 PetriNetUnfolderBase]: For 411629/411636 co-relation queries the response was YES. [2024-06-28 02:23:47,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48234 conditions, 6258 events. 3651/6258 cut-off events. For 411629/411636 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 43757 event pairs, 1233 based on Foata normal form. 4/6254 useless extension candidates. Maximal degree in co-relation 48099. Up to 5431 conditions per place. [2024-06-28 02:23:47,626 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 152 changer transitions 1/413 dead transitions. [2024-06-28 02:23:47,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 413 transitions, 8343 flow [2024-06-28 02:23:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:23:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:23:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-28 02:23:47,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-28 02:23:47,627 INFO L175 Difference]: Start difference. First operand has 281 places, 394 transitions, 7199 flow. Second operand 7 states and 166 transitions. [2024-06-28 02:23:47,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 413 transitions, 8343 flow [2024-06-28 02:23:49,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 413 transitions, 8129 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-28 02:23:49,234 INFO L231 Difference]: Finished difference. Result has 280 places, 396 transitions, 7336 flow [2024-06-28 02:23:49,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6985, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7336, PETRI_PLACES=280, PETRI_TRANSITIONS=396} [2024-06-28 02:23:49,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-28 02:23:49,234 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 396 transitions, 7336 flow [2024-06-28 02:23:49,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:49,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:49,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 02:23:49,235 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)] === [2024-06-28 02:23:49,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:49,235 INFO L85 PathProgramCache]: Analyzing trace with hash 705718430, now seen corresponding path program 8 times [2024-06-28 02:23:49,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:49,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429477838] [2024-06-28 02:23:49,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:49,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:49,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:49,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:49,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429477838] [2024-06-28 02:23:49,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429477838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:49,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:49,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:49,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649007329] [2024-06-28 02:23:49,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:49,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:49,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:49,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:49,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 396 transitions, 7336 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:49,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:49,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:49,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:50,470 INFO L124 PetriNetUnfolderBase]: 3619/6198 cut-off events. [2024-06-28 02:23:50,470 INFO L125 PetriNetUnfolderBase]: For 419505/419509 co-relation queries the response was YES. [2024-06-28 02:23:50,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48167 conditions, 6198 events. 3619/6198 cut-off events. For 419505/419509 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43126 event pairs, 1186 based on Foata normal form. 2/6195 useless extension candidates. Maximal degree in co-relation 48032. Up to 5686 conditions per place. [2024-06-28 02:23:50,546 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 370 selfloop transitions, 25 changer transitions 4/406 dead transitions. [2024-06-28 02:23:50,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 406 transitions, 8158 flow [2024-06-28 02:23:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 02:23:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 02:23:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-28 02:23:50,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-28 02:23:50,548 INFO L175 Difference]: Start difference. First operand has 280 places, 396 transitions, 7336 flow. Second operand 6 states and 134 transitions. [2024-06-28 02:23:50,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 406 transitions, 8158 flow [2024-06-28 02:23:52,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 406 transitions, 7828 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-28 02:23:52,677 INFO L231 Difference]: Finished difference. Result has 282 places, 392 transitions, 6975 flow [2024-06-28 02:23:52,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7006, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6975, PETRI_PLACES=282, PETRI_TRANSITIONS=392} [2024-06-28 02:23:52,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-28 02:23:52,678 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 392 transitions, 6975 flow [2024-06-28 02:23:52,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:52,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:52,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:52,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 02:23:52,679 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)] === [2024-06-28 02:23:52,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash 698486750, now seen corresponding path program 9 times [2024-06-28 02:23:52,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:52,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979618192] [2024-06-28 02:23:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:52,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:52,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979618192] [2024-06-28 02:23:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979618192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:52,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:52,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610433762] [2024-06-28 02:23:52,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:52,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:52,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:52,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:52,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:52,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 392 transitions, 6975 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:52,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:52,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:52,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:53,871 INFO L124 PetriNetUnfolderBase]: 3546/6069 cut-off events. [2024-06-28 02:23:53,871 INFO L125 PetriNetUnfolderBase]: For 430961/430965 co-relation queries the response was YES. [2024-06-28 02:23:53,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47445 conditions, 6069 events. 3546/6069 cut-off events. For 430961/430965 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41978 event pairs, 1146 based on Foata normal form. 3/6067 useless extension candidates. Maximal degree in co-relation 47309. Up to 5251 conditions per place. [2024-06-28 02:23:53,949 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 159 changer transitions 1/415 dead transitions. [2024-06-28 02:23:53,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 415 transitions, 8045 flow [2024-06-28 02:23:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-28 02:23:53,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-28 02:23:53,950 INFO L175 Difference]: Start difference. First operand has 282 places, 392 transitions, 6975 flow. Second operand 8 states and 189 transitions. [2024-06-28 02:23:53,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 415 transitions, 8045 flow [2024-06-28 02:23:55,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 415 transitions, 7754 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-28 02:23:55,628 INFO L231 Difference]: Finished difference. Result has 281 places, 395 transitions, 7081 flow [2024-06-28 02:23:55,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7081, PETRI_PLACES=281, PETRI_TRANSITIONS=395} [2024-06-28 02:23:55,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-28 02:23:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 395 transitions, 7081 flow [2024-06-28 02:23:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:55,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:55,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 02:23:55,630 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)] === [2024-06-28 02:23:55,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 698475590, now seen corresponding path program 10 times [2024-06-28 02:23:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094826432] [2024-06-28 02:23:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:55,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094826432] [2024-06-28 02:23:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094826432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:55,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:55,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835894785] [2024-06-28 02:23:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:55,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:55,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:55,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:55,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 395 transitions, 7081 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:55,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:55,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:55,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:56,824 INFO L124 PetriNetUnfolderBase]: 3511/6008 cut-off events. [2024-06-28 02:23:56,824 INFO L125 PetriNetUnfolderBase]: For 439775/439779 co-relation queries the response was YES. [2024-06-28 02:23:56,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47103 conditions, 6008 events. 3511/6008 cut-off events. For 439775/439779 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41390 event pairs, 1130 based on Foata normal form. 3/6006 useless extension candidates. Maximal degree in co-relation 46969. Up to 5192 conditions per place. [2024-06-28 02:23:56,903 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 252 selfloop transitions, 159 changer transitions 2/420 dead transitions. [2024-06-28 02:23:56,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 420 transitions, 7969 flow [2024-06-28 02:23:56,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:23:56,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:23:56,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-28 02:23:56,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888888888888889 [2024-06-28 02:23:56,904 INFO L175 Difference]: Start difference. First operand has 281 places, 395 transitions, 7081 flow. Second operand 9 states and 212 transitions. [2024-06-28 02:23:56,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 420 transitions, 7969 flow [2024-06-28 02:23:58,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 420 transitions, 7541 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 02:23:58,531 INFO L231 Difference]: Finished difference. Result has 283 places, 393 transitions, 6962 flow [2024-06-28 02:23:58,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6653, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6962, PETRI_PLACES=283, PETRI_TRANSITIONS=393} [2024-06-28 02:23:58,532 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-28 02:23:58,532 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 393 transitions, 6962 flow [2024-06-28 02:23:58,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:58,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:23:58,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:23:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 02:23:58,533 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)] === [2024-06-28 02:23:58,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:23:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -347037844, now seen corresponding path program 6 times [2024-06-28 02:23:58,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:23:58,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942034513] [2024-06-28 02:23:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:23:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:23:58,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:23:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:23:58,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:23:58,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942034513] [2024-06-28 02:23:58,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942034513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:23:58,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:23:58,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:23:58,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180013267] [2024-06-28 02:23:58,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:23:58,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:23:58,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:23:58,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:23:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:23:58,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:23:58,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 393 transitions, 6962 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:23:58,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:23:58,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:23:58,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:23:59,643 INFO L124 PetriNetUnfolderBase]: 3449/5905 cut-off events. [2024-06-28 02:23:59,643 INFO L125 PetriNetUnfolderBase]: For 453032/453036 co-relation queries the response was YES. [2024-06-28 02:23:59,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 5905 events. 3449/5905 cut-off events. For 453032/453036 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 40523 event pairs, 1097 based on Foata normal form. 2/5902 useless extension candidates. Maximal degree in co-relation 46842. Up to 4889 conditions per place. [2024-06-28 02:23:59,719 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 224 changer transitions 0/434 dead transitions. [2024-06-28 02:23:59,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 434 transitions, 8556 flow [2024-06-28 02:23:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:23:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:23:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-28 02:23:59,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-28 02:23:59,720 INFO L175 Difference]: Start difference. First operand has 283 places, 393 transitions, 6962 flow. Second operand 8 states and 197 transitions. [2024-06-28 02:23:59,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 434 transitions, 8556 flow [2024-06-28 02:24:01,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 434 transitions, 8092 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-28 02:24:01,435 INFO L231 Difference]: Finished difference. Result has 280 places, 407 transitions, 7420 flow [2024-06-28 02:24:01,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7420, PETRI_PLACES=280, PETRI_TRANSITIONS=407} [2024-06-28 02:24:01,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-28 02:24:01,436 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 407 transitions, 7420 flow [2024-06-28 02:24:01,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:01,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:01,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 02:24:01,436 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)] === [2024-06-28 02:24:01,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1307766168, now seen corresponding path program 7 times [2024-06-28 02:24:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:01,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341853120] [2024-06-28 02:24:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:01,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:01,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:01,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341853120] [2024-06-28 02:24:01,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341853120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:01,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:01,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:01,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45801621] [2024-06-28 02:24:01,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:01,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:01,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:01,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:01,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 407 transitions, 7420 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:01,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:01,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:01,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:02,563 INFO L124 PetriNetUnfolderBase]: 3454/5913 cut-off events. [2024-06-28 02:24:02,563 INFO L125 PetriNetUnfolderBase]: For 434379/434383 co-relation queries the response was YES. [2024-06-28 02:24:02,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47889 conditions, 5913 events. 3454/5913 cut-off events. For 434379/434383 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40595 event pairs, 1098 based on Foata normal form. 2/5910 useless extension candidates. Maximal degree in co-relation 47755. Up to 4893 conditions per place. [2024-06-28 02:24:02,645 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 224 changer transitions 0/434 dead transitions. [2024-06-28 02:24:02,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 8781 flow [2024-06-28 02:24:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:24:02,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-28 02:24:02,647 INFO L175 Difference]: Start difference. First operand has 280 places, 407 transitions, 7420 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:24:02,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 434 transitions, 8781 flow [2024-06-28 02:24:04,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 434 transitions, 8445 flow, removed 83 selfloop flow, removed 4 redundant places. [2024-06-28 02:24:04,305 INFO L231 Difference]: Finished difference. Result has 284 places, 410 transitions, 7627 flow [2024-06-28 02:24:04,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7110, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7627, PETRI_PLACES=284, PETRI_TRANSITIONS=410} [2024-06-28 02:24:04,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-28 02:24:04,306 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 410 transitions, 7627 flow [2024-06-28 02:24:04,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:04,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:04,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:04,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 02:24:04,306 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)] === [2024-06-28 02:24:04,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash -346738942, now seen corresponding path program 2 times [2024-06-28 02:24:04,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:04,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006925134] [2024-06-28 02:24:04,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:04,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:04,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:04,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006925134] [2024-06-28 02:24:04,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006925134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:04,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:04,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:04,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990518965] [2024-06-28 02:24:04,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:04,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:04,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:04,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:04,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:04,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:04,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 410 transitions, 7627 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:04,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:04,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:04,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:05,472 INFO L124 PetriNetUnfolderBase]: 3459/5919 cut-off events. [2024-06-28 02:24:05,472 INFO L125 PetriNetUnfolderBase]: For 441610/441617 co-relation queries the response was YES. [2024-06-28 02:24:05,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47002 conditions, 5919 events. 3459/5919 cut-off events. For 441610/441617 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 40576 event pairs, 1086 based on Foata normal form. 7/5923 useless extension candidates. Maximal degree in co-relation 46868. Up to 5197 conditions per place. [2024-06-28 02:24:05,545 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 144 changer transitions 0/436 dead transitions. [2024-06-28 02:24:05,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 436 transitions, 8860 flow [2024-06-28 02:24:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 02:24:05,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-28 02:24:05,546 INFO L175 Difference]: Start difference. First operand has 284 places, 410 transitions, 7627 flow. Second operand 8 states and 188 transitions. [2024-06-28 02:24:05,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 436 transitions, 8860 flow [2024-06-28 02:24:07,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 436 transitions, 8383 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-28 02:24:07,357 INFO L231 Difference]: Finished difference. Result has 287 places, 413 transitions, 7519 flow [2024-06-28 02:24:07,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7154, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7519, PETRI_PLACES=287, PETRI_TRANSITIONS=413} [2024-06-28 02:24:07,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-28 02:24:07,365 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 413 transitions, 7519 flow [2024-06-28 02:24:07,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:07,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:07,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 02:24:07,366 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)] === [2024-06-28 02:24:07,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash 957789780, now seen corresponding path program 3 times [2024-06-28 02:24:07,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:07,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758094115] [2024-06-28 02:24:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:07,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758094115] [2024-06-28 02:24:07,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758094115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:07,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:07,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804110708] [2024-06-28 02:24:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:07,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:07,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 413 transitions, 7519 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:07,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:07,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:07,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:08,592 INFO L124 PetriNetUnfolderBase]: 3464/5932 cut-off events. [2024-06-28 02:24:08,592 INFO L125 PetriNetUnfolderBase]: For 453036/453043 co-relation queries the response was YES. [2024-06-28 02:24:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47058 conditions, 5932 events. 3464/5932 cut-off events. For 453036/453043 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 40702 event pairs, 1089 based on Foata normal form. 7/5936 useless extension candidates. Maximal degree in co-relation 46923. Up to 5203 conditions per place. [2024-06-28 02:24:08,664 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 283 selfloop transitions, 147 changer transitions 0/437 dead transitions. [2024-06-28 02:24:08,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 437 transitions, 8878 flow [2024-06-28 02:24:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:08,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:24:08,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:24:08,666 INFO L175 Difference]: Start difference. First operand has 287 places, 413 transitions, 7519 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:24:08,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 437 transitions, 8878 flow [2024-06-28 02:24:10,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 437 transitions, 8534 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-28 02:24:10,623 INFO L231 Difference]: Finished difference. Result has 289 places, 416 transitions, 7552 flow [2024-06-28 02:24:10,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7552, PETRI_PLACES=289, PETRI_TRANSITIONS=416} [2024-06-28 02:24:10,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-28 02:24:10,624 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 416 transitions, 7552 flow [2024-06-28 02:24:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:10,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:10,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 02:24:10,625 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)] === [2024-06-28 02:24:10,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:10,625 INFO L85 PathProgramCache]: Analyzing trace with hash 2038336406, now seen corresponding path program 8 times [2024-06-28 02:24:10,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:10,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124764465] [2024-06-28 02:24:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:10,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:10,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124764465] [2024-06-28 02:24:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124764465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:10,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:10,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:10,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504681814] [2024-06-28 02:24:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:10,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:10,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:10,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 416 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:10,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:10,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:10,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:11,780 INFO L124 PetriNetUnfolderBase]: 3469/5939 cut-off events. [2024-06-28 02:24:11,780 INFO L125 PetriNetUnfolderBase]: For 466414/466418 co-relation queries the response was YES. [2024-06-28 02:24:11,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47292 conditions, 5939 events. 3469/5939 cut-off events. For 466414/466418 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40747 event pairs, 1097 based on Foata normal form. 2/5936 useless extension candidates. Maximal degree in co-relation 47156. Up to 4905 conditions per place. [2024-06-28 02:24:11,854 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 198 selfloop transitions, 234 changer transitions 0/439 dead transitions. [2024-06-28 02:24:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 439 transitions, 8782 flow [2024-06-28 02:24:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 02:24:11,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-28 02:24:11,855 INFO L175 Difference]: Start difference. First operand has 289 places, 416 transitions, 7552 flow. Second operand 8 states and 188 transitions. [2024-06-28 02:24:11,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 439 transitions, 8782 flow [2024-06-28 02:24:13,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 439 transitions, 8303 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-28 02:24:13,899 INFO L231 Difference]: Finished difference. Result has 290 places, 419 transitions, 7613 flow [2024-06-28 02:24:13,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7073, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7613, PETRI_PLACES=290, PETRI_TRANSITIONS=419} [2024-06-28 02:24:13,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 249 predicate places. [2024-06-28 02:24:13,900 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 419 transitions, 7613 flow [2024-06-28 02:24:13,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:13,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:13,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:13,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 02:24:13,901 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:13,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:13,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1068674858, now seen corresponding path program 4 times [2024-06-28 02:24:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183582985] [2024-06-28 02:24:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:13,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:13,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183582985] [2024-06-28 02:24:13,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183582985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:13,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:13,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605758699] [2024-06-28 02:24:13,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:13,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:13,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:14,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:14,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 419 transitions, 7613 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:14,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:14,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:14,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:15,088 INFO L124 PetriNetUnfolderBase]: 3466/5937 cut-off events. [2024-06-28 02:24:15,088 INFO L125 PetriNetUnfolderBase]: For 478239/478246 co-relation queries the response was YES. [2024-06-28 02:24:15,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47215 conditions, 5937 events. 3466/5937 cut-off events. For 478239/478246 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 40809 event pairs, 1089 based on Foata normal form. 7/5941 useless extension candidates. Maximal degree in co-relation 47080. Up to 5207 conditions per place. [2024-06-28 02:24:15,164 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 285 selfloop transitions, 147 changer transitions 0/439 dead transitions. [2024-06-28 02:24:15,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 439 transitions, 8781 flow [2024-06-28 02:24:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:24:15,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 02:24:15,165 INFO L175 Difference]: Start difference. First operand has 290 places, 419 transitions, 7613 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:24:15,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 439 transitions, 8781 flow [2024-06-28 02:24:16,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 439 transitions, 8493 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-28 02:24:16,995 INFO L231 Difference]: Finished difference. Result has 294 places, 419 transitions, 7625 flow [2024-06-28 02:24:16,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7625, PETRI_PLACES=294, PETRI_TRANSITIONS=419} [2024-06-28 02:24:16,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-28 02:24:16,996 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 419 transitions, 7625 flow [2024-06-28 02:24:16,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:16,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:16,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:16,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 02:24:16,996 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:16,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 946629308, now seen corresponding path program 11 times [2024-06-28 02:24:16,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:16,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882529368] [2024-06-28 02:24:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:16,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:17,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:17,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882529368] [2024-06-28 02:24:17,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882529368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:17,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:17,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:17,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569200100] [2024-06-28 02:24:17,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:17,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:17,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:17,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:17,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:17,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:17,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 419 transitions, 7625 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:17,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:17,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:17,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:18,175 INFO L124 PetriNetUnfolderBase]: 3508/6000 cut-off events. [2024-06-28 02:24:18,175 INFO L125 PetriNetUnfolderBase]: For 504193/504197 co-relation queries the response was YES. [2024-06-28 02:24:18,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48056 conditions, 6000 events. 3508/6000 cut-off events. For 504193/504197 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41163 event pairs, 1093 based on Foata normal form. 3/5998 useless extension candidates. Maximal degree in co-relation 47920. Up to 5273 conditions per place. [2024-06-28 02:24:18,258 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 112 changer transitions 0/451 dead transitions. [2024-06-28 02:24:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 451 transitions, 9095 flow [2024-06-28 02:24:18,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:18,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-28 02:24:18,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-28 02:24:18,260 INFO L175 Difference]: Start difference. First operand has 294 places, 419 transitions, 7625 flow. Second operand 9 states and 204 transitions. [2024-06-28 02:24:18,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 451 transitions, 9095 flow [2024-06-28 02:24:20,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 451 transitions, 8685 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:20,646 INFO L231 Difference]: Finished difference. Result has 296 places, 433 transitions, 7790 flow [2024-06-28 02:24:20,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7790, PETRI_PLACES=296, PETRI_TRANSITIONS=433} [2024-06-28 02:24:20,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-28 02:24:20,647 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 433 transitions, 7790 flow [2024-06-28 02:24:20,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:20,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:20,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:20,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 02:24:20,648 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)] === [2024-06-28 02:24:20,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:20,648 INFO L85 PathProgramCache]: Analyzing trace with hash -870558362, now seen corresponding path program 5 times [2024-06-28 02:24:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:20,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769985669] [2024-06-28 02:24:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:20,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:20,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769985669] [2024-06-28 02:24:20,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769985669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:20,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:20,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:20,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792024046] [2024-06-28 02:24:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:20,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:20,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:20,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:20,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:20,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:20,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 433 transitions, 7790 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:20,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:20,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:20,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:21,855 INFO L124 PetriNetUnfolderBase]: 3505/6004 cut-off events. [2024-06-28 02:24:21,855 INFO L125 PetriNetUnfolderBase]: For 512865/512872 co-relation queries the response was YES. [2024-06-28 02:24:21,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48199 conditions, 6004 events. 3505/6004 cut-off events. For 512865/512872 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41358 event pairs, 1086 based on Foata normal form. 7/6008 useless extension candidates. Maximal degree in co-relation 48061. Up to 5408 conditions per place. [2024-06-28 02:24:21,934 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 382 selfloop transitions, 61 changer transitions 0/450 dead transitions. [2024-06-28 02:24:21,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 450 transitions, 8848 flow [2024-06-28 02:24:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-28 02:24:21,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-28 02:24:21,936 INFO L175 Difference]: Start difference. First operand has 296 places, 433 transitions, 7790 flow. Second operand 9 states and 197 transitions. [2024-06-28 02:24:21,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 450 transitions, 8848 flow [2024-06-28 02:24:24,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 450 transitions, 8708 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-28 02:24:24,604 INFO L231 Difference]: Finished difference. Result has 301 places, 433 transitions, 7778 flow [2024-06-28 02:24:24,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7778, PETRI_PLACES=301, PETRI_TRANSITIONS=433} [2024-06-28 02:24:24,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-28 02:24:24,605 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 433 transitions, 7778 flow [2024-06-28 02:24:24,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:24,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:24,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:24,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 02:24:24,606 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)] === [2024-06-28 02:24:24,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash 941088554, now seen corresponding path program 6 times [2024-06-28 02:24:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872295387] [2024-06-28 02:24:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:24,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:24,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872295387] [2024-06-28 02:24:24,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872295387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:24,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:24,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253709324] [2024-06-28 02:24:24,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:24,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:24,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:24,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 433 transitions, 7778 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:24,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:24,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:24,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:25,791 INFO L124 PetriNetUnfolderBase]: 3502/5999 cut-off events. [2024-06-28 02:24:25,792 INFO L125 PetriNetUnfolderBase]: For 524561/524568 co-relation queries the response was YES. [2024-06-28 02:24:25,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48354 conditions, 5999 events. 3502/5999 cut-off events. For 524561/524568 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41298 event pairs, 1086 based on Foata normal form. 7/6003 useless extension candidates. Maximal degree in co-relation 48214. Up to 5405 conditions per place. [2024-06-28 02:24:25,868 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 381 selfloop transitions, 61 changer transitions 0/449 dead transitions. [2024-06-28 02:24:25,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 449 transitions, 8700 flow [2024-06-28 02:24:25,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:25,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-28 02:24:25,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-28 02:24:25,869 INFO L175 Difference]: Start difference. First operand has 301 places, 433 transitions, 7778 flow. Second operand 9 states and 196 transitions. [2024-06-28 02:24:25,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 449 transitions, 8700 flow [2024-06-28 02:24:27,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 449 transitions, 8532 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:27,787 INFO L231 Difference]: Finished difference. Result has 302 places, 433 transitions, 7738 flow [2024-06-28 02:24:27,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7610, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7738, PETRI_PLACES=302, PETRI_TRANSITIONS=433} [2024-06-28 02:24:27,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 261 predicate places. [2024-06-28 02:24:27,788 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 433 transitions, 7738 flow [2024-06-28 02:24:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:27,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:27,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:27,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 02:24:27,788 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)] === [2024-06-28 02:24:27,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:27,789 INFO L85 PathProgramCache]: Analyzing trace with hash 941088182, now seen corresponding path program 9 times [2024-06-28 02:24:27,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:27,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305805021] [2024-06-28 02:24:27,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:27,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:27,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:27,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305805021] [2024-06-28 02:24:27,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305805021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:27,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:27,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:27,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207029335] [2024-06-28 02:24:27,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:27,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:27,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:27,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:27,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 433 transitions, 7738 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:27,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:27,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:27,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:28,937 INFO L124 PetriNetUnfolderBase]: 3496/5988 cut-off events. [2024-06-28 02:24:28,937 INFO L125 PetriNetUnfolderBase]: For 536511/536515 co-relation queries the response was YES. [2024-06-28 02:24:28,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48328 conditions, 5988 events. 3496/5988 cut-off events. For 536511/536515 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 41195 event pairs, 1094 based on Foata normal form. 3/5986 useless extension candidates. Maximal degree in co-relation 48187. Up to 5264 conditions per place. [2024-06-28 02:24:29,013 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 332 selfloop transitions, 112 changer transitions 0/451 dead transitions. [2024-06-28 02:24:29,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 451 transitions, 8940 flow [2024-06-28 02:24:29,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-28 02:24:29,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-28 02:24:29,015 INFO L175 Difference]: Start difference. First operand has 302 places, 433 transitions, 7738 flow. Second operand 9 states and 204 transitions. [2024-06-28 02:24:29,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 451 transitions, 8940 flow [2024-06-28 02:24:31,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 451 transitions, 8784 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:31,185 INFO L231 Difference]: Finished difference. Result has 303 places, 433 transitions, 7813 flow [2024-06-28 02:24:31,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7582, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7813, PETRI_PLACES=303, PETRI_TRANSITIONS=433} [2024-06-28 02:24:31,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-28 02:24:31,185 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 433 transitions, 7813 flow [2024-06-28 02:24:31,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:31,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:31,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:31,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 02:24:31,186 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:31,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1665056940, now seen corresponding path program 12 times [2024-06-28 02:24:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:31,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357995900] [2024-06-28 02:24:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:31,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:31,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357995900] [2024-06-28 02:24:31,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357995900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:31,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:31,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993942126] [2024-06-28 02:24:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:31,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:31,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:31,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 433 transitions, 7813 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:31,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:31,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:31,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:32,390 INFO L124 PetriNetUnfolderBase]: 3514/6016 cut-off events. [2024-06-28 02:24:32,391 INFO L125 PetriNetUnfolderBase]: For 554004/554008 co-relation queries the response was YES. [2024-06-28 02:24:32,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48999 conditions, 6016 events. 3514/6016 cut-off events. For 554004/554008 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 41391 event pairs, 1091 based on Foata normal form. 3/6014 useless extension candidates. Maximal degree in co-relation 48857. Up to 5042 conditions per place. [2024-06-28 02:24:32,466 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 212 changer transitions 0/463 dead transitions. [2024-06-28 02:24:32,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 463 transitions, 9254 flow [2024-06-28 02:24:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-28 02:24:32,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-28 02:24:32,467 INFO L175 Difference]: Start difference. First operand has 303 places, 433 transitions, 7813 flow. Second operand 9 states and 209 transitions. [2024-06-28 02:24:32,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 463 transitions, 9254 flow [2024-06-28 02:24:35,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 463 transitions, 8977 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-28 02:24:35,011 INFO L231 Difference]: Finished difference. Result has 305 places, 442 transitions, 8183 flow [2024-06-28 02:24:35,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7536, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8183, PETRI_PLACES=305, PETRI_TRANSITIONS=442} [2024-06-28 02:24:35,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-28 02:24:35,012 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 442 transitions, 8183 flow [2024-06-28 02:24:35,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:35,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:35,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:35,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 02:24:35,012 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:35,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash 386186008, now seen corresponding path program 7 times [2024-06-28 02:24:35,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:35,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093675482] [2024-06-28 02:24:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:35,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093675482] [2024-06-28 02:24:35,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093675482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:35,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:35,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:35,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967167174] [2024-06-28 02:24:35,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:35,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:35,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:35,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:35,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:35,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:35,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 442 transitions, 8183 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:35,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:35,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:35,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:36,249 INFO L124 PetriNetUnfolderBase]: 3519/6029 cut-off events. [2024-06-28 02:24:36,249 INFO L125 PetriNetUnfolderBase]: For 566893/566900 co-relation queries the response was YES. [2024-06-28 02:24:36,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49550 conditions, 6029 events. 3519/6029 cut-off events. For 566893/566900 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41567 event pairs, 1086 based on Foata normal form. 7/6033 useless extension candidates. Maximal degree in co-relation 49407. Up to 5315 conditions per place. [2024-06-28 02:24:36,331 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 339 selfloop transitions, 120 changer transitions 0/466 dead transitions. [2024-06-28 02:24:36,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 466 transitions, 9493 flow [2024-06-28 02:24:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-28 02:24:36,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-28 02:24:36,332 INFO L175 Difference]: Start difference. First operand has 305 places, 442 transitions, 8183 flow. Second operand 9 states and 203 transitions. [2024-06-28 02:24:36,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 466 transitions, 9493 flow [2024-06-28 02:24:38,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 466 transitions, 9343 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 02:24:38,422 INFO L231 Difference]: Finished difference. Result has 310 places, 445 transitions, 8349 flow [2024-06-28 02:24:38,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8037, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8349, PETRI_PLACES=310, PETRI_TRANSITIONS=445} [2024-06-28 02:24:38,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-28 02:24:38,423 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 445 transitions, 8349 flow [2024-06-28 02:24:38,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:38,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:38,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:38,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 02:24:38,423 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:38,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash 380644696, now seen corresponding path program 10 times [2024-06-28 02:24:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358010237] [2024-06-28 02:24:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:38,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:38,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:38,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358010237] [2024-06-28 02:24:38,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358010237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:38,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:38,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:38,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383308721] [2024-06-28 02:24:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:38,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:38,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:38,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:38,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:38,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 445 transitions, 8349 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:38,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:38,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:38,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:39,600 INFO L124 PetriNetUnfolderBase]: 3513/6020 cut-off events. [2024-06-28 02:24:39,600 INFO L125 PetriNetUnfolderBase]: For 565910/565914 co-relation queries the response was YES. [2024-06-28 02:24:39,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49565 conditions, 6020 events. 3513/6020 cut-off events. For 565910/565914 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 41519 event pairs, 1094 based on Foata normal form. 3/6018 useless extension candidates. Maximal degree in co-relation 49420. Up to 5041 conditions per place. [2024-06-28 02:24:39,678 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 220 changer transitions 0/472 dead transitions. [2024-06-28 02:24:39,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 472 transitions, 9625 flow [2024-06-28 02:24:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:39,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-28 02:24:39,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:24:39,680 INFO L175 Difference]: Start difference. First operand has 310 places, 445 transitions, 8349 flow. Second operand 9 states and 216 transitions. [2024-06-28 02:24:39,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 472 transitions, 9625 flow [2024-06-28 02:24:42,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 472 transitions, 9362 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-28 02:24:42,012 INFO L231 Difference]: Finished difference. Result has 312 places, 445 transitions, 8546 flow [2024-06-28 02:24:42,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8090, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8546, PETRI_PLACES=312, PETRI_TRANSITIONS=445} [2024-06-28 02:24:42,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-28 02:24:42,013 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 445 transitions, 8546 flow [2024-06-28 02:24:42,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:42,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:42,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:42,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 02:24:42,013 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:42,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:42,014 INFO L85 PathProgramCache]: Analyzing trace with hash 380645068, now seen corresponding path program 8 times [2024-06-28 02:24:42,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:42,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153149183] [2024-06-28 02:24:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:42,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:42,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:42,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153149183] [2024-06-28 02:24:42,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153149183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:42,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:42,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170999572] [2024-06-28 02:24:42,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:42,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:42,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:42,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:42,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 445 transitions, 8546 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:42,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:42,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:42,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:43,249 INFO L124 PetriNetUnfolderBase]: 3510/6015 cut-off events. [2024-06-28 02:24:43,249 INFO L125 PetriNetUnfolderBase]: For 563171/563178 co-relation queries the response was YES. [2024-06-28 02:24:43,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49706 conditions, 6015 events. 3510/6015 cut-off events. For 563171/563178 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 41388 event pairs, 1083 based on Foata normal form. 7/6019 useless extension candidates. Maximal degree in co-relation 49561. Up to 5304 conditions per place. [2024-06-28 02:24:43,331 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 337 selfloop transitions, 124 changer transitions 0/468 dead transitions. [2024-06-28 02:24:43,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 468 transitions, 9664 flow [2024-06-28 02:24:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-28 02:24:43,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-28 02:24:43,332 INFO L175 Difference]: Start difference. First operand has 312 places, 445 transitions, 8546 flow. Second operand 9 states and 205 transitions. [2024-06-28 02:24:43,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 468 transitions, 9664 flow [2024-06-28 02:24:45,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 468 transitions, 9145 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:45,899 INFO L231 Difference]: Finished difference. Result has 311 places, 445 transitions, 8287 flow [2024-06-28 02:24:45,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8029, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8287, PETRI_PLACES=311, PETRI_TRANSITIONS=445} [2024-06-28 02:24:45,900 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-28 02:24:45,900 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 445 transitions, 8287 flow [2024-06-28 02:24:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:45,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:45,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:45,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 02:24:45,901 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:45,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944640, now seen corresponding path program 13 times [2024-06-28 02:24:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:45,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645261562] [2024-06-28 02:24:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:45,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:45,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:45,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645261562] [2024-06-28 02:24:45,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645261562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:45,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802830051] [2024-06-28 02:24:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:45,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:46,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:46,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 445 transitions, 8287 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:46,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:46,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:46,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:47,052 INFO L124 PetriNetUnfolderBase]: 3523/6035 cut-off events. [2024-06-28 02:24:47,053 INFO L125 PetriNetUnfolderBase]: For 566351/566358 co-relation queries the response was YES. [2024-06-28 02:24:47,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49670 conditions, 6035 events. 3523/6035 cut-off events. For 566351/566358 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41611 event pairs, 1122 based on Foata normal form. 4/6031 useless extension candidates. Maximal degree in co-relation 49525. Up to 5049 conditions per place. [2024-06-28 02:24:47,133 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 248 selfloop transitions, 215 changer transitions 0/470 dead transitions. [2024-06-28 02:24:47,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 470 transitions, 9967 flow [2024-06-28 02:24:47,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-28 02:24:47,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-28 02:24:47,135 INFO L175 Difference]: Start difference. First operand has 311 places, 445 transitions, 8287 flow. Second operand 8 states and 188 transitions. [2024-06-28 02:24:47,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 470 transitions, 9967 flow [2024-06-28 02:24:49,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 470 transitions, 9608 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-28 02:24:49,857 INFO L231 Difference]: Finished difference. Result has 309 places, 451 transitions, 8522 flow [2024-06-28 02:24:49,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7936, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8522, PETRI_PLACES=309, PETRI_TRANSITIONS=451} [2024-06-28 02:24:49,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-28 02:24:49,857 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 451 transitions, 8522 flow [2024-06-28 02:24:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:49,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:49,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:49,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 02:24:49,858 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:49,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash 122630972, now seen corresponding path program 14 times [2024-06-28 02:24:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:49,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953046760] [2024-06-28 02:24:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:49,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:49,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:49,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953046760] [2024-06-28 02:24:49,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953046760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:49,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:49,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:49,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712420810] [2024-06-28 02:24:49,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:49,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:49,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:49,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:50,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:50,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 451 transitions, 8522 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:50,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:50,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:50,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:51,153 INFO L124 PetriNetUnfolderBase]: 3520/6024 cut-off events. [2024-06-28 02:24:51,153 INFO L125 PetriNetUnfolderBase]: For 562753/562757 co-relation queries the response was YES. [2024-06-28 02:24:51,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49653 conditions, 6024 events. 3520/6024 cut-off events. For 562753/562757 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 41489 event pairs, 1089 based on Foata normal form. 2/6021 useless extension candidates. Maximal degree in co-relation 49509. Up to 5485 conditions per place. [2024-06-28 02:24:51,229 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 424 selfloop transitions, 31 changer transitions 0/462 dead transitions. [2024-06-28 02:24:51,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 462 transitions, 9458 flow [2024-06-28 02:24:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 02:24:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 02:24:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-28 02:24:51,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-28 02:24:51,230 INFO L175 Difference]: Start difference. First operand has 309 places, 451 transitions, 8522 flow. Second operand 7 states and 152 transitions. [2024-06-28 02:24:51,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 462 transitions, 9458 flow [2024-06-28 02:24:53,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 462 transitions, 8882 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-28 02:24:53,670 INFO L231 Difference]: Finished difference. Result has 311 places, 451 transitions, 8014 flow [2024-06-28 02:24:53,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7946, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8014, PETRI_PLACES=311, PETRI_TRANSITIONS=451} [2024-06-28 02:24:53,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-28 02:24:53,671 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 451 transitions, 8014 flow [2024-06-28 02:24:53,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:53,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:53,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:53,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 02:24:53,680 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:53,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1315944454, now seen corresponding path program 9 times [2024-06-28 02:24:53,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:53,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889791305] [2024-06-28 02:24:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:53,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:53,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:53,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889791305] [2024-06-28 02:24:53,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889791305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:53,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:53,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:53,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497683157] [2024-06-28 02:24:53,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:53,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:53,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:53,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:53,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:53,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 451 transitions, 8014 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:53,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:53,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:53,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:54,889 INFO L124 PetriNetUnfolderBase]: 3525/6051 cut-off events. [2024-06-28 02:24:54,890 INFO L125 PetriNetUnfolderBase]: For 575106/575116 co-relation queries the response was YES. [2024-06-28 02:24:54,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49196 conditions, 6051 events. 3525/6051 cut-off events. For 575106/575116 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41844 event pairs, 1105 based on Foata normal form. 9/6054 useless extension candidates. Maximal degree in co-relation 49052. Up to 5324 conditions per place. [2024-06-28 02:24:54,971 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 342 selfloop transitions, 122 changer transitions 0/471 dead transitions. [2024-06-28 02:24:54,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 471 transitions, 9187 flow [2024-06-28 02:24:54,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:24:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:24:54,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-28 02:24:54,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 02:24:54,972 INFO L175 Difference]: Start difference. First operand has 311 places, 451 transitions, 8014 flow. Second operand 9 states and 198 transitions. [2024-06-28 02:24:54,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 471 transitions, 9187 flow [2024-06-28 02:24:57,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 471 transitions, 9073 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-28 02:24:57,363 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8213 flow [2024-06-28 02:24:57,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7900, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8213, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-28 02:24:57,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-28 02:24:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8213 flow [2024-06-28 02:24:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:57,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:24:57,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:24:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 02:24:57,365 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:24:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:24:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1858996536, now seen corresponding path program 10 times [2024-06-28 02:24:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:24:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894074248] [2024-06-28 02:24:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:24:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:24:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:24:57,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:24:57,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:24:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894074248] [2024-06-28 02:24:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894074248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:24:57,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:24:57,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:24:57,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634811817] [2024-06-28 02:24:57,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:24:57,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:24:57,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:24:57,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:24:57,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:24:57,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:24:57,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8213 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:24:57,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:24:57,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:24:57,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:24:58,573 INFO L124 PetriNetUnfolderBase]: 3522/6043 cut-off events. [2024-06-28 02:24:58,574 INFO L125 PetriNetUnfolderBase]: For 588958/588968 co-relation queries the response was YES. [2024-06-28 02:24:58,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49499 conditions, 6043 events. 3522/6043 cut-off events. For 588958/588968 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 41751 event pairs, 1103 based on Foata normal form. 9/6046 useless extension candidates. Maximal degree in co-relation 49355. Up to 5321 conditions per place. [2024-06-28 02:24:58,653 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 341 selfloop transitions, 121 changer transitions 0/469 dead transitions. [2024-06-28 02:24:58,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 469 transitions, 9173 flow [2024-06-28 02:24:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:24:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:24:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-28 02:24:58,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-28 02:24:58,654 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8213 flow. Second operand 8 states and 178 transitions. [2024-06-28 02:24:58,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 469 transitions, 9173 flow [2024-06-28 02:25:00,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 469 transitions, 8744 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-28 02:25:00,948 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8032 flow [2024-06-28 02:25:00,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8032, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-28 02:25:00,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-28 02:25:00,948 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8032 flow [2024-06-28 02:25:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:00,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:00,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:00,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 02:25:00,949 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:25:00,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1138813120, now seen corresponding path program 15 times [2024-06-28 02:25:00,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:00,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694513112] [2024-06-28 02:25:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:00,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:01,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:01,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694513112] [2024-06-28 02:25:01,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694513112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:01,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:01,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:25:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072351547] [2024-06-28 02:25:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:01,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:25:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:25:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:25:01,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:01,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8032 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:01,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:01,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:01,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:02,092 INFO L124 PetriNetUnfolderBase]: 3519/6032 cut-off events. [2024-06-28 02:25:02,092 INFO L125 PetriNetUnfolderBase]: For 600805/600812 co-relation queries the response was YES. [2024-06-28 02:25:02,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49290 conditions, 6032 events. 3519/6032 cut-off events. For 600805/600812 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 41632 event pairs, 1122 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 49146. Up to 5047 conditions per place. [2024-06-28 02:25:02,170 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 218 changer transitions 0/471 dead transitions. [2024-06-28 02:25:02,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 471 transitions, 9292 flow [2024-06-28 02:25:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:25:02,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 02:25:02,171 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8032 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:25:02,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 471 transitions, 9292 flow [2024-06-28 02:25:04,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 471 transitions, 8954 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 02:25:04,890 INFO L231 Difference]: Finished difference. Result has 312 places, 454 transitions, 8136 flow [2024-06-28 02:25:04,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7694, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8136, PETRI_PLACES=312, PETRI_TRANSITIONS=454} [2024-06-28 02:25:04,891 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-28 02:25:04,891 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 454 transitions, 8136 flow [2024-06-28 02:25:04,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:04,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:04,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:04,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 02:25:04,892 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)] === [2024-06-28 02:25:04,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1409342124, now seen corresponding path program 1 times [2024-06-28 02:25:04,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:04,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835442899] [2024-06-28 02:25:04,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:04,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:04,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:04,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:04,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:04,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835442899] [2024-06-28 02:25:04,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835442899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:04,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:04,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:25:04,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517610005] [2024-06-28 02:25:04,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:04,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:25:04,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:04,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:25:04,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:25:05,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:05,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 454 transitions, 8136 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:05,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:05,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:05,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:06,111 INFO L124 PetriNetUnfolderBase]: 3539/6064 cut-off events. [2024-06-28 02:25:06,111 INFO L125 PetriNetUnfolderBase]: For 628961/628961 co-relation queries the response was YES. [2024-06-28 02:25:06,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49892 conditions, 6064 events. 3539/6064 cut-off events. For 628961/628961 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 41836 event pairs, 1039 based on Foata normal form. 6/6068 useless extension candidates. Maximal degree in co-relation 49747. Up to 5383 conditions per place. [2024-06-28 02:25:06,192 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 428 selfloop transitions, 52 changer transitions 0/487 dead transitions. [2024-06-28 02:25:06,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 487 transitions, 9278 flow [2024-06-28 02:25:06,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:25:06,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:25:06,193 INFO L175 Difference]: Start difference. First operand has 312 places, 454 transitions, 8136 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:25:06,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 487 transitions, 9278 flow [2024-06-28 02:25:08,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 487 transitions, 8461 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-28 02:25:08,985 INFO L231 Difference]: Finished difference. Result has 310 places, 455 transitions, 7457 flow [2024-06-28 02:25:08,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7457, PETRI_PLACES=310, PETRI_TRANSITIONS=455} [2024-06-28 02:25:08,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-28 02:25:08,986 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 455 transitions, 7457 flow [2024-06-28 02:25:08,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:08,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:08,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:08,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 02:25:08,986 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)] === [2024-06-28 02:25:08,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:08,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1662454218, now seen corresponding path program 2 times [2024-06-28 02:25:08,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:08,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729411370] [2024-06-28 02:25:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:08,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:09,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729411370] [2024-06-28 02:25:09,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729411370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:09,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:25:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375816049] [2024-06-28 02:25:09,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:09,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:25:09,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:25:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:25:09,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:09,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 455 transitions, 7457 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:09,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:09,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:09,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:10,247 INFO L124 PetriNetUnfolderBase]: 3567/6118 cut-off events. [2024-06-28 02:25:10,248 INFO L125 PetriNetUnfolderBase]: For 645874/645874 co-relation queries the response was YES. [2024-06-28 02:25:10,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49707 conditions, 6118 events. 3567/6118 cut-off events. For 645874/645874 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 42293 event pairs, 1090 based on Foata normal form. 8/6124 useless extension candidates. Maximal degree in co-relation 49562. Up to 5527 conditions per place. [2024-06-28 02:25:10,326 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 431 selfloop transitions, 43 changer transitions 0/481 dead transitions. [2024-06-28 02:25:10,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 481 transitions, 8555 flow [2024-06-28 02:25:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:10,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-28 02:25:10,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-28 02:25:10,328 INFO L175 Difference]: Start difference. First operand has 310 places, 455 transitions, 7457 flow. Second operand 8 states and 180 transitions. [2024-06-28 02:25:10,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 481 transitions, 8555 flow [2024-06-28 02:25:13,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 481 transitions, 8427 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-28 02:25:13,019 INFO L231 Difference]: Finished difference. Result has 311 places, 456 transitions, 7445 flow [2024-06-28 02:25:13,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7445, PETRI_PLACES=311, PETRI_TRANSITIONS=456} [2024-06-28 02:25:13,020 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-28 02:25:13,020 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 456 transitions, 7445 flow [2024-06-28 02:25:13,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:13,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:13,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:13,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 02:25:13,020 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)] === [2024-06-28 02:25:13,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:13,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1575614538, now seen corresponding path program 3 times [2024-06-28 02:25:13,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:13,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362803519] [2024-06-28 02:25:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:13,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:13,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:13,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362803519] [2024-06-28 02:25:13,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362803519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:13,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:13,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:25:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762794155] [2024-06-28 02:25:13,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:13,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:25:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:25:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:25:13,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:13,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 456 transitions, 7445 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:13,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:13,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:13,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:14,252 INFO L124 PetriNetUnfolderBase]: 3587/6154 cut-off events. [2024-06-28 02:25:14,252 INFO L125 PetriNetUnfolderBase]: For 656125/656125 co-relation queries the response was YES. [2024-06-28 02:25:14,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49997 conditions, 6154 events. 3587/6154 cut-off events. For 656125/656125 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42599 event pairs, 1090 based on Foata normal form. 6/6158 useless extension candidates. Maximal degree in co-relation 49851. Up to 5529 conditions per place. [2024-06-28 02:25:14,337 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 433 selfloop transitions, 46 changer transitions 0/486 dead transitions. [2024-06-28 02:25:14,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 486 transitions, 8572 flow [2024-06-28 02:25:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:25:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:25:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-28 02:25:14,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 02:25:14,338 INFO L175 Difference]: Start difference. First operand has 311 places, 456 transitions, 7445 flow. Second operand 9 states and 200 transitions. [2024-06-28 02:25:14,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 486 transitions, 8572 flow [2024-06-28 02:25:16,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 486 transitions, 8471 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-28 02:25:16,741 INFO L231 Difference]: Finished difference. Result has 314 places, 457 transitions, 7466 flow [2024-06-28 02:25:16,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7344, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7466, PETRI_PLACES=314, PETRI_TRANSITIONS=457} [2024-06-28 02:25:16,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-28 02:25:16,742 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 457 transitions, 7466 flow [2024-06-28 02:25:16,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:16,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:16,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:16,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 02:25:16,743 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)] === [2024-06-28 02:25:16,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:16,743 INFO L85 PathProgramCache]: Analyzing trace with hash -875822534, now seen corresponding path program 4 times [2024-06-28 02:25:16,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:16,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454410303] [2024-06-28 02:25:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:16,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454410303] [2024-06-28 02:25:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454410303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:16,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:16,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:25:16,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273751599] [2024-06-28 02:25:16,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:16,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:25:16,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:16,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:25:16,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:25:16,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:16,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 457 transitions, 7466 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-28 02:25:16,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:16,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:17,965 INFO L124 PetriNetUnfolderBase]: 3655/6270 cut-off events. [2024-06-28 02:25:17,965 INFO L125 PetriNetUnfolderBase]: For 702220/702227 co-relation queries the response was YES. [2024-06-28 02:25:18,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51099 conditions, 6270 events. 3655/6270 cut-off events. For 702220/702227 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43569 event pairs, 1111 based on Foata normal form. 18/6285 useless extension candidates. Maximal degree in co-relation 50952. Up to 5414 conditions per place. [2024-06-28 02:25:18,047 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 54 changer transitions 0/485 dead transitions. [2024-06-28 02:25:18,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 485 transitions, 8757 flow [2024-06-28 02:25:18,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-28 02:25:18,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-28 02:25:18,048 INFO L175 Difference]: Start difference. First operand has 314 places, 457 transitions, 7466 flow. Second operand 8 states and 184 transitions. [2024-06-28 02:25:18,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 485 transitions, 8757 flow [2024-06-28 02:25:20,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 485 transitions, 8667 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-28 02:25:20,937 INFO L231 Difference]: Finished difference. Result has 317 places, 462 transitions, 7607 flow [2024-06-28 02:25:20,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7607, PETRI_PLACES=317, PETRI_TRANSITIONS=462} [2024-06-28 02:25:20,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-28 02:25:20,938 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 462 transitions, 7607 flow [2024-06-28 02:25:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-28 02:25:20,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:20,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:20,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 02:25:20,938 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)] === [2024-06-28 02:25:20,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:20,939 INFO L85 PathProgramCache]: Analyzing trace with hash -870097082, now seen corresponding path program 1 times [2024-06-28 02:25:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055429141] [2024-06-28 02:25:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:21,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:21,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055429141] [2024-06-28 02:25:21,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055429141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:21,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:21,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:25:21,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305984666] [2024-06-28 02:25:21,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:21,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:25:21,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:21,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:25:21,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:25:21,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 462 transitions, 7607 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-28 02:25:21,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:21,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:21,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:22,198 INFO L124 PetriNetUnfolderBase]: 3629/6232 cut-off events. [2024-06-28 02:25:22,199 INFO L125 PetriNetUnfolderBase]: For 683997/684004 co-relation queries the response was YES. [2024-06-28 02:25:22,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50305 conditions, 6232 events. 3629/6232 cut-off events. For 683997/684004 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43234 event pairs, 1097 based on Foata normal form. 18/6247 useless extension candidates. Maximal degree in co-relation 50156. Up to 5402 conditions per place. [2024-06-28 02:25:22,281 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 424 selfloop transitions, 53 changer transitions 0/484 dead transitions. [2024-06-28 02:25:22,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 484 transitions, 8653 flow [2024-06-28 02:25:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 02:25:22,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-28 02:25:22,283 INFO L175 Difference]: Start difference. First operand has 317 places, 462 transitions, 7607 flow. Second operand 8 states and 183 transitions. [2024-06-28 02:25:22,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 484 transitions, 8653 flow [2024-06-28 02:25:25,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 484 transitions, 8546 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-28 02:25:25,367 INFO L231 Difference]: Finished difference. Result has 322 places, 462 transitions, 7611 flow [2024-06-28 02:25:25,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7500, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7611, PETRI_PLACES=322, PETRI_TRANSITIONS=462} [2024-06-28 02:25:25,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-28 02:25:25,367 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 462 transitions, 7611 flow [2024-06-28 02:25:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-28 02:25:25,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:25,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:25,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 02:25:25,368 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)] === [2024-06-28 02:25:25,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1180926412, now seen corresponding path program 5 times [2024-06-28 02:25:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:25,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812327719] [2024-06-28 02:25:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:25,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:25,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:25,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812327719] [2024-06-28 02:25:25,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812327719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:25,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:25,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 02:25:25,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120854539] [2024-06-28 02:25:25,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:25,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 02:25:25,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 02:25:25,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 02:25:25,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:25,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 462 transitions, 7611 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-28 02:25:25,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:25,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:25,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:26,656 INFO L124 PetriNetUnfolderBase]: 3656/6287 cut-off events. [2024-06-28 02:25:26,657 INFO L125 PetriNetUnfolderBase]: For 699765/699772 co-relation queries the response was YES. [2024-06-28 02:25:26,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50237 conditions, 6287 events. 3656/6287 cut-off events. For 699765/699772 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43727 event pairs, 1025 based on Foata normal form. 24/6308 useless extension candidates. Maximal degree in co-relation 50086. Up to 4981 conditions per place. [2024-06-28 02:25:26,741 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 377 selfloop transitions, 109 changer transitions 0/493 dead transitions. [2024-06-28 02:25:26,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 493 transitions, 8889 flow [2024-06-28 02:25:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-28 02:25:26,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 02:25:26,743 INFO L175 Difference]: Start difference. First operand has 322 places, 462 transitions, 7611 flow. Second operand 8 states and 192 transitions. [2024-06-28 02:25:26,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 493 transitions, 8889 flow [2024-06-28 02:25:29,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 493 transitions, 8787 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 02:25:29,968 INFO L231 Difference]: Finished difference. Result has 325 places, 464 transitions, 7785 flow [2024-06-28 02:25:29,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7785, PETRI_PLACES=325, PETRI_TRANSITIONS=464} [2024-06-28 02:25:29,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-28 02:25:29,969 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 464 transitions, 7785 flow [2024-06-28 02:25:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 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) [2024-06-28 02:25:29,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:29,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 02:25:29,970 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)] === [2024-06-28 02:25:29,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:29,970 INFO L85 PathProgramCache]: Analyzing trace with hash 641162548, now seen corresponding path program 1 times [2024-06-28 02:25:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031600445] [2024-06-28 02:25:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:30,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031600445] [2024-06-28 02:25:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031600445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:30,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:30,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:25:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219785177] [2024-06-28 02:25:30,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:30,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:25:30,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:25:30,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:25:30,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:30,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 464 transitions, 7785 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:30,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:30,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:30,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:31,286 INFO L124 PetriNetUnfolderBase]: 3653/6280 cut-off events. [2024-06-28 02:25:31,286 INFO L125 PetriNetUnfolderBase]: For 661404/661408 co-relation queries the response was YES. [2024-06-28 02:25:31,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50647 conditions, 6280 events. 3653/6280 cut-off events. For 661404/661408 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 43730 event pairs, 1123 based on Foata normal form. 2/6277 useless extension candidates. Maximal degree in co-relation 50495. Up to 5545 conditions per place. [2024-06-28 02:25:31,369 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 359 selfloop transitions, 118 changer transitions 0/484 dead transitions. [2024-06-28 02:25:31,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 484 transitions, 8825 flow [2024-06-28 02:25:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:25:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:25:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-28 02:25:31,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-28 02:25:31,370 INFO L175 Difference]: Start difference. First operand has 325 places, 464 transitions, 7785 flow. Second operand 8 states and 189 transitions. [2024-06-28 02:25:31,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 484 transitions, 8825 flow [2024-06-28 02:25:34,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 484 transitions, 8661 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 02:25:34,821 INFO L231 Difference]: Finished difference. Result has 328 places, 464 transitions, 7875 flow [2024-06-28 02:25:34,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7875, PETRI_PLACES=328, PETRI_TRANSITIONS=464} [2024-06-28 02:25:34,822 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-28 02:25:34,822 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 464 transitions, 7875 flow [2024-06-28 02:25:34,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:34,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:34,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:34,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 02:25:34,823 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)] === [2024-06-28 02:25:34,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -60534925, now seen corresponding path program 1 times [2024-06-28 02:25:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:34,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556265112] [2024-06-28 02:25:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:34,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:34,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:34,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556265112] [2024-06-28 02:25:34,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556265112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:34,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:34,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:25:34,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297621709] [2024-06-28 02:25:34,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:34,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:25:34,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:25:34,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:25:34,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:34,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 464 transitions, 7875 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:34,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:34,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:34,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:36,152 INFO L124 PetriNetUnfolderBase]: 3674/6314 cut-off events. [2024-06-28 02:25:36,153 INFO L125 PetriNetUnfolderBase]: For 655656/655663 co-relation queries the response was YES. [2024-06-28 02:25:36,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50907 conditions, 6314 events. 3674/6314 cut-off events. For 655656/655663 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44052 event pairs, 1020 based on Foata normal form. 8/6319 useless extension candidates. Maximal degree in co-relation 50754. Up to 5422 conditions per place. [2024-06-28 02:25:36,240 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 365 selfloop transitions, 124 changer transitions 0/496 dead transitions. [2024-06-28 02:25:36,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 496 transitions, 9239 flow [2024-06-28 02:25:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:25:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:25:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-28 02:25:36,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-28 02:25:36,241 INFO L175 Difference]: Start difference. First operand has 328 places, 464 transitions, 7875 flow. Second operand 9 states and 209 transitions. [2024-06-28 02:25:36,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 496 transitions, 9239 flow [2024-06-28 02:25:39,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 496 transitions, 8894 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 02:25:39,179 INFO L231 Difference]: Finished difference. Result has 330 places, 468 transitions, 7927 flow [2024-06-28 02:25:39,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7530, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7927, PETRI_PLACES=330, PETRI_TRANSITIONS=468} [2024-06-28 02:25:39,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-28 02:25:39,180 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 468 transitions, 7927 flow [2024-06-28 02:25:39,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:39,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:39,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 02:25:39,181 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)] === [2024-06-28 02:25:39,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:39,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1086128253, now seen corresponding path program 2 times [2024-06-28 02:25:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407208576] [2024-06-28 02:25:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:39,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407208576] [2024-06-28 02:25:39,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407208576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:39,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:39,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:25:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270216214] [2024-06-28 02:25:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:25:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:25:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:25:39,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:39,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 468 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:39,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:39,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:39,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:40,502 INFO L124 PetriNetUnfolderBase]: 3669/6305 cut-off events. [2024-06-28 02:25:40,502 INFO L125 PetriNetUnfolderBase]: For 664895/664902 co-relation queries the response was YES. [2024-06-28 02:25:40,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50992 conditions, 6305 events. 3669/6305 cut-off events. For 664895/664902 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 43941 event pairs, 1113 based on Foata normal form. 8/6308 useless extension candidates. Maximal degree in co-relation 50838. Up to 5588 conditions per place. [2024-06-28 02:25:40,587 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 374 selfloop transitions, 107 changer transitions 0/488 dead transitions. [2024-06-28 02:25:40,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 488 transitions, 8937 flow [2024-06-28 02:25:40,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:25:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:25:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-28 02:25:40,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-28 02:25:40,589 INFO L175 Difference]: Start difference. First operand has 330 places, 468 transitions, 7927 flow. Second operand 9 states and 201 transitions. [2024-06-28 02:25:40,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 488 transitions, 8937 flow [2024-06-28 02:25:43,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 488 transitions, 8702 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-28 02:25:43,329 INFO L231 Difference]: Finished difference. Result has 333 places, 468 transitions, 7915 flow [2024-06-28 02:25:43,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7692, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7915, PETRI_PLACES=333, PETRI_TRANSITIONS=468} [2024-06-28 02:25:43,330 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-28 02:25:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 468 transitions, 7915 flow [2024-06-28 02:25:43,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:43,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:43,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:43,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 02:25:43,331 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)] === [2024-06-28 02:25:43,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash -233172778, now seen corresponding path program 2 times [2024-06-28 02:25:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:43,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783487397] [2024-06-28 02:25:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:43,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:43,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783487397] [2024-06-28 02:25:43,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783487397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:43,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:43,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:25:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476722062] [2024-06-28 02:25:43,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:43,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:25:43,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:43,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:25:43,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:25:43,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:43,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 468 transitions, 7915 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:43,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:43,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:43,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:44,647 INFO L124 PetriNetUnfolderBase]: 3674/6313 cut-off events. [2024-06-28 02:25:44,648 INFO L125 PetriNetUnfolderBase]: For 662555/662559 co-relation queries the response was YES. [2024-06-28 02:25:44,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51086 conditions, 6313 events. 3674/6313 cut-off events. For 662555/662559 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 43960 event pairs, 1123 based on Foata normal form. 2/6310 useless extension candidates. Maximal degree in co-relation 50931. Up to 5388 conditions per place. [2024-06-28 02:25:44,731 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 310 selfloop transitions, 185 changer transitions 0/502 dead transitions. [2024-06-28 02:25:44,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 502 transitions, 9195 flow [2024-06-28 02:25:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:25:44,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:25:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-28 02:25:44,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-28 02:25:44,732 INFO L175 Difference]: Start difference. First operand has 333 places, 468 transitions, 7915 flow. Second operand 11 states and 252 transitions. [2024-06-28 02:25:44,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 502 transitions, 9195 flow [2024-06-28 02:25:47,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 502 transitions, 8923 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-28 02:25:47,756 INFO L231 Difference]: Finished difference. Result has 335 places, 471 transitions, 8075 flow [2024-06-28 02:25:47,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8075, PETRI_PLACES=335, PETRI_TRANSITIONS=471} [2024-06-28 02:25:47,756 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-28 02:25:47,756 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 471 transitions, 8075 flow [2024-06-28 02:25:47,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:47,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:47,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:47,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-28 02:25:47,757 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)] === [2024-06-28 02:25:47,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:47,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1095389286, now seen corresponding path program 3 times [2024-06-28 02:25:47,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:47,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364156876] [2024-06-28 02:25:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:47,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:47,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:47,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364156876] [2024-06-28 02:25:47,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364156876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:47,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:47,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:25:47,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957830619] [2024-06-28 02:25:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:47,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:25:47,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:25:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:25:47,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:47,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 471 transitions, 8075 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:47,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:47,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:47,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:49,298 INFO L124 PetriNetUnfolderBase]: 3679/6322 cut-off events. [2024-06-28 02:25:49,299 INFO L125 PetriNetUnfolderBase]: For 663074/663078 co-relation queries the response was YES. [2024-06-28 02:25:49,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51287 conditions, 6322 events. 3679/6322 cut-off events. For 663074/663078 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 44021 event pairs, 1123 based on Foata normal form. 2/6319 useless extension candidates. Maximal degree in co-relation 51132. Up to 5394 conditions per place. [2024-06-28 02:25:49,373 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 296 selfloop transitions, 195 changer transitions 0/498 dead transitions. [2024-06-28 02:25:49,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 498 transitions, 9335 flow [2024-06-28 02:25:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:25:49,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:25:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-28 02:25:49,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-28 02:25:49,374 INFO L175 Difference]: Start difference. First operand has 335 places, 471 transitions, 8075 flow. Second operand 10 states and 227 transitions. [2024-06-28 02:25:49,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 498 transitions, 9335 flow [2024-06-28 02:25:52,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 498 transitions, 8935 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-28 02:25:52,062 INFO L231 Difference]: Finished difference. Result has 336 places, 474 transitions, 8131 flow [2024-06-28 02:25:52,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7681, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=336, PETRI_TRANSITIONS=474} [2024-06-28 02:25:52,062 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-28 02:25:52,062 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 474 transitions, 8131 flow [2024-06-28 02:25:52,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:52,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:52,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-28 02:25:52,063 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)] === [2024-06-28 02:25:52,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:52,063 INFO L85 PathProgramCache]: Analyzing trace with hash -57684568, now seen corresponding path program 4 times [2024-06-28 02:25:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:52,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193030541] [2024-06-28 02:25:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:52,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:52,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193030541] [2024-06-28 02:25:52,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193030541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:52,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:52,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:25:52,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096267408] [2024-06-28 02:25:52,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:52,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:25:52,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:25:52,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:25:52,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:52,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 474 transitions, 8131 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:52,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:52,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:52,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:53,473 INFO L124 PetriNetUnfolderBase]: 3684/6327 cut-off events. [2024-06-28 02:25:53,473 INFO L125 PetriNetUnfolderBase]: For 678888/678892 co-relation queries the response was YES. [2024-06-28 02:25:53,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51530 conditions, 6327 events. 3684/6327 cut-off events. For 678888/678892 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44125 event pairs, 1121 based on Foata normal form. 2/6324 useless extension candidates. Maximal degree in co-relation 51374. Up to 5400 conditions per place. [2024-06-28 02:25:53,564 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 199 changer transitions 0/500 dead transitions. [2024-06-28 02:25:53,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 500 transitions, 9393 flow [2024-06-28 02:25:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:25:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:25:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-28 02:25:53,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-28 02:25:53,566 INFO L175 Difference]: Start difference. First operand has 336 places, 474 transitions, 8131 flow. Second operand 12 states and 263 transitions. [2024-06-28 02:25:53,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 500 transitions, 9393 flow [2024-06-28 02:25:56,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 500 transitions, 8973 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 02:25:56,798 INFO L231 Difference]: Finished difference. Result has 340 places, 477 transitions, 8175 flow [2024-06-28 02:25:56,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7717, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8175, PETRI_PLACES=340, PETRI_TRANSITIONS=477} [2024-06-28 02:25:56,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-28 02:25:56,798 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 477 transitions, 8175 flow [2024-06-28 02:25:56,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:56,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:25:56,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:25:56,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-28 02:25:56,799 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)] === [2024-06-28 02:25:56,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:25:56,799 INFO L85 PathProgramCache]: Analyzing trace with hash -57673408, now seen corresponding path program 5 times [2024-06-28 02:25:56,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:25:56,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966126144] [2024-06-28 02:25:56,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:25:56,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:25:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:25:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:25:56,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:25:56,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966126144] [2024-06-28 02:25:56,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966126144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:25:56,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:25:56,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:25:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844031540] [2024-06-28 02:25:56,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:25:56,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:25:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:25:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:25:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:25:56,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:25:56,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 477 transitions, 8175 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:25:56,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:25:56,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:25:56,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:25:58,112 INFO L124 PetriNetUnfolderBase]: 3681/6327 cut-off events. [2024-06-28 02:25:58,112 INFO L125 PetriNetUnfolderBase]: For 690585/690589 co-relation queries the response was YES. [2024-06-28 02:25:58,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51590 conditions, 6327 events. 3681/6327 cut-off events. For 690585/690589 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44154 event pairs, 1123 based on Foata normal form. 2/6324 useless extension candidates. Maximal degree in co-relation 51433. Up to 5397 conditions per place. [2024-06-28 02:25:58,200 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 197 changer transitions 0/497 dead transitions. [2024-06-28 02:25:58,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 497 transitions, 9203 flow [2024-06-28 02:25:58,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:25:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:25:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-28 02:25:58,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-06-28 02:25:58,201 INFO L175 Difference]: Start difference. First operand has 340 places, 477 transitions, 8175 flow. Second operand 10 states and 226 transitions. [2024-06-28 02:25:58,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 497 transitions, 9203 flow [2024-06-28 02:26:01,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 497 transitions, 8612 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-28 02:26:01,686 INFO L231 Difference]: Finished difference. Result has 339 places, 477 transitions, 7985 flow [2024-06-28 02:26:01,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7985, PETRI_PLACES=339, PETRI_TRANSITIONS=477} [2024-06-28 02:26:01,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 298 predicate places. [2024-06-28 02:26:01,687 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 477 transitions, 7985 flow [2024-06-28 02:26:01,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:01,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:01,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:01,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-28 02:26:01,687 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)] === [2024-06-28 02:26:01,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1883196275, now seen corresponding path program 3 times [2024-06-28 02:26:01,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:01,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698696374] [2024-06-28 02:26:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:01,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:01,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698696374] [2024-06-28 02:26:01,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698696374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:01,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:01,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:26:01,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612349646] [2024-06-28 02:26:01,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:01,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:26:01,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:26:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:26:01,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:01,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 477 transitions, 7985 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:01,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:01,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:01,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:02,998 INFO L124 PetriNetUnfolderBase]: 3748/6422 cut-off events. [2024-06-28 02:26:02,999 INFO L125 PetriNetUnfolderBase]: For 747181/747188 co-relation queries the response was YES. [2024-06-28 02:26:03,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53304 conditions, 6422 events. 3748/6422 cut-off events. For 747181/747188 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 44841 event pairs, 1124 based on Foata normal form. 8/6427 useless extension candidates. Maximal degree in co-relation 53146. Up to 5550 conditions per place. [2024-06-28 02:26:03,088 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 346 selfloop transitions, 158 changer transitions 0/511 dead transitions. [2024-06-28 02:26:03,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 511 transitions, 9401 flow [2024-06-28 02:26:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:26:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:26:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-28 02:26:03,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-06-28 02:26:03,089 INFO L175 Difference]: Start difference. First operand has 339 places, 477 transitions, 7985 flow. Second operand 8 states and 194 transitions. [2024-06-28 02:26:03,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 511 transitions, 9401 flow [2024-06-28 02:26:06,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 511 transitions, 9007 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-28 02:26:06,060 INFO L231 Difference]: Finished difference. Result has 338 places, 481 transitions, 8060 flow [2024-06-28 02:26:06,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7591, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8060, PETRI_PLACES=338, PETRI_TRANSITIONS=481} [2024-06-28 02:26:06,061 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-28 02:26:06,061 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 481 transitions, 8060 flow [2024-06-28 02:26:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:06,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:06,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:06,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-28 02:26:06,062 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)] === [2024-06-28 02:26:06,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:06,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1387804547, now seen corresponding path program 4 times [2024-06-28 02:26:06,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:06,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760325941] [2024-06-28 02:26:06,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:06,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760325941] [2024-06-28 02:26:06,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760325941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:06,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:26:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820907200] [2024-06-28 02:26:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:06,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:26:06,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:06,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:26:06,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:26:06,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:06,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 481 transitions, 8060 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:06,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:06,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:06,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:07,465 INFO L124 PetriNetUnfolderBase]: 3756/6439 cut-off events. [2024-06-28 02:26:07,466 INFO L125 PetriNetUnfolderBase]: For 765406/765413 co-relation queries the response was YES. [2024-06-28 02:26:07,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53694 conditions, 6439 events. 3756/6439 cut-off events. For 765406/765413 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44961 event pairs, 1131 based on Foata normal form. 8/6444 useless extension candidates. Maximal degree in co-relation 53535. Up to 5651 conditions per place. [2024-06-28 02:26:07,554 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 343 selfloop transitions, 155 changer transitions 0/505 dead transitions. [2024-06-28 02:26:07,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 505 transitions, 9186 flow [2024-06-28 02:26:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:26:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:26:07,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-28 02:26:07,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 02:26:07,556 INFO L175 Difference]: Start difference. First operand has 338 places, 481 transitions, 8060 flow. Second operand 8 states and 186 transitions. [2024-06-28 02:26:07,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 505 transitions, 9186 flow [2024-06-28 02:26:10,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 505 transitions, 8898 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-28 02:26:10,829 INFO L231 Difference]: Finished difference. Result has 342 places, 483 transitions, 8167 flow [2024-06-28 02:26:10,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8167, PETRI_PLACES=342, PETRI_TRANSITIONS=483} [2024-06-28 02:26:10,829 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-28 02:26:10,829 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 483 transitions, 8167 flow [2024-06-28 02:26:10,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:10,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:10,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-28 02:26:10,830 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)] === [2024-06-28 02:26:10,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1031628675, now seen corresponding path program 5 times [2024-06-28 02:26:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:10,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503565434] [2024-06-28 02:26:10,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:10,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:10,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:10,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503565434] [2024-06-28 02:26:10,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503565434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:10,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:10,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:26:10,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448518928] [2024-06-28 02:26:10,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:10,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:26:10,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:10,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:26:10,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:26:10,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:10,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 483 transitions, 8167 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:10,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:10,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:10,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:12,169 INFO L124 PetriNetUnfolderBase]: 3856/6591 cut-off events. [2024-06-28 02:26:12,169 INFO L125 PetriNetUnfolderBase]: For 840801/840808 co-relation queries the response was YES. [2024-06-28 02:26:12,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56462 conditions, 6591 events. 3856/6591 cut-off events. For 840801/840808 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 46069 event pairs, 1033 based on Foata normal form. 8/6596 useless extension candidates. Maximal degree in co-relation 56301. Up to 5332 conditions per place. [2024-06-28 02:26:12,261 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 333 selfloop transitions, 183 changer transitions 0/523 dead transitions. [2024-06-28 02:26:12,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 523 transitions, 9849 flow [2024-06-28 02:26:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:26:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:26:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-28 02:26:12,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-28 02:26:12,262 INFO L175 Difference]: Start difference. First operand has 342 places, 483 transitions, 8167 flow. Second operand 8 states and 198 transitions. [2024-06-28 02:26:12,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 523 transitions, 9849 flow [2024-06-28 02:26:16,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 523 transitions, 9488 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 02:26:16,515 INFO L231 Difference]: Finished difference. Result has 344 places, 488 transitions, 8357 flow [2024-06-28 02:26:16,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7806, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8357, PETRI_PLACES=344, PETRI_TRANSITIONS=488} [2024-06-28 02:26:16,516 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 303 predicate places. [2024-06-28 02:26:16,516 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 488 transitions, 8357 flow [2024-06-28 02:26:16,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:16,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:16,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:16,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-28 02:26:16,517 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)] === [2024-06-28 02:26:16,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:16,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1541305203, now seen corresponding path program 6 times [2024-06-28 02:26:16,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:16,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633139092] [2024-06-28 02:26:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:16,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:16,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:16,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:16,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633139092] [2024-06-28 02:26:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633139092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:16,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:16,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:26:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233361066] [2024-06-28 02:26:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:16,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:26:16,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:26:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:26:16,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:16,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 488 transitions, 8357 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:16,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:16,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:16,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:17,847 INFO L124 PetriNetUnfolderBase]: 3864/6607 cut-off events. [2024-06-28 02:26:17,847 INFO L125 PetriNetUnfolderBase]: For 862369/862376 co-relation queries the response was YES. [2024-06-28 02:26:17,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57079 conditions, 6607 events. 3864/6607 cut-off events. For 862369/862376 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46256 event pairs, 1061 based on Foata normal form. 8/6612 useless extension candidates. Maximal degree in co-relation 56917. Up to 5340 conditions per place. [2024-06-28 02:26:17,941 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 326 selfloop transitions, 185 changer transitions 0/518 dead transitions. [2024-06-28 02:26:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 518 transitions, 9723 flow [2024-06-28 02:26:17,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:26:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:26:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-28 02:26:17,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-28 02:26:17,943 INFO L175 Difference]: Start difference. First operand has 344 places, 488 transitions, 8357 flow. Second operand 8 states and 191 transitions. [2024-06-28 02:26:17,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 518 transitions, 9723 flow [2024-06-28 02:26:21,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 518 transitions, 9423 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-28 02:26:21,478 INFO L231 Difference]: Finished difference. Result has 349 places, 490 transitions, 8512 flow [2024-06-28 02:26:21,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8512, PETRI_PLACES=349, PETRI_TRANSITIONS=490} [2024-06-28 02:26:21,479 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-28 02:26:21,479 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 490 transitions, 8512 flow [2024-06-28 02:26:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:21,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:21,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-28 02:26:21,480 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)] === [2024-06-28 02:26:21,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1255014933, now seen corresponding path program 7 times [2024-06-28 02:26:21,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:21,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173087721] [2024-06-28 02:26:21,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:21,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:21,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173087721] [2024-06-28 02:26:21,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173087721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:21,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:21,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:26:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719262202] [2024-06-28 02:26:21,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:21,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:26:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:26:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:26:21,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:21,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 490 transitions, 8512 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:21,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:21,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:22,898 INFO L124 PetriNetUnfolderBase]: 3872/6619 cut-off events. [2024-06-28 02:26:22,898 INFO L125 PetriNetUnfolderBase]: For 878607/878614 co-relation queries the response was YES. [2024-06-28 02:26:22,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57561 conditions, 6619 events. 3872/6619 cut-off events. For 878607/878614 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 46322 event pairs, 1173 based on Foata normal form. 8/6624 useless extension candidates. Maximal degree in co-relation 57397. Up to 5827 conditions per place. [2024-06-28 02:26:22,995 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 349 selfloop transitions, 155 changer transitions 0/511 dead transitions. [2024-06-28 02:26:22,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 511 transitions, 9640 flow [2024-06-28 02:26:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:26:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:26:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-28 02:26:22,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-28 02:26:22,997 INFO L175 Difference]: Start difference. First operand has 349 places, 490 transitions, 8512 flow. Second operand 8 states and 182 transitions. [2024-06-28 02:26:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 511 transitions, 9640 flow [2024-06-28 02:26:27,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 511 transitions, 9273 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-28 02:26:27,802 INFO L231 Difference]: Finished difference. Result has 352 places, 492 transitions, 8538 flow [2024-06-28 02:26:27,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8147, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8538, PETRI_PLACES=352, PETRI_TRANSITIONS=492} [2024-06-28 02:26:27,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-28 02:26:27,802 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 492 transitions, 8538 flow [2024-06-28 02:26:27,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:27,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:27,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:27,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-28 02:26:27,803 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)] === [2024-06-28 02:26:27,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash -506372221, now seen corresponding path program 8 times [2024-06-28 02:26:27,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:27,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247776628] [2024-06-28 02:26:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:27,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:27,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:27,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247776628] [2024-06-28 02:26:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247776628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:27,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:27,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:26:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997357116] [2024-06-28 02:26:27,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:27,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:26:27,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:26:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:26:27,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:27,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 492 transitions, 8538 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:27,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:27,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:27,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:29,178 INFO L124 PetriNetUnfolderBase]: 3880/6629 cut-off events. [2024-06-28 02:26:29,179 INFO L125 PetriNetUnfolderBase]: For 898003/898010 co-relation queries the response was YES. [2024-06-28 02:26:29,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57699 conditions, 6629 events. 3880/6629 cut-off events. For 898003/898010 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46464 event pairs, 1171 based on Foata normal form. 8/6632 useless extension candidates. Maximal degree in co-relation 57534. Up to 5811 conditions per place. [2024-06-28 02:26:29,272 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 345 selfloop transitions, 162 changer transitions 0/514 dead transitions. [2024-06-28 02:26:29,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 514 transitions, 9664 flow [2024-06-28 02:26:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 02:26:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 02:26:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-28 02:26:29,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-28 02:26:29,273 INFO L175 Difference]: Start difference. First operand has 352 places, 492 transitions, 8538 flow. Second operand 8 states and 183 transitions. [2024-06-28 02:26:29,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 514 transitions, 9664 flow [2024-06-28 02:26:34,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 514 transitions, 9299 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-28 02:26:34,064 INFO L231 Difference]: Finished difference. Result has 354 places, 494 transitions, 8570 flow [2024-06-28 02:26:34,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8173, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8570, PETRI_PLACES=354, PETRI_TRANSITIONS=494} [2024-06-28 02:26:34,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-28 02:26:34,064 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 494 transitions, 8570 flow [2024-06-28 02:26:34,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:34,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:34,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:34,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-28 02:26:34,065 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)] === [2024-06-28 02:26:34,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1378543514, now seen corresponding path program 6 times [2024-06-28 02:26:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541367415] [2024-06-28 02:26:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:34,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:34,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541367415] [2024-06-28 02:26:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541367415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:34,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:26:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052771400] [2024-06-28 02:26:34,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:26:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:26:34,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:26:34,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:34,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 494 transitions, 8570 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:34,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:34,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:34,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:35,522 INFO L124 PetriNetUnfolderBase]: 3885/6633 cut-off events. [2024-06-28 02:26:35,523 INFO L125 PetriNetUnfolderBase]: For 912712/912716 co-relation queries the response was YES. [2024-06-28 02:26:35,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57950 conditions, 6633 events. 3885/6633 cut-off events. For 912712/912716 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46344 event pairs, 1184 based on Foata normal form. 2/6630 useless extension candidates. Maximal degree in co-relation 57784. Up to 5527 conditions per place. [2024-06-28 02:26:35,621 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 279 changer transitions 0/524 dead transitions. [2024-06-28 02:26:35,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 524 transitions, 10092 flow [2024-06-28 02:26:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:26:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:26:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-28 02:26:35,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-28 02:26:35,622 INFO L175 Difference]: Start difference. First operand has 354 places, 494 transitions, 8570 flow. Second operand 9 states and 214 transitions. [2024-06-28 02:26:35,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 524 transitions, 10092 flow [2024-06-28 02:26:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 524 transitions, 9717 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-28 02:26:40,325 INFO L231 Difference]: Finished difference. Result has 357 places, 497 transitions, 8825 flow [2024-06-28 02:26:40,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8195, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8825, PETRI_PLACES=357, PETRI_TRANSITIONS=497} [2024-06-28 02:26:40,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 316 predicate places. [2024-06-28 02:26:40,326 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 497 transitions, 8825 flow [2024-06-28 02:26:40,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:40,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:40,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:40,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-28 02:26:40,327 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)] === [2024-06-28 02:26:40,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:40,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1387809104, now seen corresponding path program 7 times [2024-06-28 02:26:40,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:40,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566495701] [2024-06-28 02:26:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:40,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:40,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:40,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566495701] [2024-06-28 02:26:40,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566495701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:40,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:40,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:26:40,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88061545] [2024-06-28 02:26:40,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:40,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:26:40,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:26:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:26:40,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:40,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 497 transitions, 8825 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:40,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:40,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:40,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:41,910 INFO L124 PetriNetUnfolderBase]: 3898/6659 cut-off events. [2024-06-28 02:26:41,910 INFO L125 PetriNetUnfolderBase]: For 937185/937189 co-relation queries the response was YES. [2024-06-28 02:26:42,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58670 conditions, 6659 events. 3898/6659 cut-off events. For 937185/937189 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46660 event pairs, 1186 based on Foata normal form. 2/6656 useless extension candidates. Maximal degree in co-relation 58503. Up to 5542 conditions per place. [2024-06-28 02:26:42,180 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 282 changer transitions 0/528 dead transitions. [2024-06-28 02:26:42,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 528 transitions, 10611 flow [2024-06-28 02:26:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:26:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:26:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-28 02:26:42,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-28 02:26:42,181 INFO L175 Difference]: Start difference. First operand has 357 places, 497 transitions, 8825 flow. Second operand 9 states and 213 transitions. [2024-06-28 02:26:42,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 528 transitions, 10611 flow [2024-06-28 02:26:46,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 528 transitions, 9808 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-28 02:26:46,614 INFO L231 Difference]: Finished difference. Result has 358 places, 503 transitions, 8736 flow [2024-06-28 02:26:46,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8736, PETRI_PLACES=358, PETRI_TRANSITIONS=503} [2024-06-28 02:26:46,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 317 predicate places. [2024-06-28 02:26:46,614 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 503 transitions, 8736 flow [2024-06-28 02:26:46,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:46,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:46,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:46,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-28 02:26:46,615 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)] === [2024-06-28 02:26:46,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1387797944, now seen corresponding path program 8 times [2024-06-28 02:26:46,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:46,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976015014] [2024-06-28 02:26:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:46,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:46,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976015014] [2024-06-28 02:26:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976015014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:46,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:46,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:26:46,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283416113] [2024-06-28 02:26:46,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:46,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:26:46,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:46,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:26:46,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:26:46,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:46,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 503 transitions, 8736 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:46,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:46,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:46,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:48,236 INFO L124 PetriNetUnfolderBase]: 3895/6651 cut-off events. [2024-06-28 02:26:48,236 INFO L125 PetriNetUnfolderBase]: For 951305/951309 co-relation queries the response was YES. [2024-06-28 02:26:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58609 conditions, 6651 events. 3895/6651 cut-off events. For 951305/951309 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46573 event pairs, 1184 based on Foata normal form. 2/6648 useless extension candidates. Maximal degree in co-relation 58441. Up to 5539 conditions per place. [2024-06-28 02:26:48,324 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 239 selfloop transitions, 283 changer transitions 0/529 dead transitions. [2024-06-28 02:26:48,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 529 transitions, 10206 flow [2024-06-28 02:26:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:26:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:26:48,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-28 02:26:48,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-06-28 02:26:48,325 INFO L175 Difference]: Start difference. First operand has 358 places, 503 transitions, 8736 flow. Second operand 11 states and 248 transitions. [2024-06-28 02:26:48,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 529 transitions, 10206 flow [2024-06-28 02:26:52,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 529 transitions, 9737 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 02:26:52,563 INFO L231 Difference]: Finished difference. Result has 364 places, 503 transitions, 8839 flow [2024-06-28 02:26:52,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8267, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8839, PETRI_PLACES=364, PETRI_TRANSITIONS=503} [2024-06-28 02:26:52,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-28 02:26:52,564 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 503 transitions, 8839 flow [2024-06-28 02:26:52,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:52,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:52,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-28 02:26:52,564 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)] === [2024-06-28 02:26:52,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash -502051534, now seen corresponding path program 9 times [2024-06-28 02:26:52,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:52,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750913941] [2024-06-28 02:26:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:52,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:52,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:52,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750913941] [2024-06-28 02:26:52,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750913941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:52,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:52,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:26:52,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214051713] [2024-06-28 02:26:52,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:52,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:26:52,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:52,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:26:52,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:26:52,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:52,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 503 transitions, 8839 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:52,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:52,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:52,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:26:54,135 INFO L124 PetriNetUnfolderBase]: 3900/6660 cut-off events. [2024-06-28 02:26:54,135 INFO L125 PetriNetUnfolderBase]: For 973020/973024 co-relation queries the response was YES. [2024-06-28 02:26:54,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58920 conditions, 6660 events. 3900/6660 cut-off events. For 973020/973024 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46668 event pairs, 1184 based on Foata normal form. 2/6657 useless extension candidates. Maximal degree in co-relation 58751. Up to 5545 conditions per place. [2024-06-28 02:26:54,225 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 288 changer transitions 0/528 dead transitions. [2024-06-28 02:26:54,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 528 transitions, 10557 flow [2024-06-28 02:26:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:26:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:26:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-28 02:26:54,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-28 02:26:54,226 INFO L175 Difference]: Start difference. First operand has 364 places, 503 transitions, 8839 flow. Second operand 9 states and 209 transitions. [2024-06-28 02:26:54,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 528 transitions, 10557 flow [2024-06-28 02:26:59,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 528 transitions, 9789 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 02:26:59,835 INFO L231 Difference]: Finished difference. Result has 362 places, 506 transitions, 8725 flow [2024-06-28 02:26:59,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8725, PETRI_PLACES=362, PETRI_TRANSITIONS=506} [2024-06-28 02:26:59,836 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 321 predicate places. [2024-06-28 02:26:59,836 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 506 transitions, 8725 flow [2024-06-28 02:26:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:59,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:26:59,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:26:59,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-28 02:26:59,837 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)] === [2024-06-28 02:26:59,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:26:59,837 INFO L85 PathProgramCache]: Analyzing trace with hash -514938544, now seen corresponding path program 10 times [2024-06-28 02:26:59,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:26:59,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795327601] [2024-06-28 02:26:59,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:26:59,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:26:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:26:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:26:59,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:26:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795327601] [2024-06-28 02:26:59,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795327601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:26:59,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:26:59,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:26:59,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868147391] [2024-06-28 02:26:59,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:26:59,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:26:59,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:26:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:26:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:26:59,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:26:59,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 506 transitions, 8725 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:26:59,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:26:59,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:26:59,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:01,409 INFO L124 PetriNetUnfolderBase]: 3905/6669 cut-off events. [2024-06-28 02:27:01,410 INFO L125 PetriNetUnfolderBase]: For 991405/991409 co-relation queries the response was YES. [2024-06-28 02:27:01,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59128 conditions, 6669 events. 3905/6669 cut-off events. For 991405/991409 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 46717 event pairs, 1184 based on Foata normal form. 2/6666 useless extension candidates. Maximal degree in co-relation 58958. Up to 5551 conditions per place. [2024-06-28 02:27:01,502 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 291 changer transitions 0/531 dead transitions. [2024-06-28 02:27:01,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 531 transitions, 10452 flow [2024-06-28 02:27:01,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:27:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:27:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-28 02:27:01,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-28 02:27:01,503 INFO L175 Difference]: Start difference. First operand has 362 places, 506 transitions, 8725 flow. Second operand 9 states and 209 transitions. [2024-06-28 02:27:01,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 531 transitions, 10452 flow [2024-06-28 02:27:06,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 531 transitions, 9692 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-28 02:27:06,554 INFO L231 Difference]: Finished difference. Result has 364 places, 509 transitions, 8622 flow [2024-06-28 02:27:06,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8622, PETRI_PLACES=364, PETRI_TRANSITIONS=509} [2024-06-28 02:27:06,554 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-28 02:27:06,554 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 509 transitions, 8622 flow [2024-06-28 02:27:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:06,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:06,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-28 02:27:06,555 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)] === [2024-06-28 02:27:06,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:06,555 INFO L85 PathProgramCache]: Analyzing trace with hash -514949704, now seen corresponding path program 11 times [2024-06-28 02:27:06,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:06,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704172367] [2024-06-28 02:27:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:06,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:06,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704172367] [2024-06-28 02:27:06,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704172367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:06,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:06,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:27:06,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977936066] [2024-06-28 02:27:06,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:06,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:27:06,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:06,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:27:06,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:27:06,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:06,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 509 transitions, 8622 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:06,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:06,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:06,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:08,215 INFO L124 PetriNetUnfolderBase]: 3902/6665 cut-off events. [2024-06-28 02:27:08,216 INFO L125 PetriNetUnfolderBase]: For 1006793/1006797 co-relation queries the response was YES. [2024-06-28 02:27:08,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58724 conditions, 6665 events. 3902/6665 cut-off events. For 1006793/1006797 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 46741 event pairs, 1184 based on Foata normal form. 2/6662 useless extension candidates. Maximal degree in co-relation 58554. Up to 5548 conditions per place. [2024-06-28 02:27:08,305 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 233 selfloop transitions, 292 changer transitions 0/532 dead transitions. [2024-06-28 02:27:08,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 532 transitions, 10102 flow [2024-06-28 02:27:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 02:27:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 02:27:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-28 02:27:08,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-28 02:27:08,307 INFO L175 Difference]: Start difference. First operand has 364 places, 509 transitions, 8622 flow. Second operand 11 states and 242 transitions. [2024-06-28 02:27:08,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 532 transitions, 10102 flow [2024-06-28 02:27:13,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 532 transitions, 9242 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-28 02:27:13,853 INFO L231 Difference]: Finished difference. Result has 367 places, 509 transitions, 8352 flow [2024-06-28 02:27:13,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8352, PETRI_PLACES=367, PETRI_TRANSITIONS=509} [2024-06-28 02:27:13,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-28 02:27:13,853 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 509 transitions, 8352 flow [2024-06-28 02:27:13,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:13,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:13,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-28 02:27:13,855 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)] === [2024-06-28 02:27:13,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1389278427, now seen corresponding path program 9 times [2024-06-28 02:27:13,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:13,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474787314] [2024-06-28 02:27:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:13,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:13,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474787314] [2024-06-28 02:27:13,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474787314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:13,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:13,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:27:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628713982] [2024-06-28 02:27:13,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:27:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:27:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:27:14,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:14,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 509 transitions, 8352 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:14,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:14,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:14,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:15,453 INFO L124 PetriNetUnfolderBase]: 3938/6728 cut-off events. [2024-06-28 02:27:15,453 INFO L125 PetriNetUnfolderBase]: For 1067794/1067801 co-relation queries the response was YES. [2024-06-28 02:27:15,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59275 conditions, 6728 events. 3938/6728 cut-off events. For 1067794/1067801 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47260 event pairs, 1176 based on Foata normal form. 16/6741 useless extension candidates. Maximal degree in co-relation 59104. Up to 6040 conditions per place. [2024-06-28 02:27:15,542 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 461 selfloop transitions, 63 changer transitions 0/531 dead transitions. [2024-06-28 02:27:15,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 531 transitions, 9548 flow [2024-06-28 02:27:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:27:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:27:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-28 02:27:15,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-28 02:27:15,543 INFO L175 Difference]: Start difference. First operand has 367 places, 509 transitions, 8352 flow. Second operand 9 states and 199 transitions. [2024-06-28 02:27:15,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 531 transitions, 9548 flow [2024-06-28 02:27:20,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 531 transitions, 8956 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-28 02:27:20,493 INFO L231 Difference]: Finished difference. Result has 366 places, 511 transitions, 7972 flow [2024-06-28 02:27:20,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7972, PETRI_PLACES=366, PETRI_TRANSITIONS=511} [2024-06-28 02:27:20,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-28 02:27:20,494 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 511 transitions, 7972 flow [2024-06-28 02:27:20,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:20,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:20,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-28 02:27:20,494 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)] === [2024-06-28 02:27:20,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1380707547, now seen corresponding path program 10 times [2024-06-28 02:27:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:20,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8292317] [2024-06-28 02:27:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:20,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:20,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:20,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8292317] [2024-06-28 02:27:20,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8292317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:20,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:20,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:27:20,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267926876] [2024-06-28 02:27:20,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:20,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:27:20,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:27:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:27:20,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:20,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 511 transitions, 7972 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:20,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:20,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:20,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:22,235 INFO L124 PetriNetUnfolderBase]: 4020/6844 cut-off events. [2024-06-28 02:27:22,235 INFO L125 PetriNetUnfolderBase]: For 1127089/1127096 co-relation queries the response was YES. [2024-06-28 02:27:22,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60709 conditions, 6844 events. 4020/6844 cut-off events. For 1127089/1127096 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 48076 event pairs, 1180 based on Foata normal form. 16/6853 useless extension candidates. Maximal degree in co-relation 60537. Up to 6018 conditions per place. [2024-06-28 02:27:22,324 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 463 selfloop transitions, 69 changer transitions 0/539 dead transitions. [2024-06-28 02:27:22,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 539 transitions, 9431 flow [2024-06-28 02:27:22,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:27:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:27:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-28 02:27:22,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-28 02:27:22,325 INFO L175 Difference]: Start difference. First operand has 366 places, 511 transitions, 7972 flow. Second operand 9 states and 203 transitions. [2024-06-28 02:27:22,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 539 transitions, 9431 flow [2024-06-28 02:27:26,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 539 transitions, 9259 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-28 02:27:26,504 INFO L231 Difference]: Finished difference. Result has 369 places, 514 transitions, 8059 flow [2024-06-28 02:27:26,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7800, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8059, PETRI_PLACES=369, PETRI_TRANSITIONS=514} [2024-06-28 02:27:26,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-28 02:27:26,505 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 514 transitions, 8059 flow [2024-06-28 02:27:26,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:26,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:26,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:26,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-28 02:27:26,505 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)] === [2024-06-28 02:27:26,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:26,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1203687999, now seen corresponding path program 1 times [2024-06-28 02:27:26,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:26,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781319438] [2024-06-28 02:27:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:26,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:26,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781319438] [2024-06-28 02:27:26,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781319438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:26,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:26,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:27:26,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554248573] [2024-06-28 02:27:26,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:26,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:27:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:27:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:27:26,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:26,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 514 transitions, 8059 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:26,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:26,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:26,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:28,224 INFO L124 PetriNetUnfolderBase]: 4056/6906 cut-off events. [2024-06-28 02:27:28,224 INFO L125 PetriNetUnfolderBase]: For 1149887/1149894 co-relation queries the response was YES. [2024-06-28 02:27:28,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61393 conditions, 6906 events. 4056/6906 cut-off events. For 1149887/1149894 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48584 event pairs, 1210 based on Foata normal form. 16/6919 useless extension candidates. Maximal degree in co-relation 61219. Up to 6222 conditions per place. [2024-06-28 02:27:28,319 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 466 selfloop transitions, 63 changer transitions 0/536 dead transitions. [2024-06-28 02:27:28,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 536 transitions, 9231 flow [2024-06-28 02:27:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:27:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:27:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-28 02:27:28,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-28 02:27:28,320 INFO L175 Difference]: Start difference. First operand has 369 places, 514 transitions, 8059 flow. Second operand 9 states and 199 transitions. [2024-06-28 02:27:28,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 536 transitions, 9231 flow [2024-06-28 02:27:32,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 536 transitions, 9063 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-28 02:27:32,785 INFO L231 Difference]: Finished difference. Result has 372 places, 516 transitions, 8069 flow [2024-06-28 02:27:32,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8069, PETRI_PLACES=372, PETRI_TRANSITIONS=516} [2024-06-28 02:27:32,785 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-28 02:27:32,785 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 516 transitions, 8069 flow [2024-06-28 02:27:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:32,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:32,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:32,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-28 02:27:32,786 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)] === [2024-06-28 02:27:32,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:32,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1203212769, now seen corresponding path program 2 times [2024-06-28 02:27:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:32,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896838273] [2024-06-28 02:27:32,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:32,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:32,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:32,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:32,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896838273] [2024-06-28 02:27:32,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896838273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:32,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:32,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:27:32,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726451194] [2024-06-28 02:27:32,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:32,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:27:32,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:32,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:27:32,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:27:32,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:33,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 516 transitions, 8069 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:33,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:33,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:33,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:34,631 INFO L124 PetriNetUnfolderBase]: 4138/7028 cut-off events. [2024-06-28 02:27:34,631 INFO L125 PetriNetUnfolderBase]: For 1212429/1212436 co-relation queries the response was YES. [2024-06-28 02:27:34,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63166 conditions, 7028 events. 4138/7028 cut-off events. For 1212429/1212436 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 49533 event pairs, 1216 based on Foata normal form. 16/7041 useless extension candidates. Maximal degree in co-relation 62991. Up to 6164 conditions per place. [2024-06-28 02:27:34,729 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 469 selfloop transitions, 68 changer transitions 0/544 dead transitions. [2024-06-28 02:27:34,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 544 transitions, 9517 flow [2024-06-28 02:27:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:27:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:27:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-28 02:27:34,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-28 02:27:34,731 INFO L175 Difference]: Start difference. First operand has 372 places, 516 transitions, 8069 flow. Second operand 9 states and 203 transitions. [2024-06-28 02:27:34,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 544 transitions, 9517 flow [2024-06-28 02:27:39,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 544 transitions, 9363 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-28 02:27:39,969 INFO L231 Difference]: Finished difference. Result has 374 places, 519 transitions, 8130 flow [2024-06-28 02:27:39,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7915, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8130, PETRI_PLACES=374, PETRI_TRANSITIONS=519} [2024-06-28 02:27:39,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-28 02:27:39,969 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 519 transitions, 8130 flow [2024-06-28 02:27:39,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:39,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:39,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:39,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-28 02:27:39,970 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)] === [2024-06-28 02:27:39,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:39,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1389273870, now seen corresponding path program 12 times [2024-06-28 02:27:39,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:39,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365458142] [2024-06-28 02:27:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:40,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:40,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365458142] [2024-06-28 02:27:40,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365458142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:40,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:40,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:27:40,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879612943] [2024-06-28 02:27:40,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:40,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:27:40,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:27:40,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:27:40,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:40,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 519 transitions, 8130 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:40,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:40,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:40,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:41,708 INFO L124 PetriNetUnfolderBase]: 4143/7038 cut-off events. [2024-06-28 02:27:41,708 INFO L125 PetriNetUnfolderBase]: For 1192714/1192718 co-relation queries the response was YES. [2024-06-28 02:27:41,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63492 conditions, 7038 events. 4143/7038 cut-off events. For 1192714/1192718 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49644 event pairs, 1248 based on Foata normal form. 2/7035 useless extension candidates. Maximal degree in co-relation 63316. Up to 6259 conditions per place. [2024-06-28 02:27:41,804 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 115 changer transitions 0/541 dead transitions. [2024-06-28 02:27:41,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 541 transitions, 9701 flow [2024-06-28 02:27:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:27:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:27:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-28 02:27:41,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-28 02:27:41,805 INFO L175 Difference]: Start difference. First operand has 374 places, 519 transitions, 8130 flow. Second operand 10 states and 223 transitions. [2024-06-28 02:27:41,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 541 transitions, 9701 flow [2024-06-28 02:27:47,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 541 transitions, 9584 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 02:27:47,629 INFO L231 Difference]: Finished difference. Result has 379 places, 522 transitions, 8312 flow [2024-06-28 02:27:47,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8312, PETRI_PLACES=379, PETRI_TRANSITIONS=522} [2024-06-28 02:27:47,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-28 02:27:47,629 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 522 transitions, 8312 flow [2024-06-28 02:27:47,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:47,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:47,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:47,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-28 02:27:47,630 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)] === [2024-06-28 02:27:47,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:47,630 INFO L85 PathProgramCache]: Analyzing trace with hash -891036342, now seen corresponding path program 13 times [2024-06-28 02:27:47,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:47,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763644033] [2024-06-28 02:27:47,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:47,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:47,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763644033] [2024-06-28 02:27:47,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763644033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:47,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:47,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:27:47,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293930106] [2024-06-28 02:27:47,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:47,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:27:47,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:47,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:27:47,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:27:47,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:47,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 522 transitions, 8312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:47,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:47,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:47,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:49,470 INFO L124 PetriNetUnfolderBase]: 4140/7034 cut-off events. [2024-06-28 02:27:49,471 INFO L125 PetriNetUnfolderBase]: For 1210095/1210099 co-relation queries the response was YES. [2024-06-28 02:27:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63623 conditions, 7034 events. 4140/7034 cut-off events. For 1210095/1210099 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 49605 event pairs, 1248 based on Foata normal form. 2/7031 useless extension candidates. Maximal degree in co-relation 63445. Up to 6256 conditions per place. [2024-06-28 02:27:49,567 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 419 selfloop transitions, 116 changer transitions 0/542 dead transitions. [2024-06-28 02:27:49,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 542 transitions, 9628 flow [2024-06-28 02:27:49,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:27:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:27:49,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-28 02:27:49,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-28 02:27:49,568 INFO L175 Difference]: Start difference. First operand has 379 places, 522 transitions, 8312 flow. Second operand 12 states and 257 transitions. [2024-06-28 02:27:49,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 542 transitions, 9628 flow [2024-06-28 02:27:55,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 542 transitions, 9288 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-28 02:27:55,834 INFO L231 Difference]: Finished difference. Result has 383 places, 522 transitions, 8210 flow [2024-06-28 02:27:55,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7972, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8210, PETRI_PLACES=383, PETRI_TRANSITIONS=522} [2024-06-28 02:27:55,835 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-28 02:27:55,835 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 522 transitions, 8210 flow [2024-06-28 02:27:55,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:55,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:27:55,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:27:55,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-28 02:27:55,836 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)] === [2024-06-28 02:27:55,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:27:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -719256042, now seen corresponding path program 14 times [2024-06-28 02:27:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:27:55,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809881241] [2024-06-28 02:27:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:27:55,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:27:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:27:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:27:55,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:27:55,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809881241] [2024-06-28 02:27:55,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809881241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:27:55,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:27:55,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:27:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879486193] [2024-06-28 02:27:55,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:27:55,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:27:55,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:27:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:27:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:27:55,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:27:55,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 522 transitions, 8210 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:27:55,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:27:55,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:27:55,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:27:57,589 INFO L124 PetriNetUnfolderBase]: 4145/7047 cut-off events. [2024-06-28 02:27:57,589 INFO L125 PetriNetUnfolderBase]: For 1232560/1232564 co-relation queries the response was YES. [2024-06-28 02:27:57,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63847 conditions, 7047 events. 4145/7047 cut-off events. For 1232560/1232564 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49794 event pairs, 1248 based on Foata normal form. 2/7044 useless extension candidates. Maximal degree in co-relation 63668. Up to 6262 conditions per place. [2024-06-28 02:27:57,682 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 118 changer transitions 0/543 dead transitions. [2024-06-28 02:27:57,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 543 transitions, 9593 flow [2024-06-28 02:27:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 02:27:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 02:27:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-28 02:27:57,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-28 02:27:57,683 INFO L175 Difference]: Start difference. First operand has 383 places, 522 transitions, 8210 flow. Second operand 10 states and 222 transitions. [2024-06-28 02:27:57,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 543 transitions, 9593 flow [2024-06-28 02:28:04,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 543 transitions, 9347 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-28 02:28:04,543 INFO L231 Difference]: Finished difference. Result has 382 places, 525 transitions, 8273 flow [2024-06-28 02:28:04,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7970, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8273, PETRI_PLACES=382, PETRI_TRANSITIONS=525} [2024-06-28 02:28:04,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-28 02:28:04,544 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 525 transitions, 8273 flow [2024-06-28 02:28:04,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:28:04,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:28:04,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:28:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-28 02:28:04,544 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:28:04,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:28:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1217510310, now seen corresponding path program 15 times [2024-06-28 02:28:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:28:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965743329] [2024-06-28 02:28:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:28:04,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:28:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:28:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:28:04,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:28:04,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965743329] [2024-06-28 02:28:04,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965743329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:28:04,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:28:04,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 02:28:04,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988479247] [2024-06-28 02:28:04,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:28:04,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 02:28:04,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:28:04,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 02:28:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 02:28:04,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:28:04,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 525 transitions, 8273 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:28:04,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:28:04,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:28:04,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:28:06,326 INFO L124 PetriNetUnfolderBase]: 4142/7039 cut-off events. [2024-06-28 02:28:06,327 INFO L125 PetriNetUnfolderBase]: For 1251263/1251267 co-relation queries the response was YES. [2024-06-28 02:28:06,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63931 conditions, 7039 events. 4142/7039 cut-off events. For 1251263/1251267 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49666 event pairs, 1246 based on Foata normal form. 2/7036 useless extension candidates. Maximal degree in co-relation 63751. Up to 6259 conditions per place. [2024-06-28 02:28:06,426 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 418 selfloop transitions, 119 changer transitions 0/544 dead transitions. [2024-06-28 02:28:06,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 544 transitions, 9391 flow [2024-06-28 02:28:06,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 02:28:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 02:28:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-28 02:28:06,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-28 02:28:06,427 INFO L175 Difference]: Start difference. First operand has 382 places, 525 transitions, 8273 flow. Second operand 12 states and 256 transitions. [2024-06-28 02:28:06,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 544 transitions, 9391 flow [2024-06-28 02:28:13,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 544 transitions, 9052 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 02:28:13,916 INFO L231 Difference]: Finished difference. Result has 386 places, 525 transitions, 8178 flow [2024-06-28 02:28:13,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8178, PETRI_PLACES=386, PETRI_TRANSITIONS=525} [2024-06-28 02:28:13,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 345 predicate places. [2024-06-28 02:28:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 525 transitions, 8178 flow [2024-06-28 02:28:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:28:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 02:28:13,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 02:28:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-28 02:28:13,918 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 02:28:13,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 02:28:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1084908621, now seen corresponding path program 11 times [2024-06-28 02:28:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 02:28:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130048608] [2024-06-28 02:28:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 02:28:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 02:28:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 02:28:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 02:28:14,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 02:28:14,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130048608] [2024-06-28 02:28:14,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130048608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 02:28:14,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 02:28:14,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 02:28:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331602002] [2024-06-28 02:28:14,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 02:28:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 02:28:14,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 02:28:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 02:28:14,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-28 02:28:14,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-28 02:28:14,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 525 transitions, 8178 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 02:28:14,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 02:28:14,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-28 02:28:14,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 02:28:15,632 INFO L124 PetriNetUnfolderBase]: 4119/7008 cut-off events. [2024-06-28 02:28:15,633 INFO L125 PetriNetUnfolderBase]: For 1268277/1268284 co-relation queries the response was YES. [2024-06-28 02:28:15,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62794 conditions, 7008 events. 4119/7008 cut-off events. For 1268277/1268284 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 49542 event pairs, 1224 based on Foata normal form. 16/7021 useless extension candidates. Maximal degree in co-relation 62613. Up to 6152 conditions per place. [2024-06-28 02:28:15,730 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 414 selfloop transitions, 133 changer transitions 0/554 dead transitions. [2024-06-28 02:28:15,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 554 transitions, 9368 flow [2024-06-28 02:28:15,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 02:28:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 02:28:15,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-28 02:28:15,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-28 02:28:15,731 INFO L175 Difference]: Start difference. First operand has 386 places, 525 transitions, 8178 flow. Second operand 9 states and 211 transitions. [2024-06-28 02:28:15,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 554 transitions, 9368 flow